Joined: 12 May 2004
|Posted: Mon Jun 23, 2008 11:26 pm Post subject: [ GLSA 200806-08 ] OpenSSL: Denial of Service
|Gentoo Linux Security Advisory
Title: OpenSSL: Denial of Service (GLSA 200806-08)
Date: June 23, 2008
Two vulnerabilities might allow for a Denial of Service of daemons using OpenSSL.
OpenSSL is an Open Source toolkit implementing the Secure Sockets Layer (SSL v2/v3) and Transport Layer Security (TLS v1) as well as a general purpose cryptography library.
Vulnerable: < 0.9.8g-r2
Unaffected: >= 0.9.8g-r2
Unaffected: < 0.9.8f
Architectures: All supported architectures
Ossi Herrala and Jukka Taimisto of Codenomicon discovered two vulnerabilities:
- A double free() call in the TLS server name extension (CVE-2008-0891).
- The OpenSSL client code does not properly handle servers that omit the Server Key Exchange message in the TLS handshake (CVE-2008-1672).
A remote attacker could connect to a vulnerable server, or entice a daemon to connect to a malicious server, causing a Denial of Service of the daemon in both cases.
There is no known workaround at this time.
All OpenSSL users should upgrade to the latest version:
|# emerge --sync
# emerge --ask --oneshot --verbose ">=dev-libs/openssl-0.9.8g-r2"