Joined: 12 May 2004
|Posted: Thu Feb 12, 2009 9:26 pm Post subject: [ GLSA 200902-02 ] OpenSSL: Certificate validation error
|Gentoo Linux Security Advisory
Title: OpenSSL: Certificate validation error (GLSA 200902-02)
Date: February 12, 2009
An error in the OpenSSL certificate chain validation might allow for spoofing attacks.
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: < 0.9.8j
Unaffected: >= 0.9.8j
Architectures: All supported architectures
The Google Security Team reported that several functions incorrectly check the result after calling the EVP_VerifyFinal() function, allowing a malformed signature to be treated as a good signature rather than as an error. This issue affects the signature checks on DSA and ECDSA keys used with SSL/TLS.
A remote attacker could exploit this vulnerability and spoof arbitrary names to conduct Man-In-The-Middle attacks and intercept sensitive information.
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-0.9.8j"