Integer overflow in camel-lock-helper in Evolution 2.0.2 and earlier allows local users or remote malicious POP3 servers to execute arbitrary code via a length value of -1, which leads to a zero byte memory allocation and a buffer overflow.

The IMAP Client for Evolution 1.2.4 allows remote malicious IMAP servers to cause a denial of service and possibly execute arbitrary code via certain large literal size values that cause either integer signedness errors or integer overflow errors.

The IMAP Client for Sylpheed 0.8.11 allows remote malicious IMAP servers to cause a denial of service (crash) via certain large literal size values that cause either integer signedness errors or integer overflow errors.