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CVE-2009-0887

19
FAUCET Score

CVE-2009-0887 describes an integer signedness error in the _pam_StrTok function within Linux-PAM (libpam) versions 1.0.3 and earlier. This vulnerability, affecting Linux-PAM, could lead to a denial of service for remote attackers and allow remote authenticated users to gain unauthorized login access using a different user's non-ASCII username. With a CVSS score of 6.6, it is considered a medium-severity vulnerability, requiring local access and medium attack complexity to achieve complete confidentiality, integrity, and availability impacts. There is no evidence of active exploitation, publicly available exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
<= 1.0.3CPE matchmatch criteria
cpe:2.3:a:linux-pam:linux-pam:*:*:*:*:*:*:*:*
0.99.1.0CPE matchmatch criteria
cpe:2.3:a:linux-pam:linux-pam:0.99.1.0:*:*:*:*:*:*:*
0.99.2.0CPE matchmatch criteria
cpe:2.3:a:linux-pam:linux-pam:0.99.2.0:*:*:*:*:*:*:*
0.99.2.1CPE matchmatch criteria
cpe:2.3:a:linux-pam:linux-pam:0.99.2.1:*:*:*:*:*:*:*
0.99.3.0CPE matchmatch criteria
cpe:2.3:a:linux-pam:linux-pam:0.99.3.0:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

6.6MEDIUM

AV:L/AC:M/Au:S/C:C/I:C/A:C

Confidentiality Impact
COMPLETE
Integrity Impact
COMPLETE
Availability Impact
COMPLETE
Access Vector
LOCAL
Access Complexity
MEDIUM
Authentication
SINGLE
Exploitability Score
2.7
Impact Score
10.0
CvssVersion
2.0

Exploit Intelligence

EPSS Score
1.93%
Probability of exploitation in next 30 days
EPSS Percentile
77.8%
Percentile rank of EPSS score among Peer Group
As of 2026-07-24
Model: v2026.06.15
This CVE's current EPSS score of 0.0193 is in the 94th percentile among its peer group of 1,296 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.4 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Vendor Advisories (1)

redhatCVE-2009-0887Low

pam: integer signedness error in _pam_StrTok()

Feb 25, 2009

References

openwall.com / lists/oss-security/2009/03/05/1
Exploit
pam.cvs.sourceforge.net / viewvc/pam/Linux-PAM/libpam/pam_misc.c
pam.cvs.sourceforge.net / viewvc/pam/Linux-PAM/libpam/pam_misc.c
secunia.com / advisories/34733
exchange.xforce.ibmcloud.com / vulnerabilities/49110
redhat.com / archives/fedora-package-announce/2009-April/msg00398.html
redhat.com / archives/fedora-package-announce/2009-April/msg00420.html
mandriva.com / security/advisories
securityfocus.com / bid/34010
Patch