8278 : GnuTLS X.509 Certificate Signature Verification DoS
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Views This Week	Views All Time	Added to OSVDB	Last Modified	Modified (since 2008)	Percent Complete
5	747	almost 9 years ago	about 5 years ago	2 times	90%

Timeline

Disclosure Date
2004-08-02

Description

GnuTLS contains a flaw that may allow a remote denial of service. The issue is due to the product not limiting the length of a certificate chain or the size of the RSA or DSA keys used to sign a X.509 certificate. An attacker can craft a certificate using very large keys causing the product to consume excessive CPU resources when trying to validate the certificate chain resulting in a denial of service condition, and will result in loss of availability for the platform.

Classification

Location: Remote / Network Access
Attack Type: Denial of Service
Impact: Loss of Availability
Exploit: Exploit Public

Solution

Upgrade to version 1.0.17 or higher, as it has been reported to fix this vulnerability. An upgrade is required as there are no known workarounds.

Products

GNU

GnuTLS

1.0.16

References

Security Tracker: 1010838
Bugtraq ID: 10839
Secunia Advisory ID: 12156
ISS X-Force ID: 16858
CVE ID: 2004-2531 (see also: NVD)
Mail List Post: http://archives.neohapsis.com/archives/bugtraq/2004-08/0010.html
http://lists.gnupg.org/pipermail/gnutls-dev/2004-August/000703.html
Vendor URL: http://www.gnu.org/software/gnutls/
Other Advisory URL: http://www.hornik.sk/SA/SA-20040802.txt

Credit

Patrik Hornik - patrikhornik.sk -

CVSSv2 Score

CVSSv2 Base Score = 7.8
Source: nvd.nist.gov | Generated: 2005-12-07 | Disagree?

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