Timo Sirainen discovered several problems in EPIC4, a popular client for Internet Relay Chat (IRC). A malicious server could craft special reply strings, triggering the client to write beyond buffer boundaries. This could lead to a denial of service if the client only crashes, but may also lead to executing of arbitrary code under the user id of the chatting user.
For the stable distribution (woody) these problems have been fixed in version 184.108.40.20620219-2.1.
For the old stable distribution (potato) these problems have been fixed in version pre2.508-2.3.
For the unstable distribution (sid) these problems have been fixed in version 220.127.116.1130409-1.
We recommend that you upgrade your EPIC4 package.
MD5 checksums of the listed files are available in the original advisory.