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Category: Application (Generic) > EPIC4

Vendors: EPIC Project

(Debian Issues Fix) Re: EPIC4 Buffer Overflow in Processing CTCP Nicknames May Let Remote Users Execute Arbitrary Code

SecurityTracker Alert ID: 1008134

CVE Reference: CAN-2003-0328 (Links to External Site)

Date: Nov 10 2003

Impact: Denial of service via network, Execution of arbitrary code via network, User access via network

Fix Available: Yes Vendor Confirmed: Yes

Version(s): epic4pre2.002, epic4pre2.003 and later versions

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.

Impact: A remote IRC server can execute arbitrary code on a connected EPIC4 client system with the privileges of the target EPIC4 client user.

Vendor URL: www.epicsol.org/ (Links to External Site)

Cause: Boundary error

Underlying OS: Linux (Debian)

Underlying OS Comments: 3.0

Reported By: debian-security-announce@lists.debian.org

Message History: This archive entry is a follow-up to the message listed below.

Nov 10 2003

EPIC4 Buffer Overflow in Processing CTCP Nicknames May Let Remote Users Execute Arbitrary Code

Source Message Contents

Date: Mon, 10 Nov 2003 15:10:04 +0100 (CET)
From: debian-security-announce@lists.debian.org
Subject: [Full-Disclosure] [SECURITY] [DSA 399-1] New epic4 packages fix denial of service

 

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

- --------------------------------------------------------------------------
Debian Security Advisory DSA 399-1                     security@debian.org
http://www.debian.org/security/                             Martin Schulze
November 10th, 2003                     http://www.debian.org/security/faq
- --------------------------------------------------------------------------

Package        : epic4
Vulnerability  : buffer overflow
Problem-Type   : remote
Debian-specific: no
CVE Id         : CAN-2003-0328

Jeremy Nelson discovered a remotely exploitable buffer overflow in
EPIC4, a popular client for Internet Relay Chat (IRC).  A malicious
server could craft a reply which triggers the client to allocate a
negative amount of memory.  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) this problem has been fixed in
version 1.1.2.20020219-2.2.

For the unstable distribution (sid) this problem has been fixed in
version 1.1.11.20030409-2.

We recommend that you upgrade your epic4 package.


Upgrade Instructions
- --------------------

wget url
        will fetch the file for you
dpkg -i file.deb
        will install the referenced file.

If you are using the apt-get package manager, use the line for
sources.list as given below:

apt-get update
        will update the internal database
apt-get upgrade
        will install corrected packages

You may use an automated update by adding the resources from the
footer to the proper configuration.


Debian GNU/Linux 3.0 alias woody
- --------------------------------

  Source archives:

    http://security.debian.org/pool/updates/main/e/epic4/epic4_1.1.2.20020219-2.2.dsc
      Size/MD5 checksum:      632 3bfdb704855cba1347f0d817a14ac811
    http://security.debian.org/pool/updates/main/e/epic4/epic4_1.1.2.20020219-2.2.diff.gz
      Size/MD5 checksum:    13465 bc712024ef53fc4f1e50e1d0a8430720
    http://security.debian.org/pool/updates/main/e/epic4/epic4_1.1.2.20020219.orig.tar.gz
      Size/MD5 checksum:   647989 2f5d39e7cc17fd83e455cbc442f45dd0

  Alpha architecture:

    http://security.debian.org/pool/updates/main/e/epic4/epic4_1.1.2.20020219-2.2_alpha.deb
      Size/MD5 checksum:   451484 235857ceb58e9bd9e609e4e7afac8a07

  ARM architecture:

    http://security.debian.org/pool/updates/main/e/epic4/epic4_1.1.2.20020219-2.2_arm.deb
      Size/MD5 checksum:   374938 8c227e918cc44976951b235d2da29355

  Intel IA-32 architecture:

    http://security.debian.org/pool/updates/main/e/epic4/epic4_1.1.2.20020219-2.2_i386.deb
      Size/MD5 checksum:   357100 9ef2ed5afc44e11b0c3d60c53e19991e

  Intel IA-64 architecture:

    http://security.debian.org/pool/updates/main/e/epic4/epic4_1.1.2.20020219-2.2_ia64.deb
      Size/MD5 checksum:   541986 4d6c24d75acdcf326633afe0188f200d

  HP Precision architecture:

    http://security.debian.org/pool/updates/main/e/epic4/epic4_1.1.2.20020219-2.2_hppa.deb
      Size/MD5 checksum:   423238 17447b982271b8c233a004491f76f372

  Motorola 680x0 architecture:

    http://security.debian.org/pool/updates/main/e/epic4/epic4_1.1.2.20020219-2.2_m68k.deb
      Size/MD5 checksum:   337644 cdbc15cd7dea8abd7a407e93dded2a26

  Big endian MIPS architecture:

    http://security.debian.org/pool/updates/main/e/epic4/epic4_1.1.2.20020219-2.2_mips.deb
      Size/MD5 checksum:   388442 53b524501e1671bd8912cf1607a50f74

  Little endian MIPS architecture:

    http://security.debian.org/pool/updates/main/e/epic4/epic4_1.1.2.20020219-2.2_mipsel.deb
      Size/MD5 checksum:   389438 e8fa4bcebaab3ec6b6039d500535a1a3

  PowerPC architecture:

    http://security.debian.org/pool/updates/main/e/epic4/epic4_1.1.2.20020219-2.2_powerpc.deb
      Size/MD5 checksum:   384452 80bcac652557ddf726cf81b649a7c4f6

  IBM S/390 architecture:

    http://security.debian.org/pool/updates/main/e/epic4/epic4_1.1.2.20020219-2.2_s390.deb
      Size/MD5 checksum:   370862 beb0dcb0d0fc71d6182cd12133bc58e8

  Sun Sparc architecture:

    http://security.debian.org/pool/updates/main/e/epic4/epic4_1.1.2.20020219-2.2_sparc.deb
      Size/MD5 checksum:   372884 c6db693e131441d8b6ff0147bf99625a


  These files will probably be moved into the stable distribution on
  its next revision.

- ---------------------------------------------------------------------------------
For apt-get: deb http://security.debian.org/ stable/updates main
For dpkg-ftp: ftp://security.debian.org/debian-security dists/stable/updates/main
Mailing list: debian-security-announce@lists.debian.org
Package info: `apt-cache show <pkg>' and http://packages.debian.org/<pkg>

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_______________________________________________
Full-Disclosure - We believe in it.
Charter: http://lists.netsys.com/full-disclosure-charter.html

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