libssh - Debian Package Tracker

general

source: libssh (main)
version: 0.12.0-3
maintainer: Laurent Bigonville (DMD)
uploaders: Martin Pitt [DMD] – Mike Gabriel [DMD]
arch: all any
std-ver: 4.7.3
VCS: Git (Browse, QA)

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

[pool directory]

o-o-stable: 0.9.8-0+deb11u1
o-o-sec: 0.9.8-0+deb11u2
oldstable: 0.10.6-0+deb12u2
old-sec: 0.10.6-0+deb12u1
stable: 0.11.2-1+deb13u1
testing: 0.12.0-3
unstable: 0.12.0-3

versioned links

0.9.8-0+deb11u1: [.dsc, use dget on this link to retrieve source package] [changelog] [copyright] [rules] [control]
0.9.8-0+deb11u2: [.dsc, use dget on this link to retrieve source package] [changelog] [copyright] [rules] [control]
0.10.6-0+deb12u1: [.dsc, use dget on this link to retrieve source package] [changelog] [copyright] [rules] [control]
0.10.6-0+deb12u2: [.dsc, use dget on this link to retrieve source package] [changelog] [copyright] [rules] [control]
0.11.2-1+deb13u1: [.dsc, use dget on this link to retrieve source package] [changelog] [copyright] [rules] [control]
0.12.0-3: [.dsc, use dget on this link to retrieve source package] [changelog] [copyright] [rules] [control]

binaries

libssh-4 (2 bugs: 0, 2, 0, 0)
libssh-dev
libssh-doc

action needed

Problems while searching for a new upstream version high

uscan had problems while searching for a new upstream version:

In watch file debian/watch, reading webpage
  https://www.libssh.org/files/ failed: 500 Can't connect to www.libssh.org:443 (Connection refused)

Created: 2026-07-17 Last update: 2026-07-19 16:50

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Either you need to push your commits and/or your tags, or the information about the package's VCS are out of date.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: 2026-03-19 Last update: 2026-07-19 00:02

4 security issues in buster high

There are 4 open security issues in buster.

3 important issues:

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 may allow an attacker to inject malicious code into the command of the features mentioned through the hostname parameter.
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 return values from these were not properly checked, which could cause low-memory situations failures, NULL dereferences, crashes, or usage of the uninitialized memory as an input for the KDF. In this case, non-matching keys will result in decryption/integrity failures, terminating the connection.
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 integrity checks such that some packets are omitted (from the extension negotiation message), and a client and server may consequently end up with a connection for which some security features have been downgraded or disabled, aka a Terrapin attack. This occurs because the SSH Binary Packet Protocol (BPP), implemented by these extensions, mishandles the handshake phase and mishandles use of sequence numbers. For example, there is an effective attack against SSH's use of ChaCha20-Poly1305 (and CBC with Encrypt-then-MAC). The bypass occurs in chacha20-poly1305@openssh.com and (if CBC is used) the -etm@openssh.com MAC algorithms. This also affects Maverick Synergy Java SSH API before 3.1.0-SNAPSHOT, Dropbear through 2022.83, Ssh before 5.1.1 in Erlang/OTP, PuTTY before 0.80, AsyncSSH before 2.14.2, golang.org/x/crypto before 0.17.0, libssh before 0.10.6, libssh2 through 1.11.0, Thorn Tech SFTP Gateway before 3.4.6, Tera Term before 5.1, Paramiko before 3.4.0, jsch before 0.2.15, SFTPGo before 2.5.6, Netgate pfSense Plus through 23.09.1, Netgate pfSense CE through 2.7.2, HPN-SSH through 18.2.0, ProFTPD before 1.3.8b (and before 1.3.9rc2), ORYX CycloneSSH before 2.3.4, NetSarang XShell 7 before Build 0144, CrushFTP before 10.6.0, ConnectBot SSH library before 2.2.22, Apache MINA sshd through 2.11.0, sshj through 0.37.0, TinySSH through 20230101, trilead-ssh2 6401, LANCOM LCOS and LANconfig, FileZilla before 3.66.4, Nova before 11.8, PKIX-SSH before 14.4, SecureCRT before 9.4.3, Transmit5 before 5.10.4, Win32-OpenSSH before 9.5.0.0p1-Beta, WinSCP before 6.2.2, Bitvise SSH Server before 9.32, Bitvise SSH Client before 9.33, KiTTY through 0.76.1.13, the net-ssh gem 7.2.0 for Ruby, the mscdex ssh2 module before 1.15.0 for Node.js, the thrussh library before 0.35.1 for Rust, and the Russh crate before 0.40.2 for Rust.

1 issue postponed or untriaged:

CVE-2020-16135: (needs triaging) libssh 0.9.4 has a NULL pointer dereference in tftpserver.c if ssh_buffer_new returns NULL.

Created: 2023-12-18 Last update: 2024-06-05 05:37

6 low-priority security issues in trixie low

There are 6 open security issues in trixie.

6 issues left for the package maintainer to handle:

CVE-2026-0964: (needs triaging) A malicious SCP server can send unexpected paths that could make the client application override local files outside of working directory. This could be misused to create malicious executable or configuration files and make the user execute them under specific consequences. This is the same issue as in OpenSSH, tracked as CVE-2019-6111.
CVE-2026-0965: (needs triaging) A flaw was found in libssh where it can attempt to open arbitrary files during configuration parsing. A local attacker can exploit this by providing a malicious configuration file or when the system is misconfigured. This vulnerability could lead to a Denial of Service (DoS) by causing the system to try and access dangerous files, such as block devices or large system files, which can disrupt normal operations.
CVE-2026-0966: (needs triaging) A flaw was found in libssh. The API function `ssh_get_hexa()` is vulnerable to a denial of service when processing zero-length input. This can be exploited remotely by an attacker during GSSAPI (Generic Security Service Application Program Interface) authentication if the server's logging verbosity is set to `SSH_LOG_PACKET (3)` or higher. Successful exploitation could lead to a self-Denial of Service of the per-connection daemon process.
CVE-2026-0967: (needs triaging) A flaw was found in libssh. A remote attacker, by controlling client configuration files or known_hosts files, could craft specific hostnames that when processed by the `match_pattern()` function can lead to inefficient regular expression backtracking. This can cause timeouts and resource exhaustion, resulting in a Denial of Service (DoS) for the client.
CVE-2026-0968: (needs triaging) A flaw was found in libssh in which a malicious SFTP (SSH File Transfer Protocol) server can exploit this by sending a malformed 'longname' field within an `SSH_FXP_NAME` message during a file listing operation. This missing null check can lead to reading beyond allocated memory on the heap. This can cause unexpected behavior or lead to a denial of service (DoS) due to application crashes.
CVE-2026-3731: (needs triaging) A weakness has been identified in libssh up to 0.11.3. The impacted element is the function sftp_extensions_get_name/sftp_extensions_get_data of the file src/sftp.c of the component SFTP Extension Name Handler. Executing a manipulation of the argument idx can lead to out-of-bounds read. The attack may be performed from remote. Upgrading to version 0.11.4 and 0.12.0 is sufficient to resolve this issue. This patch is called 855a0853ad3abd4a6cd85ce06fce6d8d4c7a0b60. You should upgrade the affected component.

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

Created: 2026-02-11 Last update: 2026-05-12 06:03

6 low-priority security issues in bookworm low

There are 6 open security issues in bookworm.

6 issues left for the package maintainer to handle:

CVE-2026-0964: (needs triaging) A malicious SCP server can send unexpected paths that could make the client application override local files outside of working directory. This could be misused to create malicious executable or configuration files and make the user execute them under specific consequences. This is the same issue as in OpenSSH, tracked as CVE-2019-6111.
CVE-2026-0965: (needs triaging) A flaw was found in libssh where it can attempt to open arbitrary files during configuration parsing. A local attacker can exploit this by providing a malicious configuration file or when the system is misconfigured. This vulnerability could lead to a Denial of Service (DoS) by causing the system to try and access dangerous files, such as block devices or large system files, which can disrupt normal operations.
CVE-2026-0966: (needs triaging) A flaw was found in libssh. The API function `ssh_get_hexa()` is vulnerable to a denial of service when processing zero-length input. This can be exploited remotely by an attacker during GSSAPI (Generic Security Service Application Program Interface) authentication if the server's logging verbosity is set to `SSH_LOG_PACKET (3)` or higher. Successful exploitation could lead to a self-Denial of Service of the per-connection daemon process.
CVE-2026-0967: (needs triaging) A flaw was found in libssh. A remote attacker, by controlling client configuration files or known_hosts files, could craft specific hostnames that when processed by the `match_pattern()` function can lead to inefficient regular expression backtracking. This can cause timeouts and resource exhaustion, resulting in a Denial of Service (DoS) for the client.
CVE-2026-0968: (needs triaging) A flaw was found in libssh in which a malicious SFTP (SSH File Transfer Protocol) server can exploit this by sending a malformed 'longname' field within an `SSH_FXP_NAME` message during a file listing operation. This missing null check can lead to reading beyond allocated memory on the heap. This can cause unexpected behavior or lead to a denial of service (DoS) due to application crashes.
CVE-2026-3731: (needs triaging) A weakness has been identified in libssh up to 0.11.3. The impacted element is the function sftp_extensions_get_name/sftp_extensions_get_data of the file src/sftp.c of the component SFTP Extension Name Handler. Executing a manipulation of the argument idx can lead to out-of-bounds read. The attack may be performed from remote. Upgrading to version 0.11.4 and 0.12.0 is sufficient to resolve this issue. This patch is called 855a0853ad3abd4a6cd85ce06fce6d8d4c7a0b60. You should upgrade the affected component.

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

Created: 2026-02-11 Last update: 2026-05-12 06:03

debian/patches: 1 patch to forward upstream low

Among the 3 debian patches available in version 0.12.0-3 of the package, we noticed the following issues:

1 patch 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: 2026-03-19 20:30

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 4.7.3).

Created: 2026-03-31 Last update: 2026-03-31 15:01

testing migrations

This package will soon be part of the auto-openssl transition. You might want to ensure that your package is ready for it. You can probably find supplementary information in the debian-release archives or in the corresponding release.debian.org bug.

news

[rss feed]

[2026-03-29] libssh 0.12.0-3 MIGRATED to testing (Debian testing watch)
[2026-03-19] Accepted libssh 0.12.0-3 (source) into unstable (Martin Pitt)
[2026-03-19] Accepted libssh 0.12.0-2 (source) into unstable (Martin Pitt)
[2026-03-15] Accepted libssh 0.12.0-1 (source) into unstable (Martin Pitt)
[2025-12-06] Accepted libssh 0.10.6-0+deb12u2 (source) into oldstable-proposed-updates (Debian FTP Masters) (signed by: Emilio Pozuelo Monfort)
[2025-11-27] Accepted libssh 0.9.8-0+deb11u2 (source) into oldoldstable-security (Emilio Pozuelo Monfort)
[2025-11-07] Accepted libssh 0.11.2-1+deb13u1 (source) into proposed-updates (Debian FTP Masters) (signed by: Moritz Mühlenhoff)
[2025-09-16] libssh 0.11.3-1 MIGRATED to testing (Debian testing watch)
[2025-09-14] Accepted libssh 0.11.3-1 (source) into unstable (Martin Pitt)
[2025-07-06] libssh 0.11.2-1 MIGRATED to testing (Debian testing watch)
[2025-06-28] Accepted libssh 0.11.2-1 (source) into unstable (Martin Pitt)
[2025-05-02] libssh 0.11.1-2 MIGRATED to testing (Debian testing watch)
[2025-04-22] Accepted libssh 0.11.1-2 (source) into unstable (Martin Pitt)
[2024-09-09] libssh 0.11.1-1 MIGRATED to testing (Debian testing watch)
[2024-09-04] Accepted libssh 0.11.1-1 (source) into unstable (Martin Pitt)
[2024-06-05] libssh 0.10.6-3 MIGRATED to testing (Debian testing watch)
[2024-06-03] Accepted libssh 0.10.6-3 (source) into unstable (Martin Pitt)
[2023-12-29] Accepted libssh 0.9.8-0+deb11u1 (source) into oldstable-proposed-updates (Debian FTP Masters) (signed by: Martin Pitt)
[2023-12-29] Accepted libssh 0.10.6-0+deb12u1 (source) into proposed-updates (Debian FTP Masters) (signed by: Martin Pitt)
[2023-12-28] Accepted libssh 0.9.8-0+deb11u1 (source) into oldstable-security (Debian FTP Masters) (signed by: Martin Pitt)
[2023-12-28] Accepted libssh 0.10.6-0+deb12u1 (source) into stable-security (Debian FTP Masters) (signed by: Martin Pitt)
[2023-12-25] libssh 0.10.6-2 MIGRATED to testing (Debian testing watch)
[2023-12-22] Accepted libssh 0.10.6-2 (source) into unstable (Martin Pitt)
[2023-12-22] Accepted libssh 0.10.6-1 (source) into unstable (Martin Pitt)
[2023-08-21] libssh 0.10.5-3 MIGRATED to testing (Debian testing watch)
[2023-08-18] Accepted libssh 0.10.5-3 (source) into unstable (Martin Pitt)
[2023-05-29] Accepted libssh 0.8.7-1+deb10u2 (source) into oldstable (Tobias Frost)
[2023-05-28] Accepted libssh 0.9.7-0+deb11u1 (source) into proposed-updates (Debian FTP Masters) (signed by: Martin Pitt)
[2023-05-23] Accepted libssh 0.9.7-0+deb11u1 (source) into stable-security (Debian FTP Masters) (signed by: Martin Pitt)
[2023-05-20] libssh 0.10.5-2 MIGRATED to testing (Debian testing watch)

bugs [bug history graph]

all: 3
RC: 0
I&N: 2
M&W: 1
F&P: 0
patch: 0

links

homepage
lintian
buildd: logs, reproducibility, cross
popcon
browse source code
other distros
security tracker
debian patches
debci

ubuntu

[Information about Ubuntu for Debian Developers]

version: 0.12.0-3