Ubuntu Security Notice USN-522-1
28th September, 2007
openssl vulnerabilities
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 7.04
- Ubuntu 6.10
- Ubuntu 6.06 LTS
Software description
- openssl
Details
It was discovered that OpenSSL did not correctly perform Montgomery
multiplications. Local attackers might be able to reconstruct RSA
private keys by examining another user's OpenSSL processes. (CVE-2007-3108)
Moritz Jodeit discovered that OpenSSL's SSL_get_shared_ciphers function
did not correctly check the size of the buffer it was writing to.
A remote attacker could exploit this to write one NULL byte past the end of
an application's cipher list buffer, possibly leading to arbitrary code
execution or a denial of service. (CVE-2007-5135)
Update instructions
The problem can be corrected by updating your system to the following package version:
- Ubuntu 7.04:
- libssl0.9.8 0.9.8c-4ubuntu0.1
- Ubuntu 6.10:
- libssl0.9.8 0.9.8b-2ubuntu2.1
- Ubuntu 6.06 LTS:
- libssl0.9.8 0.9.8a-7ubuntu0.4
To update your system, please follow these instructions: https://wiki.ubuntu.com/Security/Upgrades.
After a standard system upgrade you need to reboot your computer to
effect the necessary changes.