Multiple vulnerabilities in Apache SpamAssassin

Published: 2019-12-13

Risk	Medium
Patch available	YES
Number of vulnerabilities	2
CVE-ID	CVE-2019-12420 CVE-2018-11805
CWE-ID	CWE-20 CWE-78
Exploitation vector	Network
Public exploit	N/A
Vulnerable software Subscribe	SpamAssassin Server applications / DLP, anti-spam, sniffers
Vendor	Apache Foundation

Security Bulletin

This security bulletin contains information about 2 vulnerabilities.

1) Input validation error

EUVDB-ID: #VU23600

Risk: Medium

CVSSv3.1: 6.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2019-12420

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to insufficient validation of user-supplied input when parsing multipart email messages. A remote attacker can send a specially crafted email message and consume all available resources on the system.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

SpamAssassin: 3.4.0 - 3.4.2

External links

http://www.openwall.com/lists/oss-security/2019/12/12/2
http://bz.apache.org/SpamAssassin/show_bug.cgi?id=7747
http://lists.apache.org/thread.html/5863d6c42fc9595a29566732f12348cde0ca0e41bda91695c62041de@%3Cannounce.apache.org%3E
http://lists.apache.org/thread.html/5ef362d6da12126fafc81443309ca95d872d1bfd011fe4b2699f0fe9@%3Cusers.spamassassin.apache.org%3E
http://lists.apache.org/thread.html/64cf76749956dd08f7d5b86ec9f3321f382cfd7fe717ccd1be940c92@%3Cannounce.spamassassin.apache.org%3E
http://lists.apache.org/thread.html/e3c2367351286b77a74a082e2b66b793cceefa7b6ea9dcd162db4c4b@%3Cdev.spamassassin.apache.org%3E
http://svn.apache.org/repos/asf/spamassassin/branches/3.4/build/announcements/3.4.3.txt

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

2) OS Command Injection

EUVDB-ID: #VU23601

Risk: Low

CVSSv3.1: 6.8 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2018-11805

CWE-ID: CWE-78 - Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')