Asterisk process_sdp() function buffer overflow
| asterisk-processsdp-bo (33895) |  High Risk |
Description:
Asterisk is vulnerable to multiple stack-based buffer overflows, caused by improper bounds checking by the process_sdp() function of chan_sip.c. By sending a specially-crafted SIP packet with overly long T38FaxRateManagement or T38FaxUdpEC SDP parameters, a remote attacker could overflow a buffer and execute arbitrary code on the system or cause the application to crash.
*CVSS:
| Base Score: | 7 |
| Access Vector: | Remote |
| Access Complexity: | Low |
| Authentication: | Not Required |
| Confidentiality Impact: | Partial |
| Integrity Impact: | Partial |
| Availability Impact: | Partial |
| Temporal Score: | 5.2 |
| Exploitability: | Unproven |
| Remediation Level: | Official-Fix |
| Report Confidence: | Confirmed |
Consequences:
Gain Access
Remedy:
Refer to ASA-2007-010 for patch, upgrade or suggested workaround information. See References.
References:
- ASA-2007-010: Two stack buffer overflows in SIP channel's T.38 SDP parsing code.
- Asterisk Web site: Asterisk- Downloads.
- Full-Disclosure Mailing List, Tue Apr 24 2007 - 18:20:26 CDT: ASA-2007-010: Two stack buffer overflows in SIP channel's T.38 SDP parsing code.
- Full-Disclosure Mailing List, Wed Jul 04 2007 - 10:47:14 CDT: Multiple Remote unauthenticated stack overflows in Asterisk chan_sip.c.
- BID-23648: Asterisk SIP T.38 SDP Parsing Remote Stack Buffer Overflow Vulnerabilities
- CVE-2007-2293: Multiple stack-based buffer overflows in the process_sdp function in chan_sip.c of the SIP channel T.38 SDP parser in Asterisk before 1.4.3 allow remote attackers to execute arbitrary code via a long (1) T38FaxRateManagement or (2) T38FaxUdpEC SDP parameter in an SIP message, as demonstrated using SIP INVITE.
- OSVDB ID: 35368: Asterisk T.38 SDP Parser chan_sip.c process_sdp Function Overflow
- SA24977: Asterisk T.38 SDP Buffer Overflows and Management Interface Denial of Service
- SECTRACK ID: 1017951: Asterisk Buffer Overflow in SIP/SDP T.38 Support Lets Remote Users Execute Arbitrary Code
- SECTRACK ID: 1018337: Asterisk Stack Overflows in `chan_sip.c` Let Remote Users Execute Arbitrary Code
- VUPEN/ADV-2007-1534: Asterisk Packets Handling Remote Buffer Overflow and Denial of Service Vulnerabilities
Platforms Affected:
- Digium Asterisk Appliance Developer Kit 0.4.0
- Digium Asterisk Business Edition A.x.x
- Digium Asterisk Business Edition B.x.x
- Digium Asterisk Open Source 1.4.3
- Digium AsteriskNOW Beta6 and prior
Reported:
Apr 25, 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.