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RHEL 4 / 5 / 6 : cyrus-imapd (RHSA-2011:0859)

medium Nessus Plugin ID 55013

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Synopsis

The remote Red Hat host is missing one or more security updates.

Description

Updated cyrus-imapd packages that fix one security issue are now available for Red Hat Enterprise Linux 4, 5, and 6.

The Red Hat Security Response Team has rated this update as having moderate security impact. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available from the CVE link in the References section.

The cyrus-imapd packages contain a high-performance mail server with IMAP, POP3, NNTP, and Sieve support.

It was discovered that cyrus-imapd did not flush the received commands buffer after switching to TLS encryption for IMAP, LMTP, NNTP, and POP3 sessions. A man-in-the-middle attacker could use this flaw to inject protocol commands into a victim's TLS session initialization messages. This could lead to those commands being processed by cyrus-imapd, potentially allowing the attacker to steal the victim's mail or authentication credentials. (CVE-2011-1926)

Users of cyrus-imapd are advised to upgrade to these updated packages, which contain a backported patch to correct this issue. After installing the update, cyrus-imapd will be restarted automatically.

Solution

Update the affected packages.

See Also

https://access.redhat.com/security/cve/cve-2011-1926

https://access.redhat.com/errata/RHSA-2011:0859

Plugin Details

Severity: Medium

ID: 55013

File Name: redhat-RHSA-2011-0859.nasl

Version: 1.21

Type: local

Agent: unix

Published: 6/9/2011

Updated: 1/14/2021

Supported Sensors: Agentless Assessment, Frictionless Assessment Agent, Frictionless Assessment AWS, Frictionless Assessment Azure, Nessus Agent, Nessus

Risk Information

VPR

Risk Factor: High

Score: 7.3

CVSS v2

Risk Factor: Medium

Base Score: 6.8

Temporal Score: 5

Vector: CVSS2#AV:N/AC:M/Au:N/C:P/I:P/A:P

Vulnerability Information

CPE: p-cpe:/a:redhat:enterprise_linux:cyrus-imapd-devel, cpe:/o:redhat:enterprise_linux:5, cpe:/o:redhat:enterprise_linux:5.6, p-cpe:/a:redhat:enterprise_linux:cyrus-imapd, cpe:/o:redhat:enterprise_linux:6.1, p-cpe:/a:redhat:enterprise_linux:perl-cyrus, p-cpe:/a:redhat:enterprise_linux:cyrus-imapd-murder, cpe:/o:redhat:enterprise_linux:6, cpe:/o:redhat:enterprise_linux:4, p-cpe:/a:redhat:enterprise_linux:cyrus-imapd-debuginfo, cpe:/o:redhat:enterprise_linux:4.8, p-cpe:/a:redhat:enterprise_linux:cyrus-imapd-utils, p-cpe:/a:redhat:enterprise_linux:cyrus-imapd-nntp, p-cpe:/a:redhat:enterprise_linux:cyrus-imapd-perl

Required KB Items: Host/local_checks_enabled, Host/RedHat/release, Host/RedHat/rpm-list, Host/cpu

Exploit Ease: No known exploits are available

Patch Publication Date: 6/8/2011

Vulnerability Publication Date: 3/16/2011

Reference Information

CVE: CVE-2011-0411, CVE-2011-1926

BID: 46767

RHSA: 2011:0859