Summary

• A vulnerability in Apache SpamAssassin could allow a local attacker to execute arbitrary code on a targeted system.

  The vulnerability is due to a code injection condition in the meta rule syntax that exists when rules are processed by the affected software. An attacker could exploit this vulnerability by supplying malicious data to a targeted system. A successful exploit could allow the attacker to execute arbitrary code.

  Apache has confirmed the vulnerability and released software updates.

Analysis

• To exploit this vulnerability, the attacker must have local access to the targeted system. This access requirement could reduce the likelihood of a successful exploit.

Safeguards

• Administrators are advised to apply the appropriate updates.

  Administrators are advised to allow only trusted users to access local systems.

  Administrators are advised to allow only privileged users to access administration or management systems.

  Administrators are advised to monitor critical systems.

Vendor Announcements

• Apache has released a security announcement at the following link: CVE-2018-11781

Fixed Software

• Apache has released software updates at the following link: SpamAssassin 3.4.2

Revision History

• Version	Description	Section	Date
  1	Initial public release.	—	2018-December-05

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Affected Products

• The security vulnerability applies to the following combinations of products.
  
  

  Primary Products
  SpamAssassin Dev Team	SpamAssassin	2.40 (Base) | 2.41 (Base) | 2.42 (Base) | 2.43 (Base) | 2.44 (Base) | 2.50 (Base) | 2.51 (Base) | 2.52 (Base) | 2.53 (Base) | 2.54 (Base) | 2.55 (Base) | 2.60 (Base) | 2.61 (Base) | 2.62 (Base) | 2.63 (Base) | 2.64 (Base) | 3.0.0 (Base) | 3.0.1 (Base) | 3.0.2 (Base) | 3.0.3 (Base) | 3.0.4 (Base) | 3.0.5 (Base) | 3.1 (Base) | 3.1.1 (Base) | 3.1.2 (Base) | 3.1.3 (Base) | 3.1.4 (Base) | 3.1.5 (Base) | 3.1.6 (Base) | 3.1.7 (Base) | 3.1.8 (Base) | 3.1.9 (Base) | 3.2 (.0, .1, .2, .3, .4, .5) | 3.3 (.0, .1, .2) | 3.4 (.0, .1)

  Associated Products