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Debian Security Advisory DSA 3828-1 (dovecot - security update)

Information

Severity

Severity

Medium

Family

Family

Debian Local Security Checks

CVSSv2 Base

CVSSv2 Base

5.0

CVSSv2 Vector

CVSSv2 Vector

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

Solution Type

Solution Type

Vendor Patch

Created

Created

5 years ago

Modified

Modified

10 months ago

Summary

It was discovered that the Dovecot email server is vulnerable to a denial of service attack. When the dict passdb and userdb are used for user authentication, the username sent by the IMAP/POP3 client is sent through var_expand() to perform %variable expansion. Sending specially crafted %variable fields could result in excessive memory usage causing the process to crash (and restart).

Affected Software

Affected Software

dovecot on Debian Linux

Detection Method

Detection Method

This check tests the installed software version using the apt package manager.

Solution

Solution

For the stable distribution (jessie), this problem has been fixed in version 1:2.2.13-12~deb8u2. We recommend that you upgrade your dovecot packages.

Common Vulnerabilities and Exposures (CVE)