FreeBSD libarchive NULL pointer pax denial of service
| freebsd-libarchive-null-pax-dos (35404) |  Medium 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.
*CVSS:
| Base Score: | 2.8 |
| Access Vector: | Remote |
| Access Complexity: | High |
| Authentication: | Not Required |
| Confidentiality Impact: | None |
| Integrity Impact: | None |
| Availability Impact: | Partial |
| Temporal Score: | 2.1 |
| Exploitability: | Unproven |
| Remediation Level: | Official-Fix |
| Report Confidence: | Confirmed |
Consequences:
Denial of Service
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.
References:
- FreeBSD-SA-07:05.libarchive : Errors handling corrupt tar files in libarchive(3).
- libarchive Web page: libarchive, bsdtar, pkg_add.
- 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
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
Reported:
Jul 12, 2007
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For corrections or additions please email xforce@iss.net
* According to the Forum of Incident Response and Security Teams (FIRST), the Common Vulnerability Scoring System (CVSS) is an "industry open standard designed to convey vulnerability severity and help to determine urgency and priority of response." IBM PROVIDES THE CVSS SCORES "AS IS" WITHOUT WARRANTY OF ANY KIND, INCLUDING THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. CUSTOMERS ARE RESPONSIBLE FOR ASSESSING THE IMPACT OF ANY ACTUAL OR POTENTIAL SECURITY VULNERABILITY.
The information within this database may change without notice. Use of this information constitutes acceptance for use in an AS IS condition. There are NO warranties, implied or otherwise, with regard to this information or its use. Any use of this information is at the user's risk. In no event shall IBM be held liable for any damages whatsoever arising out of or in connection with the use or spread of this information.