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.
CVSS Details
- CVSS 4.0 Base Score: 6.9 (MEDIUM)
- CVSS 4.0 Vector: (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)
- CVSS 3.1 Base Score: 5.3
- CVSS 3.1 Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H)
Covered by Rapid7
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Amazon_linux_2023 | — | Upgrade libssh-debugsourceUpgrade libssh-develUpgrade libssh-debuginfoUpgrade libsshUpgrade libssh-config | Jun 9, 2026 | Mar 8, 2026 |
| Debian | — | Upgrade libssh | Aug 3, 2026 | Aug 3, 2026 |
| Redhat_linux | — | No solution exists | Jul 17, 2026 | Mar 8, 2026 |
| Suse | — | Upgrade libssh-devel-docUpgrade libssh-configUpgrade libssh4Upgrade libssh4-32bitUpgrade libssh-devel | Apr 15, 2026 | Mar 20, 2026 |
| Ubuntu | — | Upgrade libssh-gcrypt-4Upgrade libssh-gcrypt-4 (Ubuntu Pro)Upgrade libssh-4Upgrade libssh-4 (Ubuntu Pro) | Mar 18, 2026 | Mar 8, 2026 |
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