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CVE-2011-1720

6.8 · MEDIUM

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 h…

Published May 13, 2011postfixCWE-119EPSS 21.48%

Overview

CVE-2011-1720 is a medium-severity vulnerability affecting postfix postfix. It was published on May 13, 2011 and has a CVSS 2.0 base score of 6.8 (MEDIUM).

This vulnerability has a CVSS 2.0 base score of 6.8, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical 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.

Remediation

Check the references section for vendor advisories and patches from postfix. Update postfix to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

Affected products

VendorProductVersionsStatus

References

Refkb.juniper.net/InfoCenter/index?page=content&id=JSA10705Reflists.opensuse.org/opensuse-security-announce/2011-05/msg00002.htmlRefsecunia.com/advisories/44500Refsecurity.gentoo.org/glsa/glsa-201206-33.xmlRefsecurityreason.com/securityalert/8247Refwww.debian.org/security/2011/dsa-2233Refwww.kb.cert.org/vuls/id/727230Refwww.mail-archive.com/postfix-announce%40postfix.org/msg00007.htmlRefwww.mandriva.com/security/advisories?name=MDVSA-2011:090Refwww.osvdb.org/72259

How CyberStrike helps

Frequently asked questions

What is CVE-2011-1720?

CVE-2011-1720 is a medium-severity vulnerability affecting postfix postfix. It was published on May 13, 2011 and has a CVSS 2.0 base score of 6.8 (MEDIUM).

How severe is CVE-2011-1720?

This vulnerability has a CVSS 2.0 base score of 6.8, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2011-1720?

Check the references section for vendor advisories and patches from postfix. Update postfix to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2011-1720?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2011-1720 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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