Vulnerability CVE-2011-1720
Published: 2011-05-13   Modified: 2012-02-13

Description:
The SMTP server in Postfix before 2.5.13, 2.6.x before 2.6.10, 2.7.x before 2.7.4, and 2.8.x before 2.8.3, when certain Cyrus SASL authentication methods are enabled, does not create a new server handle after client authentication fails, which allows remote attackers to cause a denial of service (heap memory corruption and daemon crash) or possibly execute arbitrary code via an invalid AUTH command with one method followed by an AUTH command with a different method.

See advisories in our WLB2 database:
Topic
Author
Date
Med.
Memory corruption in Postfix SMTP server Cyrus SASL
wietse porcupine...
16.05.2011

Type:

CWE-119

 (Improper Restriction of Operations within the Bounds of a Memory Buffer)

CVSS2 => (AV:N/AC:M/Au:N/C:P/I:P/A:P)

CVSS Base Score
Impact Subscore
Exploitability Subscore
6.8/10
6.4/10
8.6/10
Exploit range
Attack complexity
Authentication
Remote
Medium
No required
Confidentiality impact
Integrity impact
Availability impact
Partial
Partial
Partial
Affected software
Postfix -> Postfix 

 References:
http://kb.juniper.net/InfoCenter/index?page=content&id=JSA10705
http://lists.opensuse.org/opensuse-security-announce/2011-05/msg00002.html
http://security.gentoo.org/glsa/glsa-201206-33.xml
http://securityreason.com/securityalert/8247
http://www.debian.org/security/2011/dsa-2233
http://www.kb.cert.org/vuls/id/727230
http://www.mail-archive.com/postfix-announce@postfix.org/msg00007.html
http://www.mandriva.com/security/advisories?name=MDVSA-2011:090
http://www.postfix.org/announcements/postfix-2.8.3.html
http://www.postfix.org/CVE-2011-1720.html
http://www.securityfocus.com/archive/1/517917/100/0/threaded
http://www.securityfocus.com/bid/47778
http://www.securitytracker.com/id?1025521
http://www.ubuntu.com/usn/usn-1131-1
https://bugzilla.redhat.com/show_bug.cgi?id=699035
https://exchange.xforce.ibmcloud.com/vulnerabilities/67359
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