Libksba library X.509 certificate denial of service
| libksba-x509-dos (29621) |  Low Risk |
Description:
The Libksba library, used in various packages, is vulnerable to a denial of service caused by improper parsing of X.509 certificate signatures. By sending a malicious X.509 certificate with trailing signature data, a remote attacker could cause the application using the libksba library to crash.
*CVSS:
| Base Score: | 3.5 |
| Access Vector: | Remote |
| Access Complexity: | Low |
| Authentication: | Not Required |
| Confidentiality Impact: | None |
| Integrity Impact: | None |
| Availability Impact: | Partial |
| Temporal Score: | 2.6 |
| Exploitability: | Unproven |
| Remediation Level: | Official-Fix |
| Report Confidence: | Confirmed |
Consequences:
Denial of Service
Remedy:
For Ubuntu Linux:
Refer to USN-365-1 for patch, upgrade, or suggested workaround information. See References.
For SUSE Linux:
Refer to SUSE Security Summary Report SUSE-SR:2006:023 for patch, upgrade, or suggested workaround information. See References.
For other distributions:
Contact your vendor for upgrade or patch information.
References:
- GnuPG.org Web site: Libksba.
- BID-20565: Libksba Signature Verification Denial of Service Vulnerability
- CVE-2006-5111: The libksba library 0.9.12 and possibly other versions, as used by gpgsm in the newpg package on SUSE LINUX, allows attackers to cause a denial of service (application crash) via a malformed X.509 certificate in a signature.
- MDKSA-2006:183: Updated libksba packages correct DoS vulnerability
- SA22423: libksba X.509 Certificates Denial of Service Vulnerability
- USN-365-1: libksba vulnerability
Platforms Affected:
- Canonical Ubuntu 5.04
- GNU Libksba 0.9.12
- MandrakeSoft Mandrake Linux 2006 X86_64
- MandrakeSoft Mandrake Linux 2006
- MandrakeSoft Mandrake Linux Corporate Server 4.0 X86_64
- MandrakeSoft Mandrake Linux Corporate Server 4.0
- SUSE SuSE Linux
Reported:
Oct 17, 2006
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The information within this database may change without notice. Use of this information constitutes acceptance for use in an AS IS condition. There are NO warranties, implied or otherwise, with regard to this information or its use. Any use of this information is at the user's risk. In no event shall IBM be held liable for any damages whatsoever arising out of or in connection with the use or spread of this information.