GnuTLS libgnutls denial of service
| gnutls-libgnutls-dos (50445) |  Medium Risk |
Description:
GnuTLS is vulnerable to a denial of service, caused by the improper handling of invalid DSA signatures by lib/pk-libgcrypt.c within libgnutls. A remote attacker could exploit this vulnerability using a specially-crafted DSA key that triggers a free of an uninitialized pointer or a double free to cause the application to crash.
*CVSS:
| Base Score: | 5 |
| Access Vector: | Network |
| Access Complexity: | Low |
| Authentication: | None |
| Confidentiality Impact: | None |
| Integrity Impact: | None |
| Availability Impact: | Partial |
| Temporal Score: | 3.7 |
| Exploitability: | Unproven |
| Remediation Level: | Official-Fix |
| Report Confidence: | Confirmed |
Consequences:
Denial of Service
Remedy:
Upgrade to the latest version of GnuTLS (2.6.6 or later), available from the GNU TLS Library Project Web site. See References.
References:
- GNU TLS Library Project Web site: The GNU Transport Layer Security Library .
- gnutls-devel Mailing List, 2009-04-30 10:36:31 GMTT: Double free and free of invalid pointer on certain errors [GNUTLS-SA-2009-1].
- BID-34783: GnuTLS Prior to 2.6.6 Multiple Remote Vulnerabilities
- CVE-2009-1415: lib/pk-libgcrypt.c in libgnutls in GnuTLS before 2.6.6 does not properly handle invalid DSA signatures, which allows remote attackers to cause a denial of service (application crash) and possibly have unspecified other impact via a malformed DSA key that triggers a (1) free of an uninitialized pointer or (2) double free.
- GLSA-200905-04: GnuTLS: Multiple vulnerabilities
- MDVSA-2009:116: gnutls
- SA34842: GnuTLS Multiple Vulnerabilities
- SECTRACK ID: 1022157: GnuTLS Bug in Validating DSA Signatures Lets Remote Users Deny Service
- VUPEN/ADV-2009-1218: GnuTLS Key and Certificate Handling Double Free and DoS Vulnerabilities
Platforms Affected:
- Gentoo Linux
- GNU GnuTLS 2.6.0
- GNU GnuTLS 2.6.1
- GNU GnuTLS 2.6.2
- GNU GnuTLS 2.6.3
- GNU GnuTLS 2.6.4
- GNU GnuTLS 2.6.5
- MandrakeSoft Mandrake Linux 2008.1 X86_64
- MandrakeSoft Mandrake Linux 2008.1
- MandrakeSoft Mandrake Linux Corporate Server 4.0 X86_64
- MandrakeSoft Mandrake Linux Corporate Server 4.0
- Mandriva Linux 2009.0
- Mandriva Linux 2009.0 X86_64
- Mandriva Linux 2009.1 X86_64
- Mandriva Linux 2009.1
Reported:
Apr 30, 2009
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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.