Exploit the possiblities

Secunia Security Advisory 39576

Secunia Security Advisory 39576
Posted Apr 23, 2010
Authored by Secunia | Site secunia.com

Secunia Security Advisory - Some vulnerabilities have been reported in libESMTP, which can be exploited by malicious people to conduct spoofing attacks.

tags | advisory, spoof, vulnerability
MD5 | 7637243c9e121a6adc3eb26426b883fe

Secunia Security Advisory 39576

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http://secunia.com/vulnerability_scanning/corporate/wsus_sccm_3rd_third_party_patching/


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TITLE:
libESMTP Two Spoofing Vulnerabilities

SECUNIA ADVISORY ID:
SA39576

VERIFY ADVISORY:
http://secunia.com/advisories/39576/

DESCRIPTION:
Some vulnerabilities have been reported in libESMTP, which can be
exploited by malicious people to conduct spoofing attacks.

1) An error when processing Common Name (CN) certificate fields
containing NULL ('\0') characters can be exploited to e.g. conduct
Man-in-the-Middle (MitM) attacks via specially crafted certificates.

2) An error within the "match_component()" function in smtp-tls.c
when matching subjectAltName certificate fields can be exploited to
e.g. conduct Man-in-the-Middle (MitM) attacks.

The vulnerabilities are reported in version 1.0.4. Other versions may
also be affected.

SOLUTION:
Apply patch.
http://www.openwall.com/lists/oss-security/2010/03/17/3

PROVIDED AND/OR DISCOVERED BY:
1) Kees Cook
2) Martin Lambers

ORIGINAL ADVISORY:
1) http://www.openwall.com/lists/oss-security/2010/03/03/6
2) http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=311191

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About:
This Advisory was delivered by Secunia as a free service to help
private users keeping their systems up to date against the latest
vulnerabilities.

Subscribe:
http://secunia.com/advisories/secunia_security_advisories/

Definitions: (Criticality, Where etc.)
http://secunia.com/advisories/about_secunia_advisories/


Please Note:
Secunia recommends that you verify all advisories you receive by
clicking the link.
Secunia NEVER sends attached files with advisories.
Secunia does not advise people to install third party patches, only
use those supplied by the vendor.

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