Pavel Kankovsky discovered several heap overflow flaw in the imlib image handler. An attacker could create a carefully crafted image file in such a way that it could cause an application linked with imlib to execute arbitrary code when the file was opened by a user (CVE-2004-1025).

As well, Pavel also discovered several integer overflows in imlib.
These could allow an attacker, creating a carefully crafted image file, to cause an application linked with imlib to execute arbitrary code or crash (CVE-2004-1026).

The updated packages have been patched to prevent these problems.

Pavel Kankovsky discovered that several overflows found in the libXpm library were also present in imlib, an imaging library for X and X11.
An attacker could create a carefully crafted image file in such a way that it could cause an application linked with imlib to execute arbitrary code when the file was opened by a victim. The Common Vulnerabilities and Exposures project identifies the following problems :

  - CAN-2004-1025     Multiple heap-based buffer overflows.

  - CAN-2004-1026

    Multiple integer overflows.

Updated imlib packages that fix several integer and buffer overflows are now available.

[Updated Dec 22, 2004] Added multilib packages to the Itanium, PPC, AMD64/Intel EM64T, and IBM eServer zSeries architectures for Red Hat Enterprise Linux version 3.

The imlib packages contain an image loading and rendering library.

Pavel Kankovsky discovered several heap overflow flaws that were found in the imlib image handler. An attacker could create a carefully crafted image file in such a way that it could cause an application linked with imlib to execute arbitrary code when the file was opened by a victim. The Common Vulnerabilities and Exposures project (cve.mitre.org) has assigned the name CVE-2004-1025 to this issue.

Additionally, Pavel discovered several integer overflow flaws that were found in the imlib image handler. An attacker could create a carefully crafted image file in such a way that it could cause an application linked with imlib to execute arbitrary code or crash when the file was opened by a victim. The Common Vulnerabilities and Exposures project (cve.mitre.org) has assigned the name CVE-2004-1026 to this issue.

Users of imlib should update to these updated packages, which contain backported patches and are not vulnerable to this issue.

Pavel Kankovsky reports :

Imlib affected by a variant of CAN-2004-0782 too.

I've discovered more vulnerabilities in Imlib (1.9.13). In particular, it appears to be affected by a variant of Chris Evans' libXpm flaw #1 (CAN-2004-0782, see http://scary.beasts.org/security/CESA-2004-003.txt). Look at the attached image, it kills ee on my 7.3.

The flaws also affect imlib2.

The remote host is affected by the vulnerability described in GLSA-200501-19 (imlib2: Buffer overflows in image decoding)

    Pavel Kankovsky discovered that several buffer overflows found in     the libXpm library (see GLSA 200409-34) also apply to imlib (see GLSA     200412-03) and imlib2. He also fixed a number of other potential     security vulnerabilities.
  Impact :

    A remote attacker could entice a user to view a carefully-crafted     image file, which would potentially lead to the execution of arbitrary     code with the rights of the user viewing the image. This affects any     program that utilizes of the imlib2 library.
  Workaround :

    There is no known workaround at this time.

The remote host is affected by the vulnerability described in GLSA-200412-03 (imlib: Buffer overflows in image decoding)

    Pavel Kankovsky discovered that several overflows found in the     libXpm library (see GLSA 200409-34) also applied to imlib. He also     fixed a number of other potential flaws.
  Impact :

    A remote attacker could entice a user to view a carefully-crafted     image file, which would potentially lead to execution of arbitrary code     with the rights of the user viewing the image. This affects any program     that makes use of the imlib library.
  Workaround :

    There is no known workaround at this time.

Pavel Kankovsky discovered that several overflows found in the libXpm library were also present in imlib and imlib2, imaging libraries for X11. An attacker could create a carefully crafted image file in such a way that it could cause an application linked with imlib or imlib2 to execute arbitrary code when the file was opened by a victim. The Common Vulnerabilities and Exposures project identifies the following problems :

  - CAN-2004-1025     Multiple heap-based buffer overflows. No such code is     present in imlib2.

  - CAN-2004-1026

    Multiple integer overflows in the imlib library.

Pavel Kankovsky discovered several buffer overflows in imlib. If an attacker tricked a user into loading a malicious image, he could exploit this to execute arbitrary code in the context of the user opening the image.

Note that Tenable Network Security has extracted the preceding description block directly from the Ubuntu security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

Recently, Pavel Kankovsky discovered several buffer overflows in imlib which were fixed in USN-53-1. It was found that imlib2 was vulnerable to similar issues.

If an attacker tricked a user into loading a malicious XPM or BMP image, he could exploit this to execute arbitrary code in the context of the user opening the image.

These vulnerabilities might also lead to privilege escalation if a privileged server process is using this library; for example, a PHP script on the web server which does automatic image processing might use the php-imlib package, in which case a remote attacker could possibly execute arbitrary code with the web server's privileges.

Note that Tenable Network Security has extracted the preceding description block directly from the Ubuntu security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

ID	名稱	產品	系列	已發布	已更新	嚴重性
16158	Mandrake Linux Security Advisory : imlib (MDKSA-2005:007)	Nessus	Mandriva Local Security Checks	2005/1/13	2021/1/6	critical
16049	Debian DSA-618-1 : imlib - buffer overflows, integer overflows	Nessus	Debian Local Security Checks	2004/12/27	2021/1/4	critical
15947	RHEL 2.1 / 3 : imlib (RHSA-2004:651)	Nessus	Red Hat Local Security Checks	2004/12/13	2021/1/14	critical
18864	FreeBSD : imlib -- xpm heap buffer overflows and integer overflows (2001103a-6bbd-11d9-851d-000a95bc6fae)	Nessus	FreeBSD Local Security Checks	2005/7/13	2021/1/6	critical
16410	GLSA-200501-19 : imlib2: Buffer overflows in image decoding	Nessus	Gentoo Local Security Checks	2005/2/14	2021/1/6	critical
15913	GLSA-200412-03 : imlib: Buffer overflows in image decoding	Nessus	Gentoo Local Security Checks	2004/12/6	2021/1/6	critical
16106	Debian DSA-628-1 : imlib2 - integer overflows	Nessus	Debian Local Security Checks	2005/1/6	2021/1/4	critical
20671	Ubuntu 4.10 : imlib+png2 vulnerabilities (USN-53-1)	Nessus	Ubuntu Local Security Checks	2006/1/15	2021/1/19	critical
20673	Ubuntu 4.10 : imlib2 vulnerabilities (USN-55-1)	Nessus	Ubuntu Local Security Checks	2006/1/15	2021/1/19	critical

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