CVE-2011-1720 Memory corruption in n/a

Medium 6.8 Published 13 May 2011 Updated 6 Aug 2024

Remote attackers can cause denial of service or execute arbitrary code via heap memory corruption in Postfix when specific SASL authentication methods are enabled.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Over the internet
Victim action needed: Not needed
Fix: Available

What is CVE-2011-1720?

CVE-2011-1720 is a medium-severity memory corruption vulnerability in n/a, published on 13 May 2011. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official 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.

Weakness: CWE-119

Which versions are affected by CVE-2011-1720?

It affects 1 product.

Linux distribution packages (18)

`postfix` Red Hat:enterprise_linux:4::as	All versions	`2:2.2.10-1.5.el4`
`postfix-debuginfo` Red Hat:enterprise_linux:4::as	All versions	`2:2.2.10-1.5.el4`
`postfix-pflogsumm` Red Hat:enterprise_linux:4::as	All versions	`2:2.2.10-1.5.el4`
`postfix` Red Hat:enterprise_linux:4::desktop	All versions	`2:2.2.10-1.5.el4`
`postfix-debuginfo` Red Hat:enterprise_linux:4::desktop	All versions	`2:2.2.10-1.5.el4`
`postfix-pflogsumm` Red Hat:enterprise_linux:4::desktop	All versions	`2:2.2.10-1.5.el4`
`postfix` Red Hat:enterprise_linux:4::es	All versions	`2:2.2.10-1.5.el4`
`postfix-debuginfo` Red Hat:enterprise_linux:4::es	All versions	`2:2.2.10-1.5.el4`
`postfix-pflogsumm` Red Hat:enterprise_linux:4::es	All versions	`2:2.2.10-1.5.el4`
`postfix` Red Hat:enterprise_linux:4::ws	All versions	`2:2.2.10-1.5.el4`
`postfix-debuginfo` Red Hat:enterprise_linux:4::ws	All versions	`2:2.2.10-1.5.el4`
`postfix-pflogsumm` Red Hat:enterprise_linux:4::ws	All versions	`2:2.2.10-1.5.el4`
`postfix` Red Hat:enterprise_linux:5::server	All versions	`2:2.3.3-2.3.el5_6`
`postfix-debuginfo` Red Hat:enterprise_linux:5::server	All versions	`2:2.3.3-2.3.el5_6`
`postfix-pflogsumm` Red Hat:enterprise_linux:5::server	All versions	`2:2.3.3-2.3.el5_6`
`postfix` Red Hat:enterprise_linux:6::server	All versions	`2:2.6.6-2.2.el6_1`
`postfix-debuginfo` Red Hat:enterprise_linux:6::server	All versions	`2:2.6.6-2.2.el6_1`
`postfix-perl-scripts` Red Hat:enterprise_linux:6::server	All versions	`2:2.6.6-2.2.el6_1`

Products include Postfix Postfix.

How do I fix CVE-2011-1720?

Upgrade to a fixed version.

Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.

Is CVE-2011-1720 being exploited?

There is no known exploitation of CVE-2011-1720 in the wild and no public exploit code.

Sources

Also known as DEBIAN-CVE-2011-1720, GHSA-8j5r-6hhw-hf9g, RHSA-2011:0843.