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HuttenlocherTechnologies
Updated 3 h ago

Vulnerability database

Every flaw the U.S. government’s cybersecurity agency (CISA) has confirmed attackers are using, plus the new WordPress plugin and theme bugs published each day, sorted by what they mean for a small business. We refresh it twice a day. If you see something your website or office runs, tell us.

1,764exploited flaws on CISA’s list
35added in the last 30 days
479new WordPress flaws this week
390,525entries in the database

31 results

  • Oct 13, 2026Libreswan's pluto daemon has a use-after-free vulnerability when a client connecting using IKE over TCP closes the connection and another packet (retransmit or CVE-2026-94453 · Other software · The Libreswan Project · reported by d42dc95b-23f1-4e06-9076-20753a0fb0dfHigh 7.5

    Libreswan's pluto daemon has a use-after-free vulnerability when a client connecting using IKE over TCP closes the connection and another packet (retransmit or malicious) is received for the same tuple. IKE state is retained in memory after the client closes the connection, storing a pointer to iface_endpoint inside ike_sa.sa->st_iface_endpoint. Once this invalid pointer is used, the daemon crashes and restarts. This vulnerability can be triggered before the remote peer has authenticated itself. Continued exploitation can lead to a denial of service. Remote code execution could be possible. The IKE over TCP option is not enabled by default; only configurations that contain listen-tcp=yes are affected.

    Product
    libreswan
    What to do
    Apply the vendor’s update. The NVD record links to the advisory.
  • Oct 13, 2026Libreswan has a null pointer dereference bug in the PKCS#7 handling code for IKE certificate authentication.CVE-2026-77207 · Other software · The Libreswan Project · reported by d42dc95b-23f1-4e06-9076-20753a0fb0dfHigh 7.5

    Libreswan has a null pointer dereference bug in the PKCS#7 handling code for IKE certificate authentication. When libreswan decodes an IKE CERT payload of type CERT_PKCS7_WRAPPED_X509, it guards the PKCS#7 blob with SEC_PKCS7ContainsCertsOrCrls() and then iterates the certificate list with SEC_PKCS7GetCertificateList(). The two NSS APIs disagree on a SignedData that carries a CRL but no certificates: ContainsCertsOrCrls() returns PR_TRUE (there is a CRL), so the guard passes, but GetCertificateList() returns NULL (there are no certificates). This causes libreswan to dereference a null pointer leading to a crash and restart. A malicious IKE_AUTH packet can trigger this bug, meaning the peer does not need to be authenticated. No remote code execution is possible. Continued exploitation can cause a denial of service.

    Product
    libreswan
    What to do
    Apply the vendor’s update. The NVD record links to the advisory.
  • Oct 13, 2026Libreswan's IKEv2 state machine has a null pointer dereference bug in the EAP handling code for authentication.CVE-2026-77206 · Other software · The Libreswan Project · reported by d42dc95b-23f1-4e06-9076-20753a0fb0dfHigh 7.5

    Libreswan's IKEv2 state machine has a null pointer dereference bug in the EAP handling code for authentication. As a result of inconsistency within the IKEv2 state machine code, this bug can be triggered by any IKEv2 connection, even if EAP is not configured at all. The error is caused by a fall-through where it incorrectly dereferences ike->sa.st_eap which is NULL. A malicious IKE_AUTH packet can trigger this bug, meaning the peer does not need to be authenticated. The bug results in a crash and restart of the pluto daemon. No remote code execution is possible. Continued exploitation can cause a denial of service.

    Product
    libreswan
    What to do
    Apply the vendor’s update. The NVD record links to the advisory.
  • Oct 13, 2026Libreswan in FIPS mode has a vulnerability where badly formed received certificates are rejected, but not deleted from the NSS cache.CVE-2026-77205 · Other software · The Libreswan Project · reported by d42dc95b-23f1-4e06-9076-20753a0fb0dfLow 3.7

    Libreswan in FIPS mode has a vulnerability where badly formed received certificates are rejected, but not deleted from the NSS cache. As a result, any real certificates with the same serial number are rejected as well. This can be abused to lock out legitimate peers from connecting. The add_decoded_cert() function missed a call to CERT_DestroyCertificate() due to an incorrect fix for CVE-2026-14957. Sending bogus certificates with new serial numbers could prevent the real certificates with those serial numbers from connecting until the service has restarted.

    Product
    libreswan
    What to do
    Apply the vendor’s update. The NVD record links to the advisory.
  • Sep 1, 2026In FIPS mode, Libreswan's add_decoded_cert() function calls CERT_ExtractPublicKey() and asserts that the result is not NULL.CVE-2026-14957 · Other software · The Libreswan Project · reported by d42dc95b-23f1-4e06-9076-20753a0fb0dfHigh 7.5

    In FIPS mode, Libreswan's add_decoded_cert() function calls CERT_ExtractPublicKey() and asserts that the result is not NULL. However, CERT_ExtractPublicKey() returns NULL when public key extraction fails, for example if the RSA exponent is set to 0. A remote attacker can send a malformed X.509 certificate in a CERT payload to trigger the assertion, causing the pluto daemon to abort and restart. Continued exploitation causes a denial of service. No remote code execution is possible. Both IKEv1 and IKEv2 are affected. The vulnerability is only exploitable when both the OS and libreswan are running in FIPS mode and at least one CA certificate is loaded. The CERT payload is processed before peer authentication, so no credentials are needed to exploit this. Configurations using only PreSharedKey (PSK) authentication with no CA certificates loaded in the NSS database are not vulnerable.

    Product
    libreswan
    What to do
    Apply the vendor’s update. The NVD record links to the advisory.
  • Jul 2, 2026Libreswan, via the function RSA_authenticate_hash_signature_pkcs1_1_5_rsa(), did not correctly verify the DER encoding of the ASN.1 digest when the IKEv2 AUTH pCVE-2026-50722 · Other software · The Libreswan Project · reported by d42dc95b-23f1-4e06-9076-20753a0fb0dfHigh 8.1

    Libreswan, via the function RSA_authenticate_hash_signature_pkcs1_1_5_rsa(), did not correctly verify the DER encoding of the ASN.1 digest when the IKEv2 AUTH payload was encoded using RSASSA-PKCS1-v1_5 (RFC 8017). A remote attacker can use a variation on the Bleichenbacher attack to forge the AUTH payload when small public exponents are used (e.g., e=3), leading to impersonation. Additionally, a remote attacker, by encoding a shorter than expected hash in the AUTH payload, could trigger an assertion leading to denial-of-service. The daemon aborts and restarts; continued exploitation causes sustained denial of service. Remote code execution is not possible. X.509 certificate verifications of the remote IKE peer are not affected.

    Product
    libreswan
    What to do
    Apply the vendor’s update. The NVD record links to the advisory.
  • Jul 2, 2026Libreswan, via the function RSA_authenticate_hash_signature_raw_rsa(), did not correctly verify the length of the authentication hash when the SIG payload of anCVE-2026-50721 · Other software · The Libreswan Project · reported by d42dc95b-23f1-4e06-9076-20753a0fb0dfHigh 8.1

    Libreswan, via the function RSA_authenticate_hash_signature_raw_rsa(), did not correctly verify the length of the authentication hash when the SIG payload of an IKEv1 packet was encoded using PKCS #1 RSA Encryption as per RFC 2313. A remote attacker can use a variation on the Bleichenbacher attack to forge the SIG payload when small public exponents are being used (e.g., e=3), which could lead to impersonation. Additionally, a remote attacker, by encoding a shorter than expected hash in the SIG payload, could trigger an assertion leading to denial-of-service. The daemon aborts and restarts; continued exploitation causes sustained denial of service. Remote code execution is not possible. X.509 certificate verifications of remote IKE peers are not affected.

    Product
    libreswan
    What to do
    Apply the vendor’s update. The NVD record links to the advisory.
  • Jul 2, 2026An invalidly formatted IKEv2 fragment causes the Libreswan pluto daemon to crash and restart.CVE-2026-12413 · Other software · The Libreswan Project · reported by d42dc95b-23f1-4e06-9076-20753a0fb0dfHigh 7.5

    An invalidly formatted IKEv2 fragment causes the Libreswan pluto daemon to crash and restart. Continued exploitation would cause a denial of service. The function reassemble_v2_incoming_fragments() would ignore unknown outer payloads but still store these in a fixed size array msg_digest.digest[PAYLIMIT]. An off-by-one error in the assertion PASSERT(logger, md->digest_roof < elemsof(md->digest)) causes the daemon to abort. No remote code execution is possible. Any configuration that allows IKEv2 connections that do not set fragmentation=no are vulnerable. IKEv1 is not affected.

    Product
    libreswan
    What to do
    Apply the vendor’s update. The NVD record links to the advisory.
  • Oct 22, 2024A flaw was found in the libreswan client plugin for NetworkManager (NetkworkManager-libreswan), where it fails to properly sanitize the VPN configuration from tCVE-2024-9050 · Other software · Red Hat · reported by Red HatHigh 7.8

    A flaw was found in the libreswan client plugin for NetworkManager (NetkworkManager-libreswan), where it fails to properly sanitize the VPN configuration from the local unprivileged user. In this configuration, composed by a key-value format, the plugin fails to escape special characters, leading the application to interpret values as keys. One of the most critical parameters that could be abused by a malicious user is the `leftupdown`key. This key takes an executable command as a value and is used to specify what executes as a callback in NetworkManager-libreswan to retrieve configuration settings back to NetworkManager. As NetworkManager uses Polkit to allow an unprivileged user to control the system's network configuration, a malicious actor could achieve local privilege escalation and potential code execution as root in the targeted machine by creating a malicious configuration.

    Product
    Red Hat Enterprise Linux 7.7 Advanced Update Support
    What to do
    Apply the vendor’s update. The NVD record links to the advisory.
  • Apr 10, 2024The Libreswan Project was notified of an issue causing libreswan to restart when using IKEv1 without specifying an esp= line.CVE-2024-3652 · Other software · The Libreswan Project (www.libreswan.org) · reported by d42dc95b-23f1-4e06-9076-20753a0fb0dfMedium 6.5

    The Libreswan Project was notified of an issue causing libreswan to restart when using IKEv1 without specifying an esp= line. When the peer requests AES-GMAC, libreswan's default proposal handler causes an assertion failure and crashes and restarts. IKEv2 connections are not affected.

    Product
    libreswan
    What to do
    Apply the vendor’s update. The NVD record links to the advisory.
  • Mar 11, 2024The Libreswan Project was notified of an issue causing libreswan to restart under some IKEv2 retransmit scenarios when a connection is configured to use PreSharCVE-2024-2357 · Other software · The Libreswan Project (www.libreswan.org) · reported by d42dc95b-23f1-4e06-9076-20753a0fb0dfMedium 6.5

    The Libreswan Project was notified of an issue causing libreswan to restart under some IKEv2 retransmit scenarios when a connection is configured to use PreSharedKeys (authby=secret) and the connection cannot find a matching configured secret. When such a connection is automatically added on startup using the auto= keyword, it can cause repeated crashes leading to a Denial of Service.

    Product
    libreswan
    What to do
    Apply the vendor’s update. The NVD record links to the advisory.
  • Aug 25, 2023An issue was discovered in Libreswan 3.x and 4.x before 4.12.CVE-2023-38712 · Other software · Libreswan · reported by MITREMedium 6.5

    An issue was discovered in Libreswan 3.x and 4.x before 4.12. When an IKEv1 ISAKMP SA Informational Exchange packet contains a Delete/Notify payload followed by further Notifies that act on the ISAKMP SA, such as a duplicated Delete/Notify message, a NULL pointer dereference on the deleted state causes the pluto daemon to crash and restart.

    Product
    Libreswan
    What to do
    Apply the vendor’s update. The NVD record links to the advisory.
  • Aug 25, 2023An issue was discovered in Libreswan before 4.12.CVE-2023-38711 · Other software · Libreswan · reported by MITREMedium 6.5

    An issue was discovered in Libreswan before 4.12. When an IKEv1 Quick Mode connection configured with ID_IPV4_ADDR or ID_IPV6_ADDR receives an IDcr payload with ID_FQDN, a NULL pointer dereference causes a crash and restart of the pluto daemon. NOTE: the earliest affected version is 4.6.

    Product
    Libreswan
    What to do
    Apply the vendor’s update. The NVD record links to the advisory.
  • Aug 25, 2023An issue was discovered in Libreswan before 4.12.CVE-2023-38710 · Other software · Libreswan · reported by MITREMedium 6.5

    An issue was discovered in Libreswan before 4.12. When an IKEv2 Child SA REKEY packet contains an invalid IPsec protocol ID number of 0 or 1, an error notify INVALID_SPI is sent back. The notify payload's protocol ID is copied from the incoming packet, but the code that verifies outgoing packets fails an assertion that the protocol ID must be ESP (2) or AH(3) and causes the pluto daemon to crash and restart. NOTE: the earliest affected version is 3.20.

    Product
    Libreswan
    What to do
    Apply the vendor’s update. The NVD record links to the advisory.
  • May 28, 2023pluto in Libreswan before 4.11 allows a denial of service (responder SPI mishandling and daemon crash) via unauthenticated IKEv1 Aggressive Mode packets.CVE-2023-30570 · Other software · Libreswan · reported by MITREHigh 7.5

    pluto in Libreswan before 4.11 allows a denial of service (responder SPI mishandling and daemon crash) via unauthenticated IKEv1 Aggressive Mode packets. The earliest affected version is 3.28.

    Product
    Libreswan
    What to do
    Apply the vendor’s update. The NVD record links to the advisory.
  • May 17, 2023A vulnerability was found in the libreswan library.CVE-2023-2295 · Other software · Libreswan · reported by Red HatHigh 7.5

    A vulnerability was found in the libreswan library. This security issue occurs when an IKEv1 Aggressive Mode packet is received with only unacceptable crypto algorithms, and the response packet is not sent with a zero responder SPI. When a subsequent packet is received where the sender reuses the libreswan responder SPI as its own initiator SPI, the pluto daemon state machine crashes. No remote code execution is possible. This CVE exists because of a CVE-2023-30570 security regression for libreswan package in Red Hat Enterprise Linux 8.8 and Red Hat Enterprise Linux 9.2.

    Product
    Libreswan
    What to do
    Apply the vendor’s update. The NVD record links to the advisory.
  • Feb 21, 2023Libreswan 4.9 allows remote attackers to cause a denial of service (assert failure and daemon restart) via crafted TS payload with an incorrect selector length.CVE-2023-23009 · Other software · Libreswan · reported by MITREMedium 6.5

    Libreswan 4.9 allows remote attackers to cause a denial of service (assert failure and daemon restart) via crafted TS payload with an incorrect selector length.

    Product
    Libreswan
    What to do
    Apply the vendor’s update. The NVD record links to the advisory.
  • Jan 14, 2022Libreswan 4.2 through 4.5 allows remote attackers to cause a denial of service (NULL pointer dereference and daemon crash) via a crafted IKEv1 packet because plCVE-2022-23094 · Other software · Libreswan · reported by MITREHigh 7.5

    Libreswan 4.2 through 4.5 allows remote attackers to cause a denial of service (NULL pointer dereference and daemon crash) via a crafted IKEv1 packet because pluto/ikev1.c wrongly expects that a state object exists. This is fixed in 4.6.

    Product
    Libreswan
    What to do
    Apply the vendor’s update. The NVD record links to the advisory.
  • May 12, 2020An out-of-bounds buffer read flaw was found in the pluto daemon of libreswan from versions 3.27 till 3.31 where, an unauthenticated attacker could use this flawCVE-2020-1763 · Other software · the libreswan Project · reported by Red HatHigh 7.5

    An out-of-bounds buffer read flaw was found in the pluto daemon of libreswan from versions 3.27 till 3.31 where, an unauthenticated attacker could use this flaw to crash libreswan by sending specially-crafted IKEv1 Informational Exchange packets. The daemon respawns after the crash.

    Product
    libreswan
    What to do
    Apply the vendor’s update. The NVD record links to the advisory.
  • Jun 12, 2019The Libreswan Project has found a vulnerability in the processing of IKEv1 informational exchange packets which are encrypted and integrity protected using the CVE-2019-10155 · Other software · the libreswan Project · reported by Red HatLow 3.1

    The Libreswan Project has found a vulnerability in the processing of IKEv1 informational exchange packets which are encrypted and integrity protected using the established IKE SA encryption and integrity keys, but as a receiver, the integrity check value was not verified. This issue affects versions before 3.29.

    Product
    libreswan
    What to do
    Apply the vendor’s update. The NVD record links to the advisory.
  • May 24, 2019In Libreswan 3.27 an assertion failure can lead to a pluto IKE daemon restart.CVE-2019-12312 · Other software · Libreswan · reported by MITREHigh 7.5

    In Libreswan 3.27 an assertion failure can lead to a pluto IKE daemon restart. An attacker can trigger a NULL pointer dereference by initiating an IKEv2 IKE_SA_INIT exchange, followed by a bogus INFORMATIONAL exchange instead of the normallly expected IKE_AUTH exchange. This affects send_v2N_spi_response_from_state() in programs/pluto/ikev2_send.c that will then trigger a NULL pointer dereference leading to a restart of libreswan.

    Product
    Libreswan
    What to do
    Apply the vendor’s update. The NVD record links to the advisory.
  • Jun 13, 2017libreswan before 3.18 allows remote attackers to cause a denial of service (NULL pointer dereference and pluto daemon restart).CVE-2016-5391 · Other software · Libreswan · reported by Red HatHigh 7.5

    libreswan before 3.18 allows remote attackers to cause a denial of service (NULL pointer dereference and pluto daemon restart).

    Product
    Libreswan
    What to do
    Apply the vendor’s update. The NVD record links to the advisory.
  • Jun 16, 2016programs/pluto/ikev1.c in libreswan before 3.17 retransmits in initial-responder states, which allows remote attackers to cause a denial of service (traffic ampCVE-2016-5361 · Other software · Libreswan · reported by MITREHigh 7.5

    programs/pluto/ikev1.c in libreswan before 3.17 retransmits in initial-responder states, which allows remote attackers to cause a denial of service (traffic amplification) via a spoofed UDP packet. NOTE: the original behavior complies with the IKEv1 protocol, but has a required security update from the libreswan vendor; as of 2016-06-10, it is expected that several other IKEv1 implementations will have vendor-required security updates, with separate CVE IDs assigned to each.

    Product
    Libreswan
    What to do
    Apply the vendor’s update. The NVD record links to the advisory.
  • Apr 18, 2016Libreswan 3.16 might allow remote attackers to cause a denial of service (daemon restart) via an IKEv2 aes_xcbc transform.CVE-2016-3071 · Other software · Libreswan · reported by Red HatHigh 7.5

    Libreswan 3.16 might allow remote attackers to cause a denial of service (daemon restart) via an IKEv2 aes_xcbc transform.

    Product
    Libreswan
    What to do
    Apply the vendor’s update. The NVD record links to the advisory.
  • Nov 9, 2015The pluto IKE daemon in libreswan before 3.15 and Openswan before 2.6.45, when built with NSS, allows remote attackers to cause a denial of service (assertion fCVE-2015-3240 · Other software · Libreswan · reported by Red HatMedium 4.3

    The pluto IKE daemon in libreswan before 3.15 and Openswan before 2.6.45, when built with NSS, allows remote attackers to cause a denial of service (assertion failure and daemon restart) via a zero DH g^x value in a KE payload in a IKE packet.

    Product
    Libreswan
    What to do
    Apply the vendor’s update. The NVD record links to the advisory.
  • Jul 1, 2015libreswan 3.9 through 3.12 allows remote attackers to cause a denial of service (daemon restart) via an IKEv1 packet with (1) unassigned bits set in the IPSEC DCVE-2015-3204 · Other software · Libreswan · reported by Red HatMedium 5

    libreswan 3.9 through 3.12 allows remote attackers to cause a denial of service (daemon restart) via an IKEv1 packet with (1) unassigned bits set in the IPSEC DOI value or (2) the next payload value set to ISAKMP_NEXT_SAK.

    Product
    Libreswan
    What to do
    Apply the vendor’s update. The NVD record links to the advisory.
  • Jan 26, 2014Libreswan 3.7 and earlier allows remote attackers to cause a denial of service (NULL pointer dereference and IKE daemon restart) via IKEv2 packets that lack expCVE-2013-6467 · Other software · Libreswan · reported by Red HatMedium 5

    Libreswan 3.7 and earlier allows remote attackers to cause a denial of service (NULL pointer dereference and IKE daemon restart) via IKEv2 packets that lack expected payloads.

    Product
    Libreswan
    What to do
    Apply the vendor’s update. The NVD record links to the advisory.
  • Jan 16, 2014The ikev2parent_inI1outR1 function in pluto/ikev2_parent.c in libreswan before 3.7 allows remote attackers to cause a denial of service (restart) via an IKEv2 ICVE-2013-7294 · Other software · Libreswan · reported by MITREMedium 5

    The ikev2parent_inI1outR1 function in pluto/ikev2_parent.c in libreswan before 3.7 allows remote attackers to cause a denial of service (restart) via an IKEv2 I1 notification without a KE payload.

    Product
    Libreswan
    What to do
    Apply the vendor’s update. The NVD record links to the advisory.
  • Jan 9, 2014Race condition in the libreswan.spec files for Red Hat Enterprise Linux (RHEL) and Fedora packages in libreswan 3.6 has unspecified impact and attack vectors, iCVE-2013-7283 · Other software · Libreswan · reported by MITREHigh 9.3

    Race condition in the libreswan.spec files for Red Hat Enterprise Linux (RHEL) and Fedora packages in libreswan 3.6 has unspecified impact and attack vectors, involving the /var/tmp/libreswan-nss-pwd temporary file.

    Product
    Libreswan
    What to do
    Apply the vendor’s update. The NVD record links to the advisory.
  • Jan 7, 2014Libreswan 3.6 allows remote attackers to cause a denial of service (crash) via a small length value and (1) no version or (2) an invalid major number in an IKE CVE-2013-4564 · Other software · Libreswan · reported by Red HatMedium 5

    Libreswan 3.6 allows remote attackers to cause a denial of service (crash) via a small length value and (1) no version or (2) an invalid major number in an IKE packet.

    Product
    Libreswan
    What to do
    Apply the vendor’s update. The NVD record links to the advisory.
  • Jul 9, 2013Buffer overflow in the atodn function in libreswan 3.0 and 3.1, when Opportunistic Encryption is enabled and an RSA key is being used, allows remote attackers tCVE-2013-2052 · Other software · Libreswan · reported by Red HatMedium 5.1

    Buffer overflow in the atodn function in libreswan 3.0 and 3.1, when Opportunistic Encryption is enabled and an RSA key is being used, allows remote attackers to cause a denial of service (pluto IKE daemon crash) and possibly execute arbitrary code via crafted DNS TXT records. NOTE: this might be the same vulnerability as CVE-2013-2053 and CVE-2013-2054.

    Product
    Libreswan
    What to do
    Apply the vendor’s update. The NVD record links to the advisory.

Where this comes from: the exploited list is CISA’s Known Exploited Vulnerabilities catalog. Everything else is the whole National Vulnerability Database, where each record is published by the team that found the bug (Wordfence, Patchstack, WPScan, the vendors themselves and others); we show who. Exploit odds are FIRST’s EPSS, updated daily. Titles and categories are ours, so check the linked record before acting on a detail. For a write-up of the big ones, see our advisories. Every vendor, and every WordPress plugin and theme with a recorded flaw, also has its own page. All of it is free to reuse as JSON, CSV or RSS.

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