CVE-2025-5372
Fixed in a distro release EPSS <1%CVSS 5.0
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. Due to inconsistent interpretation of return values where OpenSSL uses 0 to indicate failure and libssh uses 0 for success—the function may mistakenly return a success status even when key derivation fails. This results in uninitialized cryptographic key buffers being used in subsequent communication, potentially compromising SSH sessions' confidentiality, integrity, and availability.
Products: libssh, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support, Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On, Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support, Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On, Red Hat Enterprise Linux 8.8 Telecommunications Update Service, Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions, Red Hat Enterprise Linux 9.0 Update Services for SAP Solutions, Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 6, Red Hat Enterprise Linux 7, Red Hat Enterprise Linux 9, Red Hat OpenShift Container Platform 4
Distro releases
| Release | Package | Fixed in |
|---|---|---|
| AlmaLinux 8 | libssh | 0.9.6-16.el8_10 |
| AlmaLinux 8 | libssh-config | 0.9.6-16.el8_10 |
| AlmaLinux 8 | libssh-devel | 0.9.6-16.el8_10 |
| Debian 11 | libssh | 0.9.8-0+deb11u2 |
| Debian 12 | libssh | 0.10.6-0+deb12u2 |
| Debian 13 | libssh | 0.11.2-1 |
| Debian 14 | libssh | 0.11.2-1 |
| Red Hat Enterprise Linux 8 | libssh | 0:0.9.6-16.el8_10 |
| Red Hat Enterprise Linux 8 | libssh-config | 0:0.9.6-16.el8_10 |
| Red Hat Enterprise Linux 8 | libssh-debuginfo | 0:0.9.6-16.el8_10 |
| Red Hat Enterprise Linux 8 | libssh-debugsource | 0:0.9.6-16.el8_10 |
| Red Hat Enterprise Linux 8 | libssh-devel | 0:0.9.6-16.el8_10 |
| Red Hat rhel aus 8.4 | libssh | 0:0.9.4-2.el8_4.2 |
| Red Hat rhel aus 8.4 | libssh-config | 0:0.9.4-2.el8_4.2 |
| Red Hat rhel aus 8.4 | libssh-debuginfo | 0:0.9.4-2.el8_4.2 |
| Red Hat rhel aus 8.4 | libssh-debugsource | 0:0.9.4-2.el8_4.2 |
| Red Hat rhel aus 8.4 | libssh-devel | 0:0.9.4-2.el8_4.2 |
| Red Hat rhel aus 8.6 | libssh | 0:0.9.6-4.el8_6.2 |
| Red Hat rhel aus 8.6 | libssh-config | 0:0.9.6-4.el8_6.2 |
| Red Hat rhel aus 8.6 | libssh-debuginfo | 0:0.9.6-4.el8_6.2 |
| Red Hat rhel aus 8.6 | libssh-debugsource | 0:0.9.6-4.el8_6.2 |
| Red Hat rhel aus 8.6 | libssh-devel | 0:0.9.6-4.el8_6.2 |
| Red Hat rhel e4s 8.8 | libssh | 0:0.9.6-13.el8_8.2 |
| Red Hat rhel e4s 8.8 | libssh-config | 0:0.9.6-13.el8_8.2 |
| Red Hat rhel e4s 8.8 | libssh-debuginfo | 0:0.9.6-13.el8_8.2 |
| Red Hat rhel e4s 8.8 | libssh-debugsource | 0:0.9.6-13.el8_8.2 |
| Red Hat rhel e4s 8.8 | libssh-devel | 0:0.9.6-13.el8_8.2 |
| Red Hat rhel e4s 9.0 | libssh | 0:0.9.6-3.el9_0.2 |
| Red Hat rhel e4s 9.0 | libssh-config | 0:0.9.6-3.el9_0.2 |
| Red Hat rhel e4s 9.0 | libssh-debuginfo | 0:0.9.6-3.el9_0.2 |
| Red Hat rhel e4s 9.0 | libssh-debugsource | 0:0.9.6-3.el9_0.2 |
| Red Hat rhel e4s 9.0 | libssh-devel | 0:0.9.6-3.el9_0.2 |
| Red Hat rhel eus long life 8.4 | libssh | 0:0.9.4-2.el8_4.2 |
| Red Hat rhel eus long life 8.4 | libssh-config | 0:0.9.4-2.el8_4.2 |
| Red Hat rhel eus long life 8.4 | libssh-debuginfo | 0:0.9.4-2.el8_4.2 |
| Red Hat rhel eus long life 8.4 | libssh-debugsource | 0:0.9.4-2.el8_4.2 |
| Red Hat rhel eus long life 8.4 | libssh-devel | 0:0.9.4-2.el8_4.2 |
| Red Hat rhel eus long life 8.6 | libssh | 0:0.9.6-4.el8_6.2 |
| Red Hat rhel eus long life 8.6 | libssh-config | 0:0.9.6-4.el8_6.2 |
| Red Hat rhel eus long life 8.6 | libssh-debuginfo | 0:0.9.6-4.el8_6.2 |
| Red Hat rhel eus long life 8.6 | libssh-debugsource | 0:0.9.6-4.el8_6.2 |
| Red Hat rhel eus long life 8.6 | libssh-devel | 0:0.9.6-4.el8_6.2 |
| Red Hat rhel tus 8.8 | libssh | 0:0.9.6-13.el8_8.2 |
| Red Hat rhel tus 8.8 | libssh-config | 0:0.9.6-13.el8_8.2 |
| Red Hat rhel tus 8.8 | libssh-debuginfo | 0:0.9.6-13.el8_8.2 |
| Red Hat rhel tus 8.8 | libssh-debugsource | 0:0.9.6-13.el8_8.2 |
| Red Hat rhel tus 8.8 | libssh-devel | 0:0.9.6-13.el8_8.2 |
| Rocky Linux 8 | libssh | 0:0.9.6-16.el8_10 |
| SUSE Enterprise Storage 7.1 | libssh | 0.9.8-150200.13.9.1 |
| SUSE Linux Enterprise High Performance Computing 15 SP3-LTSS | libssh | 0.9.8-150200.13.9.1 |
| SUSE Linux Enterprise High Performance Computing 15 SP4-ESPOS | libssh | 0.9.8-150400.3.9.1 |
| SUSE Linux Enterprise High Performance Computing 15 SP4-LTSS | libssh | 0.9.8-150400.3.9.1 |
| SUSE Linux Enterprise High Performance Computing 15 SP5-ESPOS | libssh | 0.9.8-150400.3.9.1 |
| SUSE Linux Enterprise High Performance Computing 15 SP5-LTSS | libssh | 0.9.8-150400.3.9.1 |
| SUSE Linux Enterprise Micro 5.1 | libssh | 0.9.8-150200.13.9.1 |
| SUSE Linux Enterprise Micro 5.2 | libssh | 0.9.8-150200.13.9.1 |
| SUSE Linux Enterprise Micro 5.3 | libssh | 0.9.8-150400.3.9.1 |
| SUSE Linux Enterprise Micro 5.4 | libssh | 0.9.8-150400.3.9.1 |
| SUSE Linux Enterprise Micro 5.5 | libssh | 0.9.8-150400.3.9.1 |
| SUSE Linux Enterprise Module for Basesystem 15 SP6 | libssh | 0.9.8-150600.11.3.1 |
| SUSE Linux Enterprise Module for Basesystem 15 SP7 | libssh | 0.9.8-150600.11.3.1 |
| SUSE Linux Enterprise Server 12 SP5-LTSS | libssh | 0.9.8-3.15.1 |
| SUSE Linux Enterprise Server 15 SP3-LTSS | libssh | 0.9.8-150200.13.9.1 |
| SUSE Linux Enterprise Server 15 SP4-LTSS | libssh | 0.9.8-150400.3.9.1 |
| SUSE Linux Enterprise Server 15 SP5-LTSS | libssh | 0.9.8-150400.3.9.1 |
| SUSE Linux Enterprise Server LTSS Extended Security 12 SP5 | libssh | 0.9.8-3.15.1 |
| SUSE Linux Enterprise Server for SAP Applications 15 SP3 | libssh | 0.9.8-150200.13.9.1 |
| SUSE Linux Enterprise Server for SAP Applications 15 SP4 | libssh | 0.9.8-150400.3.9.1 |
| SUSE Linux Enterprise Server for SAP Applications 15 SP5 | libssh | 0.9.8-150400.3.9.1 |
| SUSE Linux Micro 6.0 | libssh | 0.10.6-2.1 |
| SUSE Linux Micro 6.1 | libssh | 0.10.6-slfo.1.1_2.1 |
| SUSE Manager Proxy 4.3 | libssh | 0.9.8-150400.3.9.1 |
| SUSE Manager Server 4.3 | libssh | 0.9.8-150400.3.9.1 |
| Ubuntu 22.04 LTS | libssh | 0.9.6-2ubuntu0.22.04.4 |
| Ubuntu 24.04 LTS | libssh | 0.10.6-2ubuntu0.1 |
| Ubuntu Pro 16.04 LTS | libssh | no fix |
| Ubuntu Pro 18.04 LTS | libssh | no fix |
| Ubuntu Pro 20.04 LTS | libssh | no fix |
| openSUSE Leap 15.6 | libssh | 0.9.8-150600.11.3.1 |
| openSUSE Tumbleweed | libssh | 0.11.2-1.1 |