[OpenPKG-SA-2004.021] OpenPKG Security Advisory (apache)
From: OpenPKG (openpkg_at_openpkg.org)
Date: 05/12/04
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Date: Wed, 12 May 2004 14:56:03 +0200 To: bugtraq@securityfocus.com
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________________________________________________________________________
OpenPKG Security Advisory The OpenPKG Project
http://www.openpkg.org/security.html http://www.openpkg.org
openpkg-security@openpkg.org openpkg@openpkg.org
OpenPKG-SA-2004.021 12-May-2004
________________________________________________________________________
Package: apache
Vulnerability: privilege escalation, denial of service
OpenPKG Specific: no
Affected Releases: Affected Packages: Corrected Packages:
OpenPKG CURRENT <= apache-1.3.29-20040421 >= apache-1.3.31-20040511
OpenPKG 2.0 <= apache-1.3.29-2.0.0 >= apache-1.3.29-2.0.1
OpenPKG 1.3 <= apache-1.3.28-1.3.2 >= apache-1.3.28-1.3.3
Dependent Packages: none
Description:
With the release of the Apache HTTP Server [0] version 1.3.31, four
security issues were fixed [1]:
1. Access Control List (ACL) Handling:
mod_access in Apache 1.3 before 1.3.30, when running on big-endian
64-bit platforms, did not properly parse Allow/Deny rules using IP
addresses without a netmask. This could allow remote attackers to
bypass intended access restrictions. The Common Vulnerabilities and
Exposures (CVE) project assigned the id CAN-2003-0993 [2] to the
problem.
2. Error Log Escape Sequence Filtering:
Apache 1.3 before 1.3.30 did not filter terminal escape sequences
from its error logs. This could make it easier for attackers
to insert those sequences into the terminal emulators (of
administrators viewing the error logs) containing vulnerabilities
related to escape sequence handling. The Common Vulnerabilities and
Exposures (CVE) project assigned the id CAN-2003-0020 [3] to the
problem.
3. Nonce Verification in Digest Authentication:
mod_digest in Apache 1.3 before 1.3.31 did not properly verify the
nonce of a client response by using a AuthNonce secret. Apache
now verifies the nonce returned in the client response to check
whether it was issued by itself by means of a "AuthDigestRealmSeed"
secret exposed as an MD5 checksum. The Common Vulnerabilities and
Exposures (CVE) project assigned the id CAN-2003-0987 [4] to the
problem.
4. Starvation Issue in Serialized accept(2) Handling:
Apache 1.3 before 1.3.30, when using multiple listening sockets
on certain platforms, allows remote attackers to cause a Denial
of Service (blocked new connections) via a short-lived connection
on a rarely-accessed listening socket. This starvation situation
caused a child to hold the accept(2) mutual exclusion lock and
block out new connections (on any socket) until another connection
arrives on that rarely-accessed listening socket. The source of
the problem seems to be that under some Unix platforms accept(2)
unexpectedly blocks after select(2) flagged a socket as readable.
The Common Vulnerabilities and Exposures (CVE) project assigned the
id CAN-2004-0174 [5] to the problem.
Please check whether you are affected by running "<prefix>/bin/rpm -q
apache". If you have the "apache" package installed and its version
is affected (see above), we recommend that you immediately upgrade it
(see Solution) [6][7].
Solution:
Select the updated source RPM appropriate for your OpenPKG release
[8][9], fetch it from the OpenPKG FTP service [10][11] or a mirror
location, verify its integrity [12], build a corresponding binary
RPM from it [6] and update your OpenPKG installation by applying the
binary RPM [7]. For the most recent release OpenPKG 2.0, perform the
following operations to permanently fix the security problem (for
other releases adjust accordingly).
$ ftp ftp.openpkg.org
ftp> bin
ftp> cd release/2.0/UPD
ftp> get apache-1.3.29-2.0.1.src.rpm
ftp> bye
$ <prefix>/bin/openpkg rpm -v --checksig apache-1.3.29-2.0.1.src.rpm
$ <prefix>/bin/openpkg rpm --rebuild apache-1.3.29-2.0.1.src.rpm
$ su -
# <prefix>/bin/openpkg rpm -Fvh <prefix>/RPM/PKG/apache-1.3.29-2.0.1.*.rpm
________________________________________________________________________
References:
[0] http://httpd.apache.org/
[1] http://www.apache.org/dist/httpd/CHANGES_1.3
[2] http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2003-0993
[3] http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2003-0020
[4] http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2003-0987
[5] http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-0174
[6] http://www.openpkg.org/tutorial.html#regular-source
[7] http://www.openpkg.org/tutorial.html#regular-binary
[8] ftp://ftp.openpkg.org/release/1.3/UPD/apache-1.3.28-1.3.3.src.rpm
[9] ftp://ftp.openpkg.org/release/2.0/UPD/apache-1.3.29-2.0.1.src.rpm
[10] ftp://ftp.openpkg.org/release/1.3/UPD/
[11] ftp://ftp.openpkg.org/release/2.0/UPD/
[12] http://www.openpkg.org/security.html#signature
________________________________________________________________________
For security reasons, this advisory was digitally signed with the
OpenPGP public key "OpenPKG <openpkg@openpkg.org>" (ID 63C4CB9F) of the
OpenPKG project which you can retrieve from http://pgp.openpkg.org and
hkp://pgp.openpkg.org. Follow the instructions on http://pgp.openpkg.org/
for details on how to verify the integrity of this advisory.
________________________________________________________________________
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