It was discovered that OpenSSL does not properly verify DSA signatures on X.509 certificates due to an API misuse, potentially leading to the acceptance of incorrect X.509 certificates as genuine (CVE-2008-5077).
For the stable distribution (etch), this problem has been fixed in version 0.9.8c-4etch4 of the openssl package, and version 0.9.7k-3.1etch2 of the openssl097 package.
For the unstable distribution (sid), this problem has been fixed in version 0.9.8g-15.
The testing distribution (lenny) will be fixed soon.
We recommend that you upgrade your OpenSSL packages.
MD5 checksums of the listed files are available in the original advisory.