PT-2018-5980 · Apache+5 · Apache Spamassassin+5

Published 2018-09-17 · Updated 2024-06-15 · CVE-2017-15705

Positive Technologies (AI Summary)

CVSS v3.1

5.3

Medium

Base vector

AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

Name of the Vulnerable Software and Affected Versions: Apache SpamAssassin versions prior to 3.4.2

Description: A denial of service issue exists due to the incorrect handling of certain unclosed tags in emails, leading to scan timeouts. This occurs because the HTML::Parser module used by Apache SpamAssassin does not properly handle the "text" event for poorly formed HTML, causing the object to be handled abnormally. The issue is believed to be related to a bug or design decision in HTML::Parser. There have been instances of this issue being exploited in the wild, although it is not thought to have been intentionally used for denial of service attacks. However, there is concern that it may be abused in the future.

Recommendations: For versions prior to 3.4.2, update to version 3.4.2 or later to resolve the issue. As a temporary workaround, consider restricting the parsing of HTML emails to minimize the risk of exploitation.

Fix

DoS

RCE

Weakness Enumeration

CWE-20

Related Identifiers

ALT-PU-2018-2985

ALT-PU-2018-2986

CESA-2018_2916

CVE-2017-15705

DLA-1578-1

ELSA-2018-2916

MGASA-2018-0425

OPENSUSE-SU-2019:1831-1

OPENSUSE-SU-2019_1831-1

OPENSUSE-SU-2024:11395-1

RHSA-2018:2916

RHSA-2018_2916

SUSE-SU-2019:1961-1

SUSE-SU-2019:2011-1

SUSE-SU-2019_1961-1

USN-3811-1

USN-3811-2

Affected Products

Alt Linux

Apache Spamassassin

Centos

Red Hat

Suse

Ubuntu

References · 83

• https://ubuntu.com/security/CVE-2018-11780 · Vendor Advisory
• https://access.redhat.com/errata/RHSA-2018:2916 · Vendor Advisory
• https://bdu.fstec.ru/vul/2018-01532 · Security Note
• https://osv.dev/vulnerability/UBUNTU-CVE-2017-15705 · Vendor Advisory
• https://bdu.fstec.ru/vul/2022-02560 · Security Note
• http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-15705 · Security Note
• http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-11780 · Security Note
• https://errata.altlinux.org/ALT-PU-2018-2985 · Vendor Advisory
• https://osv.dev/vulnerability/DLA-1578-1 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2019:2011-1 · Vendor Advisory
• https://security.gentoo.org/glsa/201812-07 · Vendor Advisory
• https://security-tracker.debian.org/tracker/source-package/spamassassin · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2017-15705 · Security Note
• https://linux.oracle.com/errata/ELSA-2018-2916.html · Vendor Advisory
• https://ubuntu.com/security/CVE-2017-15705 · Vendor Advisory