Asterisk get_input() function buffer overflow
| asterisk-getinput-bo (29663) |  High Risk |
Description:
Asterisk is vulnerable to a buffer overflow, caused by improper bounds checking by the get_input() chan_skinny.c function. By sending malformed data to TCP port 2000, a remote attacker could overflow a buffer and execute arbitrary code on the system with root privileges.
*CVSS:
| Base Score: | 10 |
| Access Vector: | Remote |
| Access Complexity: | Low |
| Authentication: | Not Required |
| Confidentiality Impact: | Complete |
| Integrity Impact: | Complete |
| Availability Impact: | Complete |
| Temporal Score: | 7.4 |
| Exploitability: | Unproven |
| Remediation Level: | Official-Fix |
| Report Confidence: | Confirmed |
Consequences:
Gain Access
Remedy:
Upgrade to the latest version of Asterisk (version 1.0.12 or 1.2.13 or later), available from the Asterisk Web site. See References.
For Gentoo Linux:
Refer to Gentoo Linux Security Announcement GLSA 200610-15 for patch, upgrade, or suggested workaround information. See References.
For Debian GNU/Linux:
Refer to DSA-1229-1 for patch, upgrade, or suggested workaround information. See References.
References:
- Asterisk Web site: Asterisk | The Open Source PBX.
- BugTraq Mailing List, Wed Oct 18 2006 - 16:56:02 CDT : Security-Assessment.com Advisory: Asterisk remote heap overflow.
- BID-20617: Asterisk Chan_Skinny Remote Buffer Overflow Vulnerability
- CVE-2006-5444: Integer overflow in the get_input function in the Skinny channel driver (chan_skinny.c) in Asterisk 1.0.x before 1.0.12 and 1.2.x before 1.2.13, as used by Cisco SCCP phones, allows remote attackers to execute arbitrary code via a certain dlen value that passes a signed integer comparison and leads to a heap-based buffer overflow.
- DSA-1229: asterisk -- integer overflow
- GLSA-200610-15: Asterisk: Multiple vulnerabilities
- OpenPKG-SA-2006.024: Asterisk
- OSVDB ID: 29972: Asterisk Skinny Channel Driver (chan_skinny) get_input Function Remote Overflow
- SA22480: Asterisk SCCP Integer Overflow and SIP Denial of Service Vulnerabilities
- SECTRACK ID: 1017089: Asterisk Integer Overflow in Skinny Channel Driver Lets Remote Users Execute Arbitrary Code
- SUSE-SA:2006:069: asterisk remote denial of service problem
- US-CERT VU#521252: Integer overflow vulnerability in Asterisk driver for Cisco SCCP-enabled phones
- VUPEN/ADV-2006-4097: Asterisk Skinny Channel Driver Data Handling Remote Code Execution Vulnerability
Platforms Affected:
- Debian Debian Linux 3.1
- Digium Asterisk Open Source 1.0.12
- Digium Asterisk Open Source 1.2.12.1
- Gentoo Linux
- SUSE SuSE Linux 10.1
- SuSE SuSE SLED 10
Reported:
Oct 18, 2006
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For corrections or additions please email xforce@iss.net
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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.