CVE-2023-2283
CVE-2023-2283
Esta página presenta datos de fuentes públicas de vulnerabilidades. Consulta el aviso original antes de actualizar.
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.
CVSS 6.5 · Media · EPSS 1,1% · Corrección disponible
- Publicación
- Actualización
Pila tecnológica: system
Productos y versiones afectados
libssh
- Versiones
- libssh-2: Afectada
Sin corrección publicada
libssh Debian:12
- Intervalos de versiones afectados
- ECOSYSTEM: < 0.10.5-1
Actualiza a 0.10.5-1
libssh Debian:13
- Intervalos de versiones afectados
- ECOSYSTEM: < 0.10.5-1
Actualiza a 0.10.5-1
libssh Debian:14
- Intervalos de versiones afectados
- ECOSYSTEM: < 0.10.5-1
Actualiza a 0.10.5-1
libssh Ubuntu:20.04:LTS
- Versiones
- 0.9.0-1ubuntu1
- 0.9.0-1ubuntu4
- 0.9.0-1ubuntu5
- 0.9.3-2ubuntu1
- 0.9.3-2ubuntu2
- 0.9.3-2ubuntu2.1
- 0.9.3-2ubuntu2.2
- Intervalos de versiones afectados
- ECOSYSTEM: < 0.9.3-2ubuntu2.3
Actualiza a 0.9.3-2ubuntu2.3
libssh Ubuntu:22.04:LTS
- Versiones
- 0.9.6-1
- 0.9.6-1build1
- 0.9.6-2
- 0.9.6-2build1
- Intervalos de versiones afectados
- ECOSYSTEM: < 0.9.6-2ubuntu0.22.04.1
Actualiza a 0.9.6-2ubuntu0.22.04.1
Fuentes originales
- https://access.redhat.com/security/cve/CVE-2023-2283
- https://www.libssh.org/security/advisories/CVE-2023-2283.txt
- https://bugzilla.redhat.com/show_bug.cgi?id=2189736
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/27PD44ALQTZXX7K6JAM3BXBUHYA6DFFN/
- http://packetstormsecurity.com/files/172861/libssh-0.9.6-0.10.4-pki_verify_data_signature-Authorization-Bypass.html
- https://security.gentoo.org/glsa/202312-05
- https://security.netapp.com/advisory/ntap-20240201-0005/
- http://seclists.org/fulldisclosure/2025/Feb/18
- https://nvd.nist.gov/vuln/detail/CVE-2023-2283