GnuTLS Llibtasn1 DER decoding denial of service
| gnutls-libtasn1-der-dos (24606) |  Medium Risk |
Description:
Gnu Transport Layer Security Library (GnuTLS) is vulnerable to a denial of service attack, caused by multiple buffer overflows in the DER decoding functionality. By sending invalid data to the Libtasn1 library, a remote attacker could overflow a buffer and cause Libtasn1 and any other application linked to Libtasn1 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:
Upgrade to the latest version of Libtasn1 (0.2.18 or later), available from the Tiny ASN1 library Web page. See References.
For Debian GNU/Linux:
Refer to DSA-986-1 and DSA-985-1 for patch, upgrade, or suggested workaround information. See References.
For Ubuntu Linux:
Refer to USN-251-1 for patch or upgrade information. See References.
For Red Hat Linux:
Refer to RHSA-2006:0207-10 for patch, upgrade, or suggested workaround information. See References.
For Gentoo Linux:
Refer to Gentoo Linux Security Announcement GLSA 2006-02-08 for patch, upgrade, or suggested workaround information. See References.
For other distributions:
Contact your vendor for patch or upgrade information.
References:
- Fedora Update Notification FEDORA-2006-107: Fedora Core 4 Update: gnutls-1.0.25-2.FC4.
- gnutls-dev Mailing List, Thu Feb 9 16:38:35 CET 2006 : Libtasn1 0.2.18 - Tiny ASN.1 Library - Security release.
- Tiny ASN.1 library Web page: Tiny ASN.1 library - Libtasn1.
- BID-16568: GNUTLS LibTASN1 DER Decoding Denial of Service Vulnerabilities
- CVE-2006-0645: Tiny ASN.1 Library (libtasn1) before 0.2.18, as used by (1) GnuTLS 1.2.x before 1.2.10 and 1.3.x before 1.3.4, and (2) GNU Shishi, allows attackers to crash the DER decoder and possibly execute arbitrary code via out-of-bounds access caused by invalid input, as demonstrated by the ProtoVer SSL test suite.
- DSA-985: libtasn1-2 -- buffer overflows
- DSA-986: gnutls11 -- buffer overflows
- MDKSA-2006:039: Updated gnutls packages fix libtasn1 out-of-bounds access vulnerabilities
- RHSA-2006-0207: gnutls security update
- SA18794: GnuTLS libtasn1 DER Decoding Denial of Service Vulnerabilities
- SECTRACK ID: 1015612: GnuTLS libtasn1 DER Decoding Bugs Let Remote Users Deny Service
- USN-251-1: libtasn vulnerability
- VUPEN/ADV-2006-0496: GnuTLS libtasn1 DER Decoding Multiple Denial of Service Vulnerabilities
Platforms Affected:
- Canonical Ubuntu 4.10
- Canonical Ubuntu 5.04
- Canonical Ubuntu 5.10
- Debian Debian Linux 3.1
- FedoraProject Fedora Core 4
- Gentoo Linux
- MandrakeSoft Mandrake Linux 10.1
- MandrakeSoft Mandrake Linux 10.1 X86_64
- MandrakeSoft Mandrake Linux 2006 X86_64
- MandrakeSoft Mandrake Linux 2006
- MandrakeSoft Mandrake Linux LE2005
- MandrakeSoft Mandrake Linux LE2005 X86_64
- RedHat Enterprise Linux 4 Desktop
- RedHat Enterprise Linux 4 ES
- RedHat Enterprise Linux 4 AS
- RedHat Enterprise Linux 4 WS
- Simon Josefsson libtASN1 0.2.7
Reported:
Feb 09, 2006
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 the author/distributor (IBM Internet Security Systems X-Force) be held liable for any damages whatsoever arising out of or in connection with the use or spread of this information.
For corrections or additions please email xforce@iss.net
* According to the Forum of Incident Response and Security Teams (FIRST), the Common Vulnerability Scoring System (CVSS) is an "industry open standard designed to convey vulnerability severity and help to determine urgency and priority of response." IBM PROVIDES THE CVSS SCORES "AS IS" WITHOUT WARRANTY OF ANY KIND, INCLUDING THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. CUSTOMERS ARE RESPONSIBLE FOR ASSESSING THE IMPACT OF ANY ACTUAL OR POTENTIAL SECURITY VULNERABILITY.
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.