All errata/c10f2/ALT-PU-2026-4285-3
ALT-PU-2026-4285-3

Package update libssh in branch c10f2

Version0.11.4-alt1
Task#410771
Published2026-04-15
Max severityCRITICAL
Severity:

Closed issues (12)

BDU:2026-05141
MEDIUM5.0

Уязвимость библиотеки libssh, связанная с неверным ограничением имени пути к каталогу, позволяющая нарушителю получить несанкционированный доступ к защищаемой информации

Published: 2026-04-14Modified: 2026-05-06
CVSS 3.xMEDIUM 5.0
CVSS:3.x/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:L
CVSS 2.0MEDIUM 5.1
CVSS:2.0/AV:N/AC:H/Au:N/C:P/I:P/A:P
References
BDU:2026-05142
MEDIUM6.5

Уязвимость функции ssh_get_hexa() прикладного программного интерфейса библиотеки libssh, позволяющая нарушителю вызвать отказ в обслуживании

Published: 2026-04-14Modified: 2026-05-06
CVSS 3.xMEDIUM 6.5
CVSS:3.x/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L
CVSS 2.0MEDIUM 6.4
CVSS:2.0/AV:N/AC:L/Au:N/C:N/I:P/A:P
References
BDU:2026-05143
CRITICAL9.8

Уязвимость библиотеки libssh, связанная с разыменованием нулевого указателя, позволяющая нарушителю вызвать отказ в обслуживании

Published: 2026-04-14Modified: 2026-05-06
CVSS 3.xCRITICAL 9.8
CVSS:3.x/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS 2.0CRITICAL 10.0
CVSS:2.0/AV:N/AC:L/Au:N/C:C/I:C/A:C
References
BDU:2026-05144
MEDIUM5.5

Уязвимость библиотеки libssh, связанная с использованием регулярного выражения с неэффективной вычислительной сложностью, позволяющая нарушителю вызвать отказ в обслуживании

Published: 2026-04-14Modified: 2026-05-06
CVSS 3.xMEDIUM 5.5
CVSS:3.x/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
CVSS 2.0MEDIUM 4.9
CVSS:2.0/AV:L/AC:L/Au:N/C:N/I:N/A:C
References
BDU:2026-05147
LOW3.3

Уязвимость библиотеки libssh, связанная с некорректным внешним управлением именем или путем файла, позволяющая нарушителю вызвать отказ в обслуживании

Published: 2026-04-14Modified: 2026-05-06
CVSS 3.xLOW 3.3
CVSS:3.x/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
CVSS 2.0LOW 1.7
CVSS:2.0/AV:L/AC:L/Au:S/C:N/I:N/A:P
References
CVE-2025-14821
HIGH7.0

A flaw was found in libssh. This vulnerability allows local man-in-the-middle attacks, security downgrades of SSH (Secure Shell) connections, and manipulation of trusted host information, posing a significant risk to the confidentiality, integrity, and availability of SSH communications via an insecure default configuration on Windows systems where the library automatically loads configuration files from the C:\etc directory, which can be created and modified by unprivileged local users.

Published: 2026-04-07Modified: 2026-04-29
CVSS 3.xHIGH 7.0
CVSS:3.x/CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
References
CVE-2026-0964
MEDIUM6.3

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.

Published: 2026-03-26Modified: 2026-04-30
CVSS 3.xMEDIUM 6.3
CVSS:3.x/CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L
References
CVE-2026-0965
LOW3.3

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.

Published: 2026-03-26Modified: 2026-04-02
CVSS 3.xLOW 3.3
CVSS:3.x/CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
References
CVE-2026-0966
HIGH8.2

The API function `ssh_get_hexa()` is vulnerable, when 0-lenght input is provided to this function. This function is used internally in `ssh_get_fingerprint_hash()` and `ssh_print_hexa()` (deprecated), which is vulnerable to the same input (length is provided by the calling application). The function is also used internally in the gssapi code for logging the OIDs received by the server during GSSAPI authentication. This could be triggered remotely, when the server allows GSSAPI authentication and logging verbosity is set at least to SSH_LOG_PACKET (3). This could cause self-DoS of the per-connection daemon process.

Published: 2026-03-26Modified: 2026-04-30
CVSS 3.xHIGH 8.2
CVSS:3.x/CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H
References
CVE-2026-0967
MEDIUM5.5

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.

Published: 2026-03-26Modified: 2026-04-02
CVSS 3.xMEDIUM 5.5
CVSS:3.x/CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
References
CVE-2026-0968
LOW3.1

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.

Published: 2026-03-26Modified: 2026-04-13
CVSS 3.xLOW 3.1
CVSS:3.x/CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:N/A:L
References
CVE-2026-3731
MEDIUM6.9

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.

Published: 2026-03-08Modified: 2026-03-12
CVSS 2.0MEDIUM 5.0
CVSS:2.0/AV:N/AC:L/Au:N/C:N/I:N/A:P
CVSS 3.xHIGH 7.5
CVSS:3.x/CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS 4.0MEDIUM 6.9
CVSS:4.0/CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
References