Postfix Cyrus SASL Authentication Context Data Reuse Memory Corruption

medium Nessus Plugin ID 54583
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The remote mail server is potentially affected by a memory corruption vulnerability.


According to its banner, the version of the Postfix mail server listening on this port is earlier than 2.5.13, 2.6.19, 2.7.4, or 2.8.3. Such versions may be vulnerable to a memory corruption attack if they have Cyrus SASL enabled and are allowing authentication methods other than ANONYMOUS, LOGIN, and PLAIN. Code execution as the unprivileged postfix user may also be possible.

Note that Nessus did not test whether the remote server was using Cyrus specifically, as opposed to another SASL library such as Dovecot.


Upgrade to Postfix 2.5.13 / 2.6.19 / 2.7.4 / 2.8.3 or later.

See Also

Plugin Details

Severity: Medium

ID: 54583

File Name: postfix_memory_corruption.nasl

Version: 1.7

Type: remote

Published: 5/19/2011

Updated: 11/15/2018

Dependencies: smtp_authentication.nasl

Configuration: Enable paranoid mode

Risk Information


Risk Factor: Medium

Score: 5.9


Risk Factor: Medium

Base Score: 6.8

Temporal Score: 5

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

Temporal Vector: CVSS2#E:U/RL:OF/RC:C

Vulnerability Information

CPE: cpe:2.3:a:postfix:postfix:*:*:*:*:*:*:*:*

Required KB Items: Settings/ParanoidReport, SMTP/postfix

Exploit Ease: No known exploits are available

Patch Publication Date: 5/9/2011

Vulnerability Publication Date: 5/9/2011

Reference Information

CVE: CVE-2011-1720

BID: 47778

CERT: 727230

Secunia: 44500