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.
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
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.
Consequences:
Denial of Service
References:
- GnuPG.org Web site, Libksba at http://www.gnupg.org/(en)/related_software/libksba/index.html.
- 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
Reported:
Oct 17, 2006
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