libreswan - Debian Package Tracker

general

source: libreswan (main)
version: 5.2-2.4
maintainer: Daniel Kahn Gillmor (DMD)
uploaders: Ondřej Surý [DMD] – Paul Wouters [DMD]
arch: any
std-ver: 4.7.1
VCS: Git (Browse, QA)

versions [more versions can be listed by madison] [old versions available from snapshot.debian.org]

[pool directory]

o-o-stable: 4.3-1+deb11u4
o-o-sec: 4.3-1+deb11u3
oldstable: 4.10-2+deb12u1
stable: 5.2-2.2
testing: 5.2-2.4
unstable: 5.2-2.4

versioned links

4.3-1+deb11u3: [.dsc, use dget on this link to retrieve source package] [changelog] [copyright] [rules] [control]
4.3-1+deb11u4: [.dsc, use dget on this link to retrieve source package] [changelog] [copyright] [rules] [control]
4.10-2+deb12u1: [.dsc, use dget on this link to retrieve source package] [changelog] [copyright] [rules] [control]
5.2-2.2: [.dsc, use dget on this link to retrieve source package] [changelog] [copyright] [rules] [control]
5.2-2.4: [.dsc, use dget on this link to retrieve source package] [changelog] [copyright] [rules] [control]

binaries

libreswan (5 bugs: 0, 4, 1, 0)

action needed

A new upstream version is available: 5.3.1 high

A new upstream version 5.3.1 is available, you should consider packaging it.

Created: 2025-12-17 Last update: 2026-07-04 02:00

3 security issues in trixie high

There are 3 open security issues in trixie.

3 important issues:

CVE-2026-12413: 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.
CVE-2026-50721: 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.
CVE-2026-50722: 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.

Created: 2026-07-03 Last update: 2026-07-03 21:00

3 security issues in sid high

There are 3 open security issues in sid.

3 important issues:

CVE-2026-12413: 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.
CVE-2026-50721: 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.
CVE-2026-50722: 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.

Created: 2026-07-03 Last update: 2026-07-03 21:00

3 security issues in forky high

There are 3 open security issues in forky.

3 important issues:

CVE-2026-12413: 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.
CVE-2026-50721: 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.
CVE-2026-50722: 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.

Created: 2026-07-03 Last update: 2026-07-03 21:00

3 security issues in bullseye high

There are 3 open security issues in bullseye.

3 important issues:

CVE-2026-12413: 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.
CVE-2026-50721: 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.
CVE-2026-50722: 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.

Created: 2026-07-03 Last update: 2026-07-03 21:00

8 security issues in bookworm high

There are 8 open security issues in bookworm.

7 important issues:

CVE-2024-3652: 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.
CVE-2023-38710: 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.
CVE-2023-38711: 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.
CVE-2023-38712: 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.
CVE-2026-12413: 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.
CVE-2026-50721: 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.
CVE-2026-50722: 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.

1 issue left for the package maintainer to handle:

CVE-2024-2357: (needs triaging) 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.

You can find information about how to handle this issue in the security team's documentation.

Created: 2023-08-17 Last update: 2026-07-03 21:00

The VCS repository is not up to date, push the missing commits. high

vcswatch reports that the current version of the package is not in its VCS.
Either you need to push your commits and/or your tags, or the information about the package's VCS are out of date. A common cause of the latter issue when using the Git VCS is not specifying the correct branch when the packaging is not in the default one (remote HEAD branch), which is usually "master" but can be modified in salsa.debian.org in the project's general settings with the "Default Branch" field). Alternatively the Vcs-Git field in debian/control can contain a "-b <branch-name>" suffix to indicate what branch is used for the Debian packaging.

Created: 2025-05-10 Last update: 2026-06-27 21:30

4 security issues in buster high

There are 4 open security issues in buster.

4 important issues:

CVE-2024-2357: 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.
CVE-2024-3652: 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.
CVE-2023-38710: 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.
CVE-2023-38712: 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.

Created: 2023-08-17 Last update: 2024-06-09 21:00

1 bug tagged help in the BTS normal

The BTS contains 1 bug tagged help, please consider helping the maintainer in dealing with it.

Created: 2019-03-21 Last update: 2026-07-04 02:30

2 bugs tagged patch in the BTS normal

The BTS contains patches fixing 2 bugs, consider including or untagging them.

Created: 2026-06-02 Last update: 2026-07-04 02:30

lintian reports 3 warnings normal

Lintian reports 3 warnings about this package. You should make the package lintian clean getting rid of them.

Created: 2026-01-24 Last update: 2026-02-28 11:00

debian/patches: 2 patches to forward upstream low

Among the 4 debian patches available in version 5.2-2.4 of the package, we noticed the following issues:

2 patches where the metadata indicates that the patch has not yet been forwarded upstream. You should either forward the patch upstream or update the metadata to document its real status.

Created: 2023-02-26 Last update: 2026-01-24 19:01

Standards version of the package is outdated. wishlist

The package should be updated to follow the last version of Debian Policy (Standards-Version 4.7.4 instead of 4.7.1).

Created: 2025-02-27 Last update: 2026-03-31 15:01

news

[rss feed]

[2026-05-30] libreswan 5.2-2.4 MIGRATED to testing (Debian testing watch)
[2026-05-29] libreswan REMOVED from testing (Debian testing watch)
[2026-01-29] libreswan 5.2-2.4 MIGRATED to testing (Debian testing watch)
[2026-01-24] Accepted libreswan 5.2-2.4 (source) into unstable (Adrian Bunk)
[2025-12-17] Accepted libreswan 5.2-2.3 (source) into unstable (Adrian Bunk)
[2025-05-30] libreswan 5.2-2.2 MIGRATED to testing (Debian testing watch)
[2025-05-09] Accepted libreswan 5.2-2.2 (source) into unstable (Chris Hofstaedtler) (signed by: Christian Hofstaedtler)
[2025-03-28] libreswan 5.2-2.1 MIGRATED to testing (Debian testing watch)
[2025-03-26] Accepted libreswan 5.2-2.1 (source) into unstable (Michael Biebl)
[2025-03-08] libreswan 5.2-2 MIGRATED to testing (Debian testing watch)
[2025-03-04] Accepted libreswan 5.2-2 (source) into unstable (Daniel Kahn Gillmor) (signed by: dkg@debian.org)
[2025-03-02] libreswan 4.15-1 MIGRATED to testing (Debian testing watch)
[2025-02-27] Accepted libreswan 5.2-1 (source) into experimental (Daniel Kahn Gillmor) (signed by: dkg@debian.org)
[2025-02-27] Accepted libreswan 4.15-1 (source) into unstable (Daniel Kahn Gillmor) (signed by: dkg@debian.org)
[2024-10-05] libreswan 4.14-1.1 MIGRATED to testing (Debian testing watch)
[2024-09-25] Accepted libreswan 4.14-1.1 (source) into unstable (Michael Biebl)
[2024-08-24] libreswan REMOVED from testing (Debian testing watch)
[2024-05-04] libreswan 4.14-1 MIGRATED to testing (Debian testing watch)
[2024-03-14] Accepted libreswan 5.0~rc2-2 (source) into experimental (Daniel Kahn Gillmor) (signed by: dkg@debian.org)
[2024-03-12] Accepted libreswan 4.14-1 (source) into unstable (Daniel Kahn Gillmor) (signed by: dkg@debian.org)
[2024-03-12] Accepted libreswan 5.0~rc2-1 (source) into experimental (Daniel Kahn Gillmor) (signed by: dkg@debian.org)
[2024-03-12] Accepted libreswan 4.12-3 (source) into unstable (Daniel Kahn Gillmor) (signed by: dkg@debian.org)
[2024-03-12] Accepted libreswan 4.12-2 (source) into unstable (Daniel Kahn Gillmor) (signed by: dkg@debian.org)
[2024-02-16] libreswan REMOVED from testing (Debian testing watch)
[2023-08-13] libreswan 4.12-1 MIGRATED to testing (Debian testing watch)
[2023-08-10] Accepted libreswan 4.12-1 (source) into unstable (Daniel Kahn Gillmor) (signed by: dkg@debian.org)
[2023-06-16] Accepted libreswan 4.3-1+deb11u4 (source) into oldstable-proposed-updates (Debian FTP Masters) (signed by: dkg@debian.org)
[2023-06-13] libreswan 4.11-1 MIGRATED to testing (Debian testing watch)
[2023-06-02] Accepted libreswan 4.10-2+deb12u1 (source) into testing-proposed-updates (Daniel Kahn Gillmor) (signed by: dkg@debian.org)
[2023-06-02] Accepted libreswan 4.11-1 (source) into unstable (Daniel Kahn Gillmor) (signed by: dkg@debian.org)

bugs [bug history graph]

all: 9
RC: 1
I&N: 7
M&W: 1
F&P: 0
patch: 2
help: 1

links

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ubuntu

[Information about Ubuntu for Debian Developers]

version: 5.2-2.2ubuntu2