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
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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


CPE2.3 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')

Exploit availability: No

Description

The vulnerability allows a local user to execute arbitrary shell commands on the target system.

The vulnerability exists due to nefarious CF files can be configured to run system commands without any output. A local user can inject arbitrary commands into nefarious CF files and compromise the system or execute arbitrary code with elevated privileges.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

SpamAssassin: 3.4.0 - 3.4.2


CPE2.3 External links

http://www.openwall.com/lists/oss-security/2019/12/12/1
http://bz.apache.org/SpamAssassin/show_bug.cgi?id=7647
http://lists.apache.org/thread.html/2946b38caec47f7f6a79e8e03d2aa723794186e59a7dc6b5e76dfc18@%3Cannounce.spamassassin.apache.org%3E
http://lists.apache.org/thread.html/6f89f82a573ea616dce53ec67e52d963618a9f9ac71da5c1efdbd166@%3Cusers.spamassassin.apache.org%3E
http://lists.apache.org/thread.html/bc58907171c6585e5875a3ce86066d4956c218911cb74e3156de4433@%3Cannounce.apache.org%3E
http://lists.apache.org/thread.html/d015dc5b4f24fd6777a85d068502a9c5d58d69d877ed5b0eb9a22cd5@%3Cdev.spamassassin.apache.org%3E
http://seclists.org/oss-sec/2019/q4/154
http://svn.apache.org/repos/asf/spamassassin/branches/3.4/build/announcements/3.4.3.txt

Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

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



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