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Package "libssh"

Name: libssh

Description:

This package is just an umbrella for a group of other packages, it has no description.
Description samples from packages in group:

  • tiny C SSH library (OpenSSL flavor)
  • tiny C SSH library - Development files (OpenSSL flavor)
  • tiny C SSH library - Documentation files
  • tiny C SSH library (gcrypt flavor)
Latest version: 0.9.6-2ubuntu0.22.04.6
Release: jammy (22.04)
Level: updates
Repository: main

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Other versions of "libssh" in Jammy

Repository Area Version
base main 0.9.6-2build1
security main 0.9.6-2ubuntu0.22.04.6

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Changelog

Version: 0.9.6-2ubuntu0.22.04.6 2026-02-19 00:07:46 UTC

  libssh (0.9.6-2ubuntu0.22.04.6) jammy-security; urgency=medium

  * SECURITY UPDATE: memory leak in key exchange
    - debian/patches/CVE-2025-8277-1.patch: adjust packet filter to work
      when DH-GEX is guessed wrongly in src/packet.c.
    - debian/patches/CVE-2025-8277-2.patch: fix memory leak of unused
      ephemeral key pair after client's wrong KEX guess in src/dh_crypto.c,
      src/dh_key.c, src/ecdh_crypto.c, src/ecdh_gcrypt.c,
      src/ecdh_mbedcrypto.c.
    - debian/patches/CVE-2025-8277-3.patch: free previously allocated
      pubkeys in src/ecdh_crypto.c, src/ecdh_gcrypt.c.
    - debian/patches/CVE-2025-8277-4.patch: avoid leaking ecdh keys in
      src/ecdh_mbedcrypto.c, src/wrapper.c.
    - CVE-2025-8277
  * SECURITY UPDATE: Improper sanitation of paths received from SCP servers
    - debian/patches/CVE-2026-0964.patch: reject invalid paths received
      through scp in src/scp.c.
    - CVE-2026-0964
  * SECURITY UPDATE: DoS via improper configuration file handling
    - debian/patches/CVE-2026-0965.patch: do not attempt to read
      non-regular and too large configuration files in
      include/libssh/misc.h, include/libssh/priv.h, src/bind_config.c,
      src/config.c, src/dh-gex.c, src/known_hosts.c, src/knownhosts.c,
      src/misc.c, tests/unittests/torture_config.c.
    - CVE-2026-0965
  * SECURITY UPDATE: Buffer underflow in ssh_get_hexa() on invalid input
    - debian/patches/CVE-2026-0966-1.patch: avoid heap buffer underflow in
      ssh_get_hexa in src/misc.c.
    - debian/patches/CVE-2026-0966-2.patch: test coverage for ssh_get_hexa
      in tests/unittests/torture_misc.c.
    - debian/patches/CVE-2026-0966-3.patch: update guided tour to use
      SHA256 fingerprints in doc/guided_tour.dox.
    - CVE-2026-0966
  * SECURITY UPDATE: DoS via inefficient regular expression processing
    - debian/patches/CVE-2026-0967.patch: avoid recursive matching (ReDoS)
      in src/match.c, tests/unittests/torture_config.c.
    - CVE-2026-0967
  * SECURITY UPDATE: DoS due to malformed SFTP message
    - debian/patches/CVE-2026-0968-1.patch: sanitize input handling in
      sftp_parse_longname() in src/sftp.c.
    - debian/patches/CVE-2026-0968-2.patch: reproducer for invalid longname
      data in tests/unittests/CMakeLists.txt,
      tests/unittests/torture_unit_sftp.c.
    - CVE-2026-0968

 -- Marc Deslauriers <email address hidden> Fri, 13 Feb 2026 10:22:49 -0500
Source diff to previous version
CVE-2025-8277 A flaw was found in libssh's handling of key exchange (KEX) processes when a client repeatedly sends incorrect KEX guesses. The library fails to free
CVE-2026-0964 Improper sanitation of paths received from SCP servers
CVE-2026-0965 Denial of Service via improper configuration file handling
CVE-2026-0966 Buffer underflow in ssh_get_hexa() on invalid input
CVE-2026-0967 Denial of Service via inefficient regular expression processing
CVE-2026-0968 Denial of Service due to malformed SFTP message

Version: 0.9.6-2ubuntu0.22.04.5 2025-10-31 04:07:06 UTC

  libssh (0.9.6-2ubuntu0.22.04.5) jammy-security; urgency=medium

  * SECURITY UPDATE: NULL pointer dereference
    - debian/patches/CVE-2025-8114.patch: sets rc to SSH_ERROR prior to goto
      error in ssh_make_sessionid() of src/kex.c.
    - CVE-2025-8114

 -- Ian Constantin <email address hidden> Wed, 29 Oct 2025 14:58:26 +0200
Source diff to previous version
CVE-2025-8114 A flaw was found in libssh, a library that implements the SSH protocol. When calculating the session ID during the key exchange (KEX) process, an all

Version: 0.9.6-2ubuntu0.22.04.4 2025-07-07 19:07:10 UTC

  libssh (0.9.6-2ubuntu0.22.04.4) jammy-security; urgency=medium

  * SECURITY UPDATE: Write beyond bounds in binary to base64 conversion
    functions
    - debian/patches/CVE-2025-4877.patch: prevent integer overflow and
      potential OOB.
    - CVE-2025-4877
  * SECURITY UPDATE: Use of uninitialized variable in
    privatekey_from_file()
    - debian/patches/CVE-2025-4878-1.patch: initialize pointers where
      possible.
    - debian/patches/CVE-2025-4878-2.patch: properly check return value to
      avoid NULL pointer dereference.
    - CVE-2025-4878
  * SECURITY UPDATE: OOB read in sftp_handle function
    - debian/patches/CVE-2025-5318.patch: fix possible buffer overrun.
    - CVE-2025-5318
  * SECURITY UPDATE: ssh_kdf() returns a success code on certain failures
    - debian/patches/CVE-2025-5372-pre1.patch: Reformat ssh_kdf().
    - debian/patches/CVE-2025-5372.patch: simplify error checking and
      handling of return codes in ssh_kdf().
    - CVE-2025-5372
  * SECURITY UPDATE: Missing packet filter may expose to variant of
    Terrapin attack
    - debian/patches/missing_packet_filter.patch: implement missing packet
      filter for DH GEX.
    - No CVE number

 -- Marc Deslauriers <email address hidden> Wed, 02 Jul 2025 14:48:47 -0400
Source diff to previous version
CVE-2025-5318 A flaw was found in the libssh library. An out-of-bounds read can be triggered in the sftp_handle function due to an incorrect comparison check that
CVE-2025-5372 A flaw was found in libssh versions built with OpenSSL versions older than 3.0, specifically in the ssh_kdf() function responsible for key derivation

Version: 0.9.6-2ubuntu0.22.04.3 2024-01-22 18:07:11 UTC

  libssh (0.9.6-2ubuntu0.22.04.3) jammy-security; urgency=medium

  * SECURITY UPDATE: code injection via ProxyCommand/ProxyJump hostname
    - debian/patches/CVE-2023-6004-*.patch: validate hostnames.
    - CVE-2023-6004
  * SECURITY UPDATE: DoS via incorrect return value checks
    - debian/patches/CVE-2023-6918-*.patch: check return values.
    - CVE-2023-6918

 -- Marc Deslauriers <email address hidden> Thu, 11 Jan 2024 07:44:15 -0500
Source diff to previous version
CVE-2023-6004 A flaw was found in libssh. By utilizing the ProxyCommand or ProxyJump feature, users can exploit unchecked hostname syntax on the client. This issue
CVE-2023-6918 A flaw was found in the libssh implements abstract layer for message digest (MD) operations implemented by different supported crypto backends. The r

Version: 0.9.6-2ubuntu0.22.04.2 2023-12-19 17:07:38 UTC

  libssh (0.9.6-2ubuntu0.22.04.2) jammy-security; urgency=medium

  * SECURITY UPDATE: Prefix truncation attack on BPP
    - debian/patches/CVE-2023-48795-1.patch: add client side mitigation.
    - debian/patches/CVE-2023-48795-2.patch: add server side mitigations.
    - debian/patches/CVE-2023-48795-3.patch: strip extensions from both kex
      lists for matching.
    - debian/patches/CVE-2023-48795-4.patch: tests: adjust calculation to
      strict kex.
    - CVE-2023-48795

 -- Marc Deslauriers <email address hidden> Mon, 18 Dec 2023 17:30:05 -0500
CVE-2023-48795 The SSH transport protocol with certain OpenSSH extensions, found in OpenSSH before 9.6 and other products, allows remote attackers to bypass integri


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