Home / vulnerabilities Secunia Security Advisory 51098
Posted on 27 October 2012
Source : packetstormsecurity.org Link
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TITLE:
Exim DKIM DNS Decoding Buffer Overflow Vulnerability
SECUNIA ADVISORY ID:
SA51098
VERIFY ADVISORY:
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http://secunia.com/advisories/51098/
Customer Area (Credentials Required)
https://ca.secunia.com/?page=viewadvisory&vuln_id=51098
RELEASE DATE:
2012-10-26
DISCUSS ADVISORY:
http://secunia.com/advisories/51098/#comments
AVAILABLE ON SITE AND IN CUSTOMER AREA:
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* Impact
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* CVE Reference(s)
http://secunia.com/advisories/51098/
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https://ca.secunia.com/?page=viewadvisory&vuln_id=51098
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http://secunia.com/vulnerability_scanning/personal/
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DESCRIPTION:
A vulnerability has been reported in Exim, which can be exploited by
malicious people to compromise a vulnerable system.
The vulnerability is caused due to an error in the
"dkim_exim_query_dns_txt()" function (src/dkim.c) when processing a
DNS record. This can be exploited to cause a heap-based buffer
overflow via an email from a domain where the attacker controls DNS.
Successful exploitation may allow execution of arbitrary code, but
requires the application to be built with DKIM support (default) and
that ACL "warn control = dkim_disable_verify" is not enabled in
"acl_smtp_connect" or "acl_smtp_rcpt".
The vulnerability is reported in versions 4.70 through 4.80.
SOLUTION:
Update to version 4.80.1.
PROVIDED AND/OR DISCOVERED BY:
Reported by the vendor.
ORIGINAL ADVISORY:
https://lists.exim.org/lurker/message/20121026.080330.74b9147b.en.html
OTHER REFERENCES:
Further details available in Customer Area:
http://secunia.com/vulnerability_intelligence/
DEEP LINKS:
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EXTENDED DESCRIPTION:
Further details available in Customer Area:
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EXTENDED SOLUTION:
Further details available in Customer Area:
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EXPLOIT:
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http://secunia.com/vulnerability_intelligence/
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