OpenSSL: Multiple vulnerabilities
Gentoo Linux Security Advisory
||GLSA 200610-11 / openssl
||October 24, 2006
||October 24, 2006: 01
All supported architectures
OpenSSL contains multiple vulnerabilities including the possible remote
execution of arbitrary code.
OpenSSL is a toolkit implementing the Secure Sockets Layer, Transport
Layer Security protocols and a general-purpose cryptography library.
Tavis Ormandy and Will Drewry, both of the Google Security Team,
discovered that the SSL_get_shared_ciphers() function contains a buffer
overflow vulnerability, and that the SSLv2 client code contains a flaw
leading to a crash. Additionally Dr. Stephen N. Henson found that the
ASN.1 handler contains two Denial of Service vulnerabilities: while
parsing an invalid ASN.1 structure and while handling certain types of
An attacker could trigger the buffer overflow vulnerability by sending
a malicious suite of ciphers to an application using the vulnerable
function, and thus execute arbitrary code with the rights of the user
running the application. An attacker could also consume CPU and/or
memory by exploiting the Denial of Service vulnerabilities. Finally a
malicious server could crash a SSLv2 client through the SSLv2
There is no known workaround at this time.
All OpenSSL 0.9.8 users should upgrade to the latest version:
Code Listing 3.1: Resolution
# emerge --sync
# emerge --ask --oneshot --verbose ">=dev-libs/openssl-0.9.8d"
All OpenSSL 0.9.7 users should upgrade to the latest version:
Code Listing 3.2: Resolution
# emerge --sync
# emerge --ask --oneshot --verbose ">=dev-libs/openssl-0.9.7l"