pam_ssh 1.92 and possibly other versions, as used when PAM is compiled with USE=ssh, generates different error messages depending on whether the username is valid or invalid, which makes it easier for remote attackers to enumerate usernames.
Product
debian/libpam-ssh vulnerabilities
2 published CVES affecting debian/libpam-ssh, from public sources (CVE.org, NVD, CISA KEV, FIRST EPSS, OSV).
- Total
- 2
- Critical
- 0
- High
- 0
- Medium
- 2
- Low
- 0
- Unscored
- 0
- CISA KEV
- 0
Latest debian/libpam-ssh CVEs
Newest publication first
-
MediumCVSS 5.0 EPSS 1.3%
-
MediumCVSS 6.4 EPSS 0.88%
The auth_via_key function in pam_ssh.c in pam_ssh before 1.92, when the allow_blank_passphrase option is disabled, allows remote attackers to bypass authentication restrictions and use private encryption keys requiring a blank passphrase by entering a non-blank passphrase.
Sources: CVE.org, NVD, CISA KEV, FIRST EPSS, OSV and public exploit-reference metadata. Product matching comes from the published CVE records. A proof-of-concept means public code exists; it is not evidence of exploitation.