GnuTLS Llibtasn1 DER decoding denial of service
| gnutls-libtasn1-der-dos (24606) |  Low 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.
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
- MandrakeSoft, Mandrake Linux 2006 X86_64
- MandrakeSoft, Mandrake Linux LE2005 X86_64
- MandrakeSoft, Mandrake Linux LE2005
- RedHat, Enterprise Linux 4 Desktop
- RedHat, Enterprise Linux 4 AS
- RedHat, Enterprise Linux 4 WS
- RedHat, Enterprise Linux 4 ES
- Simon Josefsson, libtASN1 0.2.7 and prior
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.
Consequences:
Denial of Service
References:
- Fedora Update Notification FEDORA-2006-107, Fedora Core 4 Update: gnutls-1.0.25-2.FC4 at http://www.redhat.com/archives/fedora-announce-list/2006-February/msg00043.html.
- gnutls-dev Mailing List, Thu Feb 9 16:38:35 CET 2006 , Libtasn1 0.2.18 - Tiny ASN.1 Library - Security release at http://lists.gnupg.org/pipermail/gnutls-dev/2006-February/001058.html.
- Tiny ASN.1 library Web page, Tiny ASN.1 library - Libtasn1 at http://josefsson.org/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
Reported:
Feb 09, 2006
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