PT-2011-3481 · Cyrus+1 · Cyrus Imap Server+1

Jan Lieskovsky · Published 2011-05-23 · Updated 2018-10-30 · CVE-2011-1926

Positive Technologies (AI Summary)

CVSS v2.0

5.1

Medium

Base vector

AV:N/AC:H/Au:N/C:P/I:P/A:P

Name of the Vulnerable Software and Affected Versions Cyrus IMAP Server versions prior to 2.4.7

Description The issue is related to a "plaintext command injection" attack, where man-in-the-middle attackers can insert commands into encrypted sessions. This occurs because the STARTTLS implementation does not properly restrict I/O buffering, allowing attackers to send a cleartext command that is processed after TLS is in place.

Recommendations For versions prior to 2.4.7, update to version 2.4.7 or later to resolve the issue. As a temporary workaround, consider restricting access to sensitive data and minimizing the use of cleartext commands in encrypted sessions until the update is applied.

Fix

Weakness Enumeration

CWE-264

Related Identifiers

CVE-2011-1926

DSA-2242-1

DSA-2258-1

RHSA-2011:0859

RHSA-2011_0859

Affected Products

Cyrus Imap Server

Red Hat

References · 24

• http://mandriva.com/security/advisories?name=MDVSA-2011:100 · Vendor Advisory
• http://redhat.com/support/errata/RHSA-2011-0859.html · Vendor Advisory
• http://bugzilla.cyrusimap.org/show_bug.cgi?id=3423 · Patch
• http://lists.fedoraproject.org/pipermail/package-announce/2011-June/061374.html · Vendor Advisory
• http://debian.org/security/2011/dsa-2242 · Vendor Advisory
• http://bugzilla.cyrusimap.org/show_bug.cgi?id=3424 · Patch
• http://lists.fedoraproject.org/pipermail/package-announce/2011-June/061415.html · Vendor Advisory
• https://linux.oracle.com/errata/ELSA-2011-0859.html · Vendor Advisory
• http://debian.org/security/2011/dsa-2258 · Vendor Advisory
• http://git.cyrusimap.org/cyrus-imapd/patch/?id=523a91a5e86c8b9a27a138f04a3e3f2d8786f162 · Patch
• https://nvd.nist.gov/vuln/detail/CVE-2011-1926 · Security Note
• http://openwall.com/lists/oss-security/2011/05/17/2 · Patch
• http://openwall.com/lists/oss-security/2011/05/17/15 · Patch
• https://bugzilla.redhat.com/show_bug.cgi?id=705288 · Patch
• http://securitytracker.com/id?1025625 · Note