Title: Epic CTCP Nickname Server Message Buffer Overrun Vulnerability
Severity: HIGH
Description:
Epic is a freely available IRC client for Unix and Linux variants.
A remotely exploitable buffer overrun has been reported in Epic. This issue may reportedly be exploited by a malicious server that supplies an overly long nickname in a CTCP message. It may be also be possible for a malicious client to send such a message, but it is likely that the server will limit the length.
Reportedly if a nickname of over 512 bytes is supplied in such a message, the client may attempt to call alloca() with a negative number, which could potentially result in corruption of stack memory. In this manner, it may be possible for a malicious IRC server to trigger this condition to execute arbitrary code on the client system in the context of the client user.
Affected Products:
- Epic Epic4 1.0.1
- Epic Epic4 1.1.10
- Epic Epic4 1.1.11
- Epic Epic4 1.1.2 .20020219
- Epic Epic4 1.1.3
- Epic Epic4 1.1.4
- Epic Epic4 1.1.5
- Epic Epic4 1.1.6
- Epic Epic4 1.1.7
- Epic Epic4 1.1.7 .20020907
- Epic Epic4 pre2.002
- Epic Epic4 pre2.003
- RedHat Linux 7.3.0 i386
- RedHat Linux 8.0.0 i386
- RedHat Linux 9.0.0 i386
- Slackware Linux 8.1.0
- Slackware Linux 9.0.0
References:
- Epic: Epic Homepage
- Red Hat: RHSA-2003-342
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