Asterisk ast_uri_encode() buffer overflow
|asterisk-asturiencode-bo (64831)||High Risk|
Asterisk is vulnerable to a stack-based buffer overflow, caused by improper bounds checking by the ast_uri_encode() function. If the SIP channel driver is configured with the pedantic option enabled, a remote attacker could send a specially-crafted caller ID information to overflow a buffer and execute arbitrary code on the system or cause the application to crash.
Refer to AST-2011-001 for patch, upgrade or suggested workaround information. See References.
- AST-2011-001: Stack buffer overflow in SIP channel driver.
- BID-45839: Asterisk SIP Channel Driver Stack Buffer Overflow Vulnerability
- CVE-2011-0495: Stack-based buffer overflow in the ast_uri_encode function in main/utils.c in Asterisk Open Source before 220.127.116.11, 18.104.22.168, 22.214.171.124, 126.96.36.199.1, 188.8.131.52.1, 184.108.40.206, 1.8.2.; and Business Edition before C.3.6.2; when running in pedantic mode allows remote authenticated users to execute arbitrary code via crafted caller ID data in vectors involving the (1) SIP channel driver, (2) URIENCODE dialplan function, or (3) AGI dialplan function.
- DSA-2171: asterisk -- buffer overflow
- OSVDB ID: 70518: Asterisk main/utils.c ast_uri_encode() Function Caller ID Information Overflow
- SA42935: Asterisk ast_uri_encode() Buffer Overflow Vulnerability
- Digium Asterisk Open Source 1.4.38 rc1
- Digium Asterisk Open Source 1.4.39 rc1
- Digium Asterisk Open Source 220.127.116.11 rc2
- Digium Asterisk Open Source 18.104.22.168 rc1
- Digium Asterisk Open Source 22.214.171.124 rc1
- Digium Asterisk Open Source 126.96.36.199
- Digium Asterisk Open Source 188.8.131.52
Jan 18, 2011
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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.