PT-2009-6005 · Openssl+1 · Openssl+1

Published 2009-10-23 · Updated 2009-10-29 · CVE-2009-3765

Positive Technologies (AI Summary)

CVSS v2.0

6.8

Medium

Base vector

AV:N/AC:M/Au:N/C:P/I:P/A:P

Name of the Vulnerable Software and Affected Versions mutt versions 1.5.19 through 1.5.20

Description The issue arises from improper handling of a '0' character in a domain name within the subject's Common Name (CN) field of an X.509 certificate when OpenSSL is used. This allows man-in-the-middle attackers to spoof arbitrary SSL servers via a crafted certificate issued by a legitimate Certification Authority.

Recommendations For mutt versions 1.5.19 and 1.5.20, consider updating to a version that properly handles '0' characters in domain names to prevent SSL server spoofing. At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Weakness Enumeration

CWE-310

Related Identifiers

CVE-2009-3765

Affected Products

Openssl

Mutt

References · 5

• https://nvd.nist.gov/vuln/detail/CVE-2009-3765 · Security Note
• http://lists.opensuse.org/opensuse-security-announce/2009-10/msg00001.html · Vendor Advisory
• http://marc.info/?l=oss-security&m=125369675820512&w=2 · Note
• http://marc.info/?l=oss-security&m=125198917018936&w=2 · Note
• http://dev.mutt.org/trac/changeset/6016:dc09812e63a3/mutt_ssl.c · Note