Avahi assert() function denial of service
| avahi-assert-dos (35036) |  Medium Risk |
Description:
Avahi is vulnerable to a denial of service, caused by an assert() function error. By sending empty TXT data over D-Bus for registration, a local attacker could exploit this vulnerability to crash the Avahi daemon.
*CVSS:
| Base Score: | 3.5 |
| Access Vector: | Local |
| Access Complexity: | Low |
| Authentication: | Not Required |
| Confidentiality Impact: | None |
| Integrity Impact: | None |
| Availability Impact: | Complete |
| Temporal Score: | 2.6 |
| Exploitability: | Unproven |
| Remediation Level: | Official-Fix |
| Report Confidence: | Confirmed |
Consequences:
Denial of Service
Remedy:
Upgrade to the latest version of Avahi (0.6.20 or later), available from the Avahi Web site. See References.
For SUSE Linux:
Refer to SUSE-SR:2007-014 for patch, upgrade, or suggested workaround information. See References.
For Mandriva Linux (avahi):
Refer to MDKSA-2007:185 for patch, upgrade, or suggested workaround information. See References.
For other distributions:
Contact your vendor for upgrade or patch information.
References:
- Avahi Web site, 06/22/07 18:45:04: Milestone Avahi 0.6.20.
- BID-24614: Avahi Empty TXT Data Denial Of Service Vulnerability
- CVE-2007-3372: The Avahi daemon in Avahi before 0.6.20 allows attackers to cause a denial of service (exit) via empty TXT data over D-Bus, which triggers an assert error.
- DSA-1690: avahi -- assert errors
- MDKSA-2007:185: Updated avahi packages fix vulnerability
- SA25811: Avahi Empty TXT Data Denial of Service
- SECTRACK ID: 1018706: Avahi Can Be Crashed By Local Users Sending Empty TXT Data
- SUSE-SR:2007:014: SUSE Security Summary Report
- USN-696-1: Avahi vulnerabilities
- VUPEN/ADV-2007-2317: Avahi avahi_string_list_add_arbitrary() Empty TXT Data Denial of Service Vulnerability
Platforms Affected:
- Avahi Team Avahi prior to 0.6.20
- Canonical Ubuntu 6.06 LTS
- Canonical Ubuntu 7.10
- Canonical Ubuntu 8.04 LTS
- Canonical Ubuntu 8.10
- Debian Debian Linux 4.0
- MandrakeSoft Mandrake Linux 2007 X86_64
- MandrakeSoft Mandrake Linux 2007
- MandrakeSoft Mandrake Linux 2007.1
- MandrakeSoft Mandrake Linux 2007.1 X86_64
- MandrakeSoft Mandrake Linux 2008.0 X86_64
- Novell SUSE Linux Enterprise Server 10
- SUSE SuSE Linux 10.1
Reported:
Jun 22, 2007
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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.