CVE catalog
CVE-2023-2283
libssh: CVE-2023-2283
- Severity
- Medium · CVSS 4.8
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N - Published
- Source
- [NVD] · [CVE record]
- EPSS
- 1.06% · Oct 27, 2026
A vulnerability was found in libssh, where the authentication check of the connecting client can be bypassed in the`pki_verify_data_signature` function in memory allocation problems. This issue may happen if there is insufficient memory or the memory usage is limited. The problem is caused by the return value `rc,` which is initialized to SSH_ERROR and later rewritten to save the return value of the function call `pki_key_check_hash_compatible.` The value of the variable is not changed between this point and the cryptographic verification. Therefore any error between them calls `goto error` returning SSH_OK.
Vulnerable and fixed packages
Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.
| Distribution | Package | Release | Version | Status |
|---|---|---|---|---|
| Debian | libssh | sid | 0.12.2-1 | fixed |
| Debian | libssh | forky | 0.12.2-1 | fixed |
| Debian | libssh | trixie | 0.11.5-0+deb13u1 | fixed |
| Debian | libssh | trixie-security | 0.11.5-0+deb13u1 | fixed |
| Debian | libssh | bookworm | 0.10.6-0+deb12u2 | fixed |
| Debian | libssh | bookworm-security | 0.10.6-0+deb12u3 | fixed |
| Ubuntu | libssh | 20.04 | 0.9.0-1ubuntu1 | vulnerable |
| Ubuntu | libssh | 20.04 | 0.9.0-1ubuntu4 | vulnerable |
| Ubuntu | libssh | 20.04 | 0.9.0-1ubuntu5 | vulnerable |
| Ubuntu | libssh | 20.04 | 0.9.3-2ubuntu1 | vulnerable |
| Ubuntu | libssh | 20.04 | 0.9.3-2ubuntu2 | vulnerable |
| Ubuntu | libssh | 20.04 | 0.9.3-2ubuntu2.1 | vulnerable |
| Ubuntu | libssh | 20.04 | 0.9.3-2ubuntu2.2 | vulnerable |
| Ubuntu | libssh | 20.04 | 0.9.3-2ubuntu2.3 | fixed |
| Ubuntu | libssh | 22.04 | 0.9.6-1 | vulnerable |
| Ubuntu | libssh | 22.04 | 0.9.6-1build1 | vulnerable |
| Ubuntu | libssh | 22.04 | 0.9.6-2 | vulnerable |
| Ubuntu | libssh | 22.04 | 0.9.6-2build1 | vulnerable |
| Ubuntu | libssh | 22.04 | 0.9.6-2ubuntu0.22.04.1 | fixed |
Fixed-version evidence
| Distribution | Package | Type | Release | Fixed version | Urgency | Origin | Bugs |
|---|---|---|---|---|---|---|---|
| Debian | libssh | source | sid | 0.10.5-1 | not yet assigned | Not reported | [1035832] |
| Debian | libssh | source | forky | 0.10.5-1 | not yet assigned | Not reported | [1035832] |
| Debian | libssh | source | trixie | 0.10.5-1 | not yet assigned | Not reported | [1035832] |
| Debian | libssh | source | bookworm | 0.10.5-1 | not yet assigned | Not reported | [1035832] |
| Ubuntu | libssh | deb | 20.04 | 0.9.3-2ubuntu2.3 | Not reported | UBUNTU-CVE-2023-2283 | Not reported |
| Ubuntu | libssh | deb | 22.04 | 0.9.6-2ubuntu0.22.04.1 | Not reported | UBUNTU-CVE-2023-2283 | Not reported |
OpenFactory catalog packages
[Debian 12 (Bookworm)]
- [libssh-4]Fixed
Source package: [libssh]
Details (4)
0.10.6-0+deb12u2· amd64 · bookwormFixed · Fixed:
0.10.5-1dsa · libssh · debian · bookworm; dsa · libssh · debian · 12
0.10.6-0+deb12u2· arm64 · bookwormFixed · Fixed:
0.10.5-1dsa · libssh · debian · bookworm; dsa · libssh · debian · 12
0.10.6-0+deb12u1· amd64 · bookworm-securityFixed · Fixed:
0.10.5-1dsa · libssh · debian · bookworm; dsa · libssh · debian · 12
0.10.6-0+deb12u1· arm64 · bookworm-securityFixed · Fixed:
0.10.5-1dsa · libssh · debian · bookworm; dsa · libssh · debian · 12
- [libssh-dev]Fixed
Source package: [libssh]
Details (4)
0.10.6-0+deb12u2· amd64 · bookwormFixed · Fixed:
0.10.5-1dsa · libssh · debian · bookworm; dsa · libssh · debian · 12
0.10.6-0+deb12u2· arm64 · bookwormFixed · Fixed:
0.10.5-1dsa · libssh · debian · bookworm; dsa · libssh · debian · 12
0.10.6-0+deb12u1· amd64 · bookworm-securityFixed · Fixed:
0.10.5-1dsa · libssh · debian · bookworm; dsa · libssh · debian · 12
0.10.6-0+deb12u1· arm64 · bookworm-securityFixed · Fixed:
0.10.5-1dsa · libssh · debian · bookworm; dsa · libssh · debian · 12
- [libssh-doc]Fixed
Source package: [libssh]
Details (4)
0.10.6-0+deb12u2· all · bookwormFixed · Fixed:
0.10.5-1dsa · libssh · debian · bookworm; dsa · libssh · debian · 12
0.10.6-0+deb12u2· all · bookwormFixed · Fixed:
0.10.5-1dsa · libssh · debian · bookworm; dsa · libssh · debian · 12
0.10.6-0+deb12u1· all · bookworm-securityFixed · Fixed:
0.10.5-1dsa · libssh · debian · bookworm; dsa · libssh · debian · 12
0.10.6-0+deb12u1· all · bookworm-securityFixed · Fixed:
0.10.5-1dsa · libssh · debian · bookworm; dsa · libssh · debian · 12
- [libssh-gcrypt-4]Fixed
Source package: [libssh]
Details (4)
0.10.6-0+deb12u2· amd64 · bookwormFixed · Fixed:
0.10.5-1dsa · libssh · debian · bookworm; dsa · libssh · debian · 12
0.10.6-0+deb12u2· arm64 · bookwormFixed · Fixed:
0.10.5-1dsa · libssh · debian · bookworm; dsa · libssh · debian · 12
0.10.6-0+deb12u1· amd64 · bookworm-securityFixed · Fixed:
0.10.5-1dsa · libssh · debian · bookworm; dsa · libssh · debian · 12
0.10.6-0+deb12u1· arm64 · bookworm-securityFixed · Fixed:
0.10.5-1dsa · libssh · debian · bookworm; dsa · libssh · debian · 12
- [libssh-gcrypt-dev]Fixed
Source package: [libssh]
Details (4)
0.10.6-0+deb12u2· amd64 · bookwormFixed · Fixed:
0.10.5-1dsa · libssh · debian · bookworm; dsa · libssh · debian · 12
0.10.6-0+deb12u2· arm64 · bookwormFixed · Fixed:
0.10.5-1dsa · libssh · debian · bookworm; dsa · libssh · debian · 12
0.10.6-0+deb12u1· amd64 · bookworm-securityFixed · Fixed:
0.10.5-1dsa · libssh · debian · bookworm; dsa · libssh · debian · 12
0.10.6-0+deb12u1· arm64 · bookworm-securityFixed · Fixed:
0.10.5-1dsa · libssh · debian · bookworm; dsa · libssh · debian · 12
[Debian 13 (Trixie)]
- [libssh-4]Fixed
Source package: [libssh]
Details (4)
0.11.2-1+deb13u1· amd64 · trixieFixed · Fixed:
0.10.5-1dsa · libssh · debian · 13
0.11.2-1+deb13u1· arm64 · trixieFixed · Fixed:
0.10.5-1dsa · libssh · debian · 13
0.11.5-0+deb13u1· amd64 · trixie-securityFixed · Fixed:
0.10.5-1dsa · libssh · debian · 13
0.11.5-0+deb13u1· arm64 · trixie-securityFixed · Fixed:
0.10.5-1dsa · libssh · debian · 13
- [libssh-dev]Fixed
Source package: [libssh]
Details (4)
0.11.2-1+deb13u1· amd64 · trixieFixed · Fixed:
0.10.5-1dsa · libssh · debian · 13
0.11.2-1+deb13u1· arm64 · trixieFixed · Fixed:
0.10.5-1dsa · libssh · debian · 13
0.11.5-0+deb13u1· amd64 · trixie-securityFixed · Fixed:
0.10.5-1dsa · libssh · debian · 13
0.11.5-0+deb13u1· arm64 · trixie-securityFixed · Fixed:
0.10.5-1dsa · libssh · debian · 13
- [libssh-doc]Fixed
Source package: [libssh]
Details (4)
0.11.2-1+deb13u1· all · trixieFixed · Fixed:
0.10.5-1dsa · libssh · debian · 13
0.11.2-1+deb13u1· all · trixieFixed · Fixed:
0.10.5-1dsa · libssh · debian · 13
0.11.5-0+deb13u1· all · trixie-securityFixed · Fixed:
0.10.5-1dsa · libssh · debian · 13
0.11.5-0+deb13u1· all · trixie-securityFixed · Fixed:
0.10.5-1dsa · libssh · debian · 13
Observed:
References
- [https://ftp.suse.com/pub/projects/security/csaf/rhsa-2023_3839.json]
- [https://osv.dev/vulnerability/DEBIAN-CVE-2023-2283]
- [https://osv.dev/vulnerability/UBUNTU-CVE-2023-2283]
- [https://security-tracker.debian.org/tracker/CVE-2023-2283]
- [https://security.access.redhat.com/data/csaf/v2/vex/2023/cve-2023-2283.json]
- [https://wid.cert-bund.de/.well-known/csaf/white/2023/wid-sec-w-2023-2112.json]
[CERT-Bund public advisories] · [Debian Security Tracker] · [FIRST EPSS] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX] · [SUSE security advisories and VEX]