Exim require_verify buffer overflow
| exim-requireverify-bo (16079) |  High Risk |
Description:
Exim is vulnerable to a stack-based buffer overflow, caused by improper bounds checking. If the verify = header_syntax setting is enabled in the exim.conf configuration file, which is not the default setting, a remote attacker could exploit this vulnerability to overflow a buffer and possibly execute arbitrary code on the vulnerable system.
Platforms Affected:
- Cambridge University, Exim 4.32
- Debian, Debian Linux 3.0
Remedy:
For Debian GNU/Linux 3.0 (woody):
Upgrade to the latest version of exim (3.35-3woody2 or later), as listed in DSA-502-1. See References.
Consequences:
Gain Access
References:
- Full-Disclosure Mailing List, Thu May 06 2004 - 06:10:31 CDT, Buffer overflows in exim, yet still exim much better than windows at http://archives.neohapsis.com/archives/fulldisclosure/2004-05/0264.html.
- BID-10291: Exim Header Syntax Checking Remote Stack Buffer Overrun Vulnerability
- CVE-2004-0399: Stack-based buffer overflow in Exim 3.35, and other versions before 4, when the sender_verify option is true, allows remote attackers to cause a denial of service and possibly execute arbitrary code during sender verification.
- DSA-501: exim -- buffer overflow
- DSA-502: exim-tls -- buffer overflow
- SA11558: Exim Buffer Overflow Vulnerabilities
Reported:
May 06, 2004
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