pam: integer signedness error in _pam_StrTok()
Published Mar 12, 2009
6.6
MEDIUMCVSS 2.0
EPSS 1.93%
Description
Integer signedness error in the _pam_StrTok function in libpam/pam_misc.c in Linux-PAM (aka pam) 1.0.3 and earlier, when a configuration file contains non-ASCII usernames, might allow remote attackers to cause a denial of service, and might allow remote authenticated users to obtain login access with a different user's non-ASCII username, via a login attempt.
Affected products
No data.
- ≤ 1.0.3
- 0.99.1.0
- 0.99.2.0
- 0.99.2.1
- 0.99.3.0
- 0.99.4.0
- 0.99.5.0
- 0.99.6.0
- 0.99.6.1
- 0.99.6.2
- 0.99.6.3
- 0.99.7.0
- 0.99.7.1
- 0.99.8.0
- 0.99.8.1
- 0.99.9.0
- 0.99.10.0
- 1.0.0
- 1.0.1
- 1.0.2
No data.
No Red Hat product state for this CVE.
No package ranges for this CVE.
Remediation
Red Hat statement
Red Hat does not consider this issue to be a security vulnerability. Affected function is only used to parse PAM configuration files and this bug can only be triggered by specific configuration created by the system administrator.
Metrics
No CVSS v4.0 score for this CVE.
No CVSS v3.1 score for this CVE.
No CVSS v3.0 score for this CVE.
AV:L/AC:M/Au:S/C:C/I:C/A:C
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
Score over time
2022–2026- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (10 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 1.93% (0.01929) | 79.25th | v5 (v2026.06.15) |
| Jun 15, 2026 | 1.93% (0.01929) | 77.27th | v5 (v2026.06.15) |
| Mar 17, 2025 | 0.29% (0.00289) | 50.23th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.42% (0.00419) | 74.99th | v3 (v2023.03.01) |
| Feb 8, 2024 | 0.42% (0.00419) | 73.48th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.42% (0.00419) | 70.14th | v3 (v2023.03.01) |
| Mar 6, 2023 | 1.65% (0.01649) | 75.99th | v2 (v2022.01.01) |
| Feb 23, 2023 | 1.65% (0.01649) | 75.95th | v2 (v2022.01.01) |
| Apr 1, 2022 | 1.65% (0.01649) | 73.90th | v2 (v2022.01.01) |
| Feb 4, 2022 | 1.65% (0.01649) | 52.77th | v2 (v2022.01.01) |
References (13)
- http://openwall.com/lists/oss-security/2009/03/05/1 mailing-listx_refsource_MLISTExploit
- http://pam.cvs.sourceforge.net/viewvc/pam/Linux-PAM/libpam/pam_misc.c?r1=1.9&%3Br2=1.10&%3Bview=patch x_refsource_CONFIRM
- http://pam.cvs.sourceforge.net/viewvc/pam/Linux-PAM/libpam/pam_misc.c?view=log x_refsource_CONFIRM
- http://secunia.com/advisories/34733 third-party-advisoryx_refsource_SECUNIA
- http://www.mandriva.com/security/advisories?name=MDVSA-2009:077 vendor-advisoryx_refsource_MANDRIVA
- http://www.securityfocus.com/bid/34010 vdb-entryx_refsource_BIDPatch
- https://access.redhat.com/security/cve/CVE-2009-0887 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=489932 Issue Tracking
- https://exchange.xforce.ibmcloud.com/vulnerabilities/49110 vdb-entryx_refsource_XF
- https://nvd.nist.gov/vuln/detail/CVE-2009-0887
- https://www.cve.org/CVERecord?id=CVE-2009-0887
- https://www.redhat.com/archives/fedora-package-announce/2009-April/msg00398.html vendor-advisoryx_refsource_FEDORA
- https://www.redhat.com/archives/fedora-package-announce/2009-April/msg00420.html vendor-advisoryx_refsource_FEDORA
Change history (0)
No recorded changes yet.