GLSA-200606-19 : Sendmail: Denial of Service

medium Nessus Plugin ID 21712

Synopsis

The remote Gentoo host is missing one or more security-related patches.

Description

The remote host is affected by the vulnerability described in GLSA-200606-19 (Sendmail: Denial of Service)

Frank Sheiness discovered that the mime8to7() function can recurse endlessly during the decoding of multipart MIME messages until the stack of the process is filled and the process crashes.
Impact :

By sending specially crafted multipart MIME messages, a remote attacker can cause a subprocess forked by Sendmail to crash. If Sendmail is not set to use a randomized queue processing, the attack will effectively halt the delivery of queued mails as well as the malformed one, incoming mail delivered interactively is not affected.
Additionally, on systems where core dumps with an individual naming scheme (like 'core.pid') are enabled, a filesystem may fill up with core dumps. Core dumps are disabled by default in Gentoo.
Workaround :

The Sendmail 8.13.7 release information offers some workarounds, please see the Reference below. Note that the issue has actually been fixed in the 8.13.6-r1 ebuild.

Solution

All Sendmail users should upgrade to the latest version:
# emerge --sync # emerge --ask --oneshot --verbose '>=mail-mta/sendmail-8.13.6-r1'

Plugin Details

Severity: Medium

ID: 21712

File Name: gentoo_GLSA-200606-19.nasl

Version: 1.12

Type: local

Family: Gentoo Local Security Checks

Published: 6/16/2006

Updated: 1/6/2021

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Low

Score: 3.4

CVSS v2

Risk Factor: Medium

Base Score: 5

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

Vulnerability Information

CPE: p-cpe:/a:gentoo:linux:sendmail, cpe:/o:gentoo:linux

Required KB Items: Host/local_checks_enabled, Host/Gentoo/release, Host/Gentoo/qpkg-list

Patch Publication Date: 6/15/2006

Reference Information

CVE: CVE-2006-1173

GLSA: 200606-19

Detections

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