FreeBSD VuXML: Documenting security issues in FreeBSD and the FreeBSD Ports Collection

fetchmail -- chosen plaintext attack against SSL CBC initialization vectors

Affected packages
6.3.9 <= fetchmail < 6.3.22


VuXML ID 18ce9a90-f269-11e1-be53-080027ef73ec
Discovery 2012-01-19
Entry 2012-08-30

Matthias Andree reports:

Fetchmail version 6.3.9 enabled "all SSL workarounds" (SSL_OP_ALL) which contains a switch to disable a countermeasure against certain attacks against block ciphers that permit guessing the initialization vectors, providing that an attacker can make the application (fetchmail) encrypt some data for him -- which is not easily the case.

Stream ciphers (such as RC4) are unaffected.

Credits to Apple Product Security for reporting this.


CVE Name CVE-2011-3389