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CVE-2008-0891

Status Candidate

Overview

Double free vulnerability in OpenSSL 0.9.8f and 0.9.8g, when the TLS server name extensions are enabled, allows remote attackers to cause a denial of service (crash) via a malformed Client Hello packet. NOTE: some of these details are obtained from third party information.

Related Files

Ubuntu Security Notice 620-1
Posted Jun 26, 2008
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 620-1 - It was discovered that OpenSSL was vulnerable to a double-free when using TLS server extensions. A remote attacker could send a crafted packet and cause a denial of service via application crash in applications linked against OpenSSL. Ubuntu 8.04 LTS does not compile TLS server extensions by default. It was discovered that OpenSSL could dereference a NULL pointer. If a user or automated system were tricked into connecting to a malicious server with particular cipher suites, a remote attacker could cause a denial of service via application crash.

tags | advisory, remote, denial of service
systems | linux, ubuntu
advisories | CVE-2008-0891, CVE-2008-1672
MD5 | e3d8ad2ad350589c4ffb1f35b0d2da37
Gentoo Linux Security Advisory 200806-8
Posted Jun 24, 2008
Authored by Gentoo | Site security.gentoo.org

Gentoo Linux Security Advisory GLSA 200806-08 - Two vulnerabilities might allow for a Denial of Service of daemons using OpenSSL. Versions less than 0.9.8g-r2 are affected.

tags | advisory, denial of service, vulnerability
systems | linux, gentoo
advisories | CVE-2008-0891, CVE-2008-1672
MD5 | 17c61fdc86e90aef4e2407a5486c4536
Mandriva Linux Security Advisory 2008-107
Posted May 29, 2008
Authored by Mandriva | Site mandriva.com

Mandriva Linux Security Advisory - Testing using the Codenomicon TLS test suite discovered a flaw in the handling of server name extension data in OpenSSL 0.9.8f and OpenSSL 0.9.8g. If OpenSSL has been compiled using the non-default TLS server name extensions, a remote attacker could send a carefully crafted packet to a server application using OpenSSL and cause a crash. Testing using the Codenomicon TLS test suite discovered a flaw if the 'Server Key exchange message' is omitted from a TLS handshake in OpenSSL 0.9.8f and OpenSSL 0.9.8g. If a client connects to a malicious server with particular cipher suites, the server could cause the client to crash.

tags | advisory, remote
systems | linux, mandriva
advisories | CVE-2008-0891, CVE-2008-1672
MD5 | bfaecbed16231165b9ab27f75a832068
secadv_20080528.txt
Posted May 28, 2008
Site openssl.org

OpenSSL Security Advisory - Two moderate severity security flaws have been fixed in OpenSSL 0.9.8h. Testing using the Codenomicon TLS test suite discovered a flaw in the handling of server name extension data in OpenSSL 0.9.8f and OpenSSL 0.9.8g. Testing using the Codenomicon TLS test suite discovered a flaw if the 'Server Key exchange message' is omitted from a TLS handshake in OpenSSL 0.9.8f and OpenSSL 0.9.8g.

tags | advisory
advisories | CVE-2008-0891, CVE-2008-1672
MD5 | 8ff6fbfb291984e8b98a3897d4666108
openssl-0.9.8h.tar.gz
Posted May 28, 2008
Site openssl.org

OpenSSL is a robust, fully featured Open Source toolkit implementing the Secure Sockets Layer (SSL v2/v3) and Transport Layer Security (TLS v1) protocols with full-strength cryptography world-wide.

Changes: Two crash related security flaws have been fixed in this version.
tags | encryption, protocol
advisories | CVE-2008-0891, CVE-2008-1672
MD5 | 7d3d41dafc76cf2fcb5559963b5783b3
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