(Slackware Issues Fix) libpng Memory Access Violation When Creating Error Messages May Cause Denial of Service Conditions
|
|
SecurityTracker Alert ID: 1010049 |
|
SecurityTracker URL: http://securitytracker.com/id/1010049
|
|
CVE Reference:
CAN-2004-0421
(Links to External Site)
|
Date: May 4 2004
|
Impact:
Denial of service via network
|
Fix Available: Yes Vendor Confirmed: Yes
|
|
Description:
A vulnerability was reported in libpng. A remote user can create a PNG image that, when processed by libpng, may cause denial of service conditions.
Mandrake reported that when libpng creates an error message, libpng may access invalid memory locations. As a result, an application using libpng may crash or core dump when processing certain PNG images, the report said.
Steve Grubb is credited with discovering this flaw.
|
Impact:
A remote user can create a malformed PNG image that, when processed by an application using libpng, may cause the application to crash. The specific impact depends on the application using libpng.
|
Solution:
Slackware has released a fix.
Updated package for Slackware 9.0:
ftp://ftp.slackware.com/pub/slackware/slackware-9.0/patches/packages/libpng-1.2.5-i386-2.tgz
Updated package for Slackware 9.1:
ftp://ftp.slackware.com/pub/slackware/slackware-9.1/patches/packages/libpng-1.2.5-i486-2.tgz
Updated package for Slackware -current:
ftp://ftp.slackware.com/pub/slackware/slackware-current/slackware/l/libpng-1.2.5-i486-2.tgz
The MD5 signatures are:
Slackware 9.0 package:
6c68e6a65850e26b60651d65fd8c0a2f libpng-1.2.5-i386-2.tgz
Slackware 9.1 package:
781c7e61997c34c5c70855be40012bb9 libpng-1.2.5-i486-2.tgz
Slackware -current package:
476b916ded315a2eba0af3c6637d770b libpng-1.2.5-i486-2.tgz
|
Vendor URL: www.libpng.org/pub/png/libpng.html (Links to External Site)
|
Cause:
Access control error, Resource error
|
Underlying OS:
Linux (Slackware)
|
|
Message History:
This archive entry is a follow-up to the message listed below.
|
Source Message Contents
|
Date: Mon, 3 May 2004 13:08:30 -0700 (PDT)
Subject: [slackware-security] libpng update (SSA:2004-124-04)
|
-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1
[slackware-security] libpng update (SSA:2004-124-04)
New libpng packages are available for Slackware 9.0, 9.1, and -current to
fix an issue where libpng could be caused to crash, perhaps creating a denial
of service issue if network services are linked with it.
More details about this issue may be found in the Common
Vulnerabilities and Exposures (CVE) database:
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-0421
Here are the details from the Slackware 9.1 ChangeLog:
+--------------------------+
Sun May 2 17:16:41 PDT 2004
patches/packages/libpng-1.2.5-i486-2.tgz: Patched a problem where
libpng may access memory that is out of bounds when creating an error
message, possibly crashing libpng and creating a denial of service.
For more details, see:
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-0421
(* Security fix *)
+--------------------------+
Where to find the new packages:
+-----------------------------+
Updated package for Slackware 9.0:
ftp://ftp.slackware.com/pub/slackware/slackware-9.0/patches/packages/libpng-1.2.5-i386-2.tgz
Updated package for Slackware 9.1:
ftp://ftp.slackware.com/pub/slackware/slackware-9.1/patches/packages/libpng-1.2.5-i486-2.tgz
Updated package for Slackware -current:
ftp://ftp.slackware.com/pub/slackware/slackware-current/slackware/l/libpng-1.2.5-i486-2.tgz
MD5 signatures:
+-------------+
Slackware 9.0 package:
6c68e6a65850e26b60651d65fd8c0a2f libpng-1.2.5-i386-2.tgz
Slackware 9.1 package:
781c7e61997c34c5c70855be40012bb9 libpng-1.2.5-i486-2.tgz
Slackware -current package:
476b916ded315a2eba0af3c6637d770b libpng-1.2.5-i486-2.tgz
Installation instructions:
+------------------------+
Upgrade the package as root:
# upgradepkg libpng-1.2.5-i486-2.tgz
+-----+
Slackware Linux Security Team
http://slackware.com/gpg-key
security@slackware.com
+------------------------------------------------------------------------+
| To leave the slackware-security mailing list: |
+------------------------------------------------------------------------+
| Send an email to majordomo@slackware.com with this text in the body of |
| the email message: |
| |
| unsubscribe slackware-security |
| |
| You will get a confirmation message back containing instructions to |
| complete the process. Please do not reply to this email address. |
+------------------------------------------------------------------------+
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.2.4 (GNU/Linux)
iD8DBQFAlqIvakRjwEAQIjMRAqNdAJ4rFTsTn1IZYw+31dnqwJckwm1lUwCfRGJL
1L0otF2hHROUBxwTlH2YHvY=
=0HkD
-----END PGP SIGNATURE-----
|
|
