(Red Hat Issues Fix for Red Hat Linux 7.3) Re: EPIC4 Buffer Overflow in Processing CTCP Nicknames May Let Remote Users Execute Arbitrary Code
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SecurityTracker Alert ID: 1008234 |
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SecurityTracker URL: http://securitytracker.com/id/1008234
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CVE Reference:
CAN-2003-0328
(Links to External Site)
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Date: Nov 19 2003
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Impact:
Denial of service via network, Execution of arbitrary code via network, User access via network
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Fix Available: Yes Vendor Confirmed: Yes
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Version(s): epic4pre2.002, epic4pre2.003 and later versions
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Description:
A vulnerability was reported in EPIC4 in the processing of large nicknames. A remote user acting as an IRC server can cause a connected client to crash and potentially execute arbitrary code.
It is reported that an incorrect length calculation in 'ctcp.c' can be triggered by a remote IRC server sending a CTCP request with a large nickname (greater than approximately 512 bytes), causing EIPC4 to call the alloca() function with a negative value. As a result, an invalid pointer will be returned and memory contents will be overwritten. A remote user can cause arbitrary code to be executed with the privileges of the EPIC4 client user, according to the report.
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Impact:
A remote IRC server can execute arbitrary code on a connected EPIC4 client system with the privileges of the target EPIC4 client user.
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Solution:
Red Hat has issued a fix.
Red Hat Linux 7.3
SRPMS:
epic-1.0.1-15.7.x.src.rpm 080bb85c470e9c12a15edcd96300e087
i386:
epic-1.0.1-15.7.x.i386.rpm e8da45cb6a22eb4dc2935de1f5012478
Red Hat Linux 8.0
SRPMS:
epic-1.0.1-15.8.0.src.rpm 36d4a3832e7aad69fb209f23b4e0c4cd
i386:
epic-1.0.1-15.8.0.i386.rpm cbed1b9694f4205e32a96bf35147e49c
Red Hat Linux 9
SRPMS:
epic-1.0.1-15.9.src.rpm f96a0bc7489d41049aa4c33641afbef1
i386:
epic-1.0.1-15.9.i386.rpm 4e4525b6dafb7d2a8cb728317bf1253c
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Vendor URL: www.epicsol.org/ (Links to External Site)
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Cause:
Boundary error
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Underlying OS:
Linux (Red Hat Linux)
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Message History:
This archive entry is a follow-up to the message listed below.
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Source Message Contents
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Date: Tue, 18 Nov 2003 15:54:49 -0500
Subject: http://rhn.redhat.com/errata/RHSA-2003-342.html
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http://rhn.redhat.com/errata/RHSA-2003-342.html
Updated EPIC packages fix security vulnerability
Advisory: RHSA-2003:342-05
Last updated on: 2003-11-17
Affected Products: Red Hat Linux 7.3
Red Hat Linux 8.0
Red Hat Linux 9
CVEs (cve.mitre.org): CAN-2003-0328
Security Advisory
Details:
Updated EPIC packages which fix an exploitable buffer overflow vulnerability
are now available.
EPIC (Enhanced Programmable ircII Client) is an advanced ircII chat
client designed to connect to Internet Relay Chat (IRC) servers.
A bug in various versions of EPIC allows remote malicious IRC servers to
cause a denial of service (crash) and execute arbitrary code via a CTCP
request from a large nickname, which causes an incorrect length
calculation. The Common Vulnerabilities and Exposures project
(cve.mitre.org) has assigned the name CAN-2003-0328 to this issue.
Users of EPIC who may connect to untrusted servers are advised to upgrade
to the packages in this erratum which contain a backported security fix to
correct this issue.
Updated packages:
Red Hat Linux 7.3
SRPMS:
epic-1.0.1-15.7.x.src.rpm 080bb85c470e9c12a15edcd96300e087
i386:
epic-1.0.1-15.7.x.i386.rpm e8da45cb6a22eb4dc2935de1f5012478
Red Hat Linux 8.0
SRPMS:
epic-1.0.1-15.8.0.src.rpm 36d4a3832e7aad69fb209f23b4e0c4cd
i386:
epic-1.0.1-15.8.0.i386.rpm cbed1b9694f4205e32a96bf35147e49c
Red Hat Linux 9
SRPMS:
epic-1.0.1-15.9.src.rpm f96a0bc7489d41049aa4c33641afbef1
i386:
epic-1.0.1-15.9.i386.rpm 4e4525b6dafb7d2a8cb728317bf1253c
Solution
Before applying this update, make sure all previously released errata
relevant to your system have been applied.
To update all RPMs for your particular architecture, run:
rpm -Fvh [filenames]
where [filenames] is a list of the RPMs you wish to upgrade. Only those
RPMs which are currently installed will be updated. Those RPMs which are
not installed but included in the list will not be updated. Note that you
can also use wildcards (*.rpm) if your current directory *only* contains the
desired RPMs.
Please note that this update is also available via Red Hat Network. Many
people find this an easier way to apply updates. To use Red Hat Network,
launch the Red Hat Update Agent with the following command:
up2date
This will start an interactive process that will result in the appropriate
RPMs being upgraded on your system.
If up2date fails to connect to Red Hat Network due to SSL Certificate
Errors, you need to install a version of the up2date client with an updated
certificate. The latest version of up2date is available from the Red Hat
FTP site and may also be downloaded directly from the RHN website:
https://rhn.redhat.com/help/latest-up2date.pxt
References:
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2003-0328
ftp://ftp.prbh.org/pub/epic/patches/alloca_underrun-patch-1
Keywords:
epic4, irc, ircii
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