CVE-2016-4422
The pam_sm_authenticate function in pam_sshauth.c in libpam-sshauth might allow context-dependent...
The pam_sm_authenticate function in pam_sshauth.c in libpam-sshauth might allow context-dependent attackers to bypass authentication or gain privileges via a system user account.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- High
- Integrity
- High
- Availability
- High
Exploit likelihood
What each source reports
NVD Score used
The pam_sm_authenticate function in pam_sshauth.c in libpam-sshauth might allow context-dependent attackers to bypass authentication or gain privileges via a system user account.
- Record
CVE-2016-4422- CVSS 3.1
- 9.8 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - CVSS 2.0
- 10.0 High
AV:N/AC:L/Au:N/C:C/I:C/A:C - Weakness
- CWE-287
- Updated
- 2026-11-02
CVE List No score
The pam_sm_authenticate function in pam_sshauth.c in libpam-sshauth might allow context-dependent attackers to bypass authentication or gain privileges via a system user account.
- Record
CVE-2016-4422- Updated
- 2026-11-02
EUVDEUVD-2016-5422 No score
The pam_sm_authenticate function in pam_sshauth.c in libpam-sshauth might allow context-dependent attackers to bypass authentication or gain privileges via a system user account.
- Record
EUVD-2016-5422- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-c337-rr2j-g4h6
The pam_sm_authenticate function in pam_sshauth.c in libpam-sshauth might allow context-dependent...
The pam_sm_authenticate function in pam_sshauth.c in libpam-sshauth might allow context-dependent attackers to bypass authentication or gain privileges via a system user account.
- Record
GHSA-c337-rr2j-g4h6- CVSS 3.1
- 9.8 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - Weakness
- CWE-287
- Updated
- 2026-11-02
OSVUBUNTU-CVE-2016-4422
The pam_sm_authenticate function in pam_sshauth.c in libpam-sshauth might allow context-dependent attackers to bypass authentication or gain privileges via a system user account.
- Record
UBUNTU-CVE-2016-4422- CVSS 3.1
- 9.8 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - CVSS 3.0
- 9.8 Critical
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
libpam-sshauthDebian:8 |
before 0.3.1-1+deb8u1, plus listed versions 0.3.1-1 |
0.3.1-1+deb8u1 |
libpam-sshauthUbuntu:14.04:LTS |
before 0.3.1-1deb8u1build0.14.04.1, plus listed versions 0.3.1-1 |
0.3.1-1deb8u1build0.14.04.1 |
libpam-sshauthUbuntu:16.04:LTS |
before 0.3.1-1ubuntu2, plus listed versions 0.3.1-10.3.1-1ubuntu1 |
0.3.1-1ubuntu2 |
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2016-4422 is a critical vulnerability (CVSS 9.8) in Libpam-sshauth Project Libpam-sshauth, published May 4, 2016. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.80%, the 78th percentile. Fixed in libpam-sshauth 0.3.1-1+deb8u1.
References
debian.org/security/2016/dsa-3567
bazaar.launchpad.net/~ltsp-upstream/ltsp/libpam-sshauth/revision/114
nvd.nist.gov/vuln/detail/CVE-2016-4422
github.com/advisories/GHSA-c337-rr2j-g4h6
ubuntu.com/security/CVE-2016-4422
openwall.com/lists/oss-security/2016/05/01/2
cve.org/CVERecord?id=CVE-2016-4422