Asterisk ast_verbose logging API call and astman_append() denial of service
| asterisk-astverbose-dos (41301) |  Low Risk |
Description:
Asterisk is vulnerable to a denial of service, caused by a format string error in the ast_verbose logging API and the astman_append() function. A remote attacker could exploit this vulnerability via a specially-crafted character string to crash the application.
*CVSS:
| Base Score: | 5 |
| Access Vector: | Network |
| Access Complexity: | Low |
| Authentication: | None |
| Confidentiality Impact: | None |
| Integrity Impact: | None |
| Availability Impact: | Partial |
| Temporal Score: | 3.7 |
| Exploitability: | Unproven |
| Remediation Level: | Official-Fix |
| Report Confidence: | Confirmed |
Consequences:
Denial of Service
Remedy:
Refer to AST-2008-004 for patch, upgrade or suggested workaround information. See References.
References:
- AST-2008-004: Format String Vulnerability in Logger and Manager.
- BID-28311: Asterisk Logger and Manager Format String Vulnerabilities
- CVE-2008-1333: Format string vulnerability in Asterisk Open Source 1.6.x before 1.6.0-beta6 might allow remote attackers to execute arbitrary code via logging messages that are not properly handled by (1) the ast_verbose logging API call, or (2) the astman_append function.
- DSA-1525: asterisk -- several vulnerabilities
- SA29426: Asterisk Multiple Vulnerabilities
- SECTRACK ID: 1019630: Asterisk Format String Bug in Logger and Manager Lets Remote Users Deny Service
- VUPEN/ADV-2008-0928: Asterisk Products Buffer Overflow and Security Bypass Vulnerabilities
Platforms Affected:
- Debian Debian Linux 4.0
- Digium Asterisk Open Source 1.6.x prior to 1.6.0-beta6
Reported:
Mar 18, 2008
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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.