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Debian Security Advisory DSA 443-1 [EMAIL PROTECTED]
http://www.debian.org/security/ Matt Zimmerman
February 19th, 2004 http://www.debian.org/security/faq
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Package: xfree86
Vulnerability : several
Problem-Type : remote
Debian-specific: no
CVE Ids: CAN-2003-0690 CAN-2004-0083 CAN-2004-0084 CAN-2004-0106
CAN-2004-0093 CAN-2004-0094
A number of vulnerabilities have been discovered in XFree86:
CAN-2004-0083: Buffer overflow in ReadFontAlias from dirfile.c of
XFree86 4.1.0 through 4.3.0 allows local users and remote attackers to
execute arbitrary code via a font alias file (font.alias) with a long
token, a different vulnerability than CAN-2004-0084.
CAN-2004-0084: Buffer overflow in the ReadFontAlias function in XFree86
4.1.0 to 4.3.0, when using the CopyISOLatin1Lowered function, allows
local or remote authenticated users to execute arbitrary code via a
malformed entry in the font alias (font.alias) file, a different
vulnerability than CAN-2004-0083.
CAN-2004-0106: Miscellaneous additional flaws in XFree86's handling of
font files.
CAN-2003-0690: xdm does not verify whether the pam_setcred function call
succeeds, which may allow attackers to gain root privileges by
triggering error conditions within PAM modules, as demonstrated in
certain configurations of the MIT pam_krb5 module.
CAN-2004-0093, CAN-2004-0094: Denial-of-service attacks against the X
server by clients using the GLX extension and Direct Rendering
Infrastructure are possible due to unchecked client data (out-of-bounds
array indexes [CAN-2004-0093] and integer signedness errors
[CAN-2004-0094]).
Exploitation of CAN-2004-0083, CAN-2004-0084, CAN-2004-0106,
CAN-2004-0093 and CAN-2004-0094 would require a connection to the X
server. By default, display managers in Debian start the X server
with a configuration which only accepts local connections, but if the
configuration is changed to allow remote connections, or X servers are
started by other means, then these bugs could be exploited remotely.
Since the X server usually runs with root privileges, these bugs could
potentially be exploited to gain root privileges.
No attack vector for CAN-2003-0690 is known at this time.
For the stable distribution (woody) these problems have been fixed in
version 4.1.0-16woody3.
For the unstable distribution (sid) these problems have been fixed in
version 4.3.0-2.
We recommend that you update your xfree86 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
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Source archives:
http://security.debian.org/pool/updates/main/x/xfree86/xfree86_4.1.0-16woody3.dsc
Size/MD5 checksum: 1512 596b339b1a1ab8c1aeebe949a7e77076
http://security.debian.org/pool/updates/main/x/xfree86/xfree86_4.1.0-16woody3.diff.gz
Size/MD5 checksum: 1600904 d0ab158eaf2b1a49d17470b138e99fe8
http://security.debian.org/pool/updates/main/x/xfree86/xfree86_4.1.0.orig.tar.gz
Size/MD5 checksum: 54433247 ea7a32e6a81a850e9f19428f3104c300
Architecture independent components:
http://security.debian.org/pool/updates/main/x/xfree86/x-window-system_4.1.0-16woody3_all.deb
Size/MD5 checksum:60486 27fbccef0a1e87466eae49534b492f32
http://security.debian.org/pool/updates/main/x/xfree86/xfonts-100dpi-transcoded_4.1.0-16woody3_all.deb
Size/MD5 checksum: 8333716 23dcab5cbf8daffe02eb6cded5da96b4
http://security.debian.org/pool/updates/main/x/xfree86/xfonts-100dpi_4.1.0-16woody3_all.deb
Size/MD5 checksum: 4442612 379489c2b77427f1640525568e5ba4c0
http://security.debian.org/pool/updates/main/x/xfree86/xfonts-75dpi-transcoded_4.1.0-16woody3_all.deb
Size/MD5 checksum: 7225924 0e2b47660cbe103fbd67275e55c7da53
http://security.debian.org/pool/updates/main/x/xfree86/xfonts-75dpi_4.1.0-16woody3_all.deb
Size/MD5 checksum: 3931790 eb3ecbf1e2a453af48de6b9fb8e23f2f
http://security.debian.org/pool/updates/main/x/xfree86/xfonts-base-transcoded_4.1.0-16woody3_all.deb
Size/MD5 checksum: 1105542 30257b1f4ff435f24a1a96f0820f0119
http://security.debian.org/pool/updates/main/x/xfree86/xfonts-base_4.1.0-16woody3_all.deb
Size/MD5 checksum: 5028916 f0e09d48bd43a2ebdcb0da701a67ce7f
