RHSA-2011:0843: Moderate: postfix security update
Postfix is a Mail Transport Agent (MTA), supporting LDAP, SMTP AUTH (SASL),and TLS.A heap-based buffer over-read flaw was found in the way Postfix performedSASL handlers management for SMTP sessions, when Cyrus SASL authenticationwas enabled. A remote attacker could use this flaw to cause the Postfixsmtpd server to crash via a specially-crafted SASL authentication request.The smtpd process was automatically restarted by the postfix master processafter the time configured with servicethrottletime elapsed.(CVE-2011-1720)Note: Cyrus SASL authentication for Postfix is not enabled by default.Red Hat would like to thank the CERT/CC for reporting this issue. Upstreamacknowledges Thomas Jarosch of Intra2net AG as the original reporter.Users of Postfix are advised to upgrade to these updated packages, whichcontain a backported patch to resolve this issue. After installing thisupdate, the postfix service will be restarted automatically.
Affected Software
Remediation
Event History
Frequently Asked Questions
What is the severity of RHSA-2011:0843?
The severity of RHSA-2011:0843 is classified as moderate.
How do I fix RHSA-2011:0843?
To fix RHSA-2011:0843, upgrade Postfix and its related packages to version 2.6.6-2.2.el6_1 or the specified remedial versions.
Which versions of Postfix are affected by RHSA-2011:0843?
The affected versions of Postfix in RHSA-2011:0843 include 2.6.6 and 2.3.3 and earlier versions.
What type of vulnerability is cited in RHSA-2011:0843?
RHSA-2011:0843 describes a heap-based buffer over-read flaw in Postfix when using Cyrus SASL authentication.
Can RHSA-2011:0843 be exploited remotely?
Yes, a remote attacker could potentially exploit the vulnerability outlined in RHSA-2011:0843 if SASL authentication is enabled.