Heap-based buffer overflow in iconvert.c in the bogolexer component in Bogofilter before 1.2.3 allows remote attackers to cause a denial of service (crash) and possibly execute arbitrary code via an email containing a base64 string that is decoded to incomplete multibyte characters.

Multiple buffer underflows in the base64 decoder in base64.c in (1) bogofilter and (2) bogolexer in bogofilter before 1.2.2 allow remote attackers to cause a denial of service (heap memory corruption and application crash) via an e-mail message with invalid base64 data that begins with an = (equals) character.

Heap-based buffer overflow in bogofilter 0.96.2, 0.95.2, 0.94.14, 0.94.12, and other versions from 0.93.5 to 0.96.2, when using Unicode databases, allows remote attackers to cause a denial of service (crash) and possibly execute arbitrary code via "invalid input sequences" that lead to heap corruption when bogofilter or bogolexer converts character sets.

Heap-based buffer overflow in bogofilter and bogolexer 0.96.2 allows remote attackers to cause a denial of service (crash) and possibly execute arbitrary code via words that are longer than the input buffer used by flex.

The quoted-printable decoder in bogofilter 0.17.4 to 0.92.7 allows remote attackers to cause a denial of service (application crash) via mail headers that cause a line feed (LF) to be replaced by a null byte that is written to an incorrect memory address.

bogopass in bogofilter 0.9.0.4 allows local users to overwrite arbitrary files via a symlink attack on the bogopass temporary file.