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Ubuntu Security Notice USN-4237-2
January 15, 2020

spamassassin vulnerabilities
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A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 14.04 ESM
- Ubuntu 12.04 ESM

Summary:

Several security issues were fixed in SpamAssassin.

Software Description:
- spamassassin: Perl-based spam filter using text analysis

Details:

USN-4237-1 fixed several vulnerabilities in SpamAssassin. This update provides
the corresponding update for Ubuntu 12.04 ESM and 14.04 ESM.

Original advisory details:

 It was discovered that SpamAssassin incorrectly handled certain CF files.
 If a user or automated system were tricked into using a specially-crafted
 CF file, a remote attacker could possibly run arbitrary code.
 (CVE-2018-11805)

 It was discovered that SpamAssassin incorrectly handled certain messages.
 A remote attacker could possibly use this issue to cause SpamAssassin to
 consume resources, resulting in a denial of service. (CVE-2019-12420)

Update instructions:

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 14.04 ESM:
  spamassassin                    3.4.2-0ubuntu0.14.04.1+esm1

Ubuntu 12.04 ESM:
  spamassassin                    3.4.2-0ubuntu0.12.04.3

In general, a standard system update will make all the necessary changes.

References:
  https://usn.ubuntu.com/4237-2
  https://usn.ubuntu.com/4237-1
  CVE-2018-11805, CVE-2019-12420