UnRAR password-protected archive buffer overflow
| unrar-password-archive-bo (32357) |  High Risk |
Description:
UnRAR is vulnerable to a stack-based buffer overflow, caused by improper bounds checking in the command line utility. By persuading a victim to open a specially-crafted password-protected archive, a remote attacker could overflow a buffer and execute arbitrary code on the system with the privileges of the victim, once the victim enters a password. An attacker could exploit this vulnerability by sending the malicious archive to a victim as an email attachment or by hosting it on a Web site.
Note: This vulnerability does not affect the Windows GUI-based version of UnRAR.
*CVSS:
| Base Score: | 8 |
| Access Vector: | Remote |
| Access Complexity: | High |
| Authentication: | Not Required |
| Confidentiality Impact: | Complete |
| Integrity Impact: | Complete |
| Availability Impact: | Complete |
| Temporal Score: | 5.9 |
| Exploitability: | Unproven |
| Remediation Level: | Official-Fix |
| Report Confidence: | Confirmed |
Consequences:
Gain Access
Remedy:
Upgrade to the latest version of UnRAR (3.70 beta or later), available from the UnRAR Web page. See References.
For Gentoo Linux:
Refer to GLSA 200702-04 for patch, upgrade, or suggested workaround information. See References.
References:
- iDefense Labs PUBLIC ADVISORY: 02.07.07: RARLabs Unrar Password Prompt Buffer Overflow Vulnerability.
- UnRAR Web page: UnRAR.
- BID-22447: RARLAB Unrar Password Protected Archives Buffer Overflow Vulnerability
- CVE-2007-0855: Stack-based buffer overflow in RARLabs Unrar, as packaged in WinRAR and possibly other products, allows user-assisted remote attackers to execute arbitrary code via a crafted, password-protected archive.
- GLSA-200702-04: RAR, UnRAR: Buffer overflow
- SA24077: RARLabs UnRAR Password Prompt Buffer Overflow Vulnerability
- SECTRACK ID: 1017593: UnRAR Stack Overflow in Processing Password Protected Archives Lets Remote Users Execute Arbitrary Code
- SUSE-SR:2007:005: SUSE Security Summary Report
- VUPEN/ADV-2007-0523: RARLabs unRAR Password Prompt Handling Client-Side Buffer Overflow Vulnerability
Platforms Affected:
- Eugene Roshal UnRAR prior to 3.70 beta
- Gentoo Linux
Reported:
Feb 07, 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.