FreeBSD libarchive NULL pointer pax denial of service
| freebsd-libarchive-null-pax-dos (35404) |  Low Risk |
Description:
The FreeBSD libarchive library is vulnerable to a denial of service, caused by a NULL pointer dereference. By persuading a victim to open a specially-crafted archive file with a malicious pax extension header, a remote attacker could exploit this vulnerability to cause the application to enter into an infinite loop, resulting in a denial of service.
Platforms Affected:
- Debian, Debian Linux 4.0
- FreeBSD, FreeBSD 5.5
- FreeBSD, FreeBSD 6.1
- FreeBSD, FreeBSD 6.2
- FreeBSD, libarchive 2.2.3
- Gentoo, Linux
- SuSE, SuSE Linux
Remedy:
Refer to FreeBSD-SA-07:05.libarchive for patch, upgrade, or suggested workaround information. See References.
For Gentoo Linux (libarchive):
Refer to GLSA 200708-03 for patch, upgrade, or suggested workaround information. See References.
For SUSE Linux:
Refer to SUSE-SR:2007:015 for patch, upgrade, or suggested workaround information. See References.
For other distributions:
Contact your vendor for upgrade or patch information.
Consequences:
Denial of Service
References:
- FreeBSD-SA-07:05.libarchive , Errors handling corrupt tar files in libarchive(3) at http://security.freebsd.org/advisories/FreeBSD-SA-07:05.libarchive.asc.
- libarchive Web page, libarchive, bsdtar, pkg_add at http://people.freebsd.org/~kientzle/libarchive/.
- BID-24885: 'libarchive' Multiple Remote Vulnerabilities
- CVE-2007-3645: archive_read_support_format_tar.c in libarchive before 2.2.4 allows user-assisted remote attackers to cause a denial of service (crash) via (1) an end-of-file condition within a tar header that follows a pax extension header or (2) a malformed pax extension header in an (a) PAX or a (b) TAR archive, which results in a NULL pointer dereference, a different issue than CVE-2007-3644.
- DSA-1455: libarchive -- denial of service
- GLSA-200708-03: libarchive (formerly named as bsdtar): Multiple PaX Extension Header Vulnerabilities
- SA26050: libarchive pax Extension Header Denial of Service and Buffer Overflow
- SECTRACK ID: 1018379: libarchive Tar/Pax Processing Bugs Let Remote Users Deny Service or Execute Arbitrary Code
- SUSE-SR:2007:015: SUSE Security Summary Report
- VUPEN/ADV-2007-2521: Libarchive Pax Extension Header Processing Code Execution and DoS Vulnerabilities
Reported:
Jul 12, 2007
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For corrections or additions please email xforce@iss.net