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Summary

Excerpt

Possible Remote Code Execution when alwaysSelectFullNamespace is true (either by user or a plugin like Convention Plugin) and then: results are used with no namespace and in same time, its upper package have no or wildcard namespace and similar to results, same possibility when using url tag which doesn’t have value and action set and in same time, its upper package have no or wildcard namespacePrevious Security Bulletins contained incorrect affected release version ranges.


Who should read this

All Struts 2 developers and users

Impact of vulnerability

Possible Remote Code Execution when alwaysSelectFullNamespace is true (either by user or a plugin like Convention Plugin) and then: results are used with no namespace and in same time, its upper package have no or wildcard namespace and similar to results, same possibility when using url tag which doesn’t have value and action set and in same time, its upper package have no or wildcard namespace.

Maximum security rating

Medium

Recommendation

Upgrade to Struts 2.3.35 or Struts 2.5.17

Affected Software

Struts 2.0.4 - Struts 2.3.34, Struts 2.5.0 - Struts 2.5.16

Reporter

Man Yue Mo from the Semmle Security Research team

CVE Identifier

CVE-2018-11776

Problem

It is possible to perform a RCE attack when alwaysSelectFullNamespace is true (either by user or a plugin like Convention Plugin) and then: namespace value isn't set for a result defined in underlying configurations and in same time, its upper package configuration have no or wildcard namespace and same possibility when using url tag which doesn’t have value and action set and in same time, its upper package configuration have no or wildcard namespaceStruts Security Bulletins contain a listing of affected release versions for given issues, along with a recommended minimum release version to fix this particular issue. Thorough investigations conducted by the reporting entity revealed that in many cases more Struts releases were affected than originally reported and that higher minimum fix versions are required.

Solution

Upgrade to Apache Struts version 2.3.35 or 2.5.17.

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Security BulletinPreviously announced Affected VersionsReleasesUpdated Affected VersionsReleasesMinimum Fix VersionsCVE Identifier
S2-0022.0.0 - 2.0.11

2.0.0 - 2.1.8.1

2.2.1
S2-0032.0.0 - 2.0.11.22.0.0 - 2.1.8.12.2.1

CVE-2008-6504

S2-0042.0.0 - 2.0.11.2

2.0.0 - 2.0.11.2

2.1.0 - 2.1.2

2.0.12

2.1.6

CVE-2008-6505

S2-0082.1.0 - 2.3.1

2.0.0 - 2.2.3

2.0.0 - 2.3.17

2.2.3.1

2.3.18

CVE-2012-0391

CVE-2012-0394

S2-012Struts Showcase App 2.0.0 - 2.3.132.0.0 - 2.3.14.22.3.14.3

CVE-2013-1965

S2-013

2.0.0 - 2.3.13

2.0.0 - 2.3.14.1

2.3.14.2

CVE-2013-1966

S2-020

2.0.0 - 2.3.16

2.0.0 - 2.3.16.12.3.16.2

CVE-2014-0094

S2-0212.0.0 - 2.3.16.1

2.0.0 - 2.3.16.3

2.3.20

CVE-2014-0112

CVE-2014-0113

S2-0222.0.0 - 2.3.16.12.0.0 - 2.3.16.32.3.20

CVE-2014-0116

Both 2.3.35 and 2.5.17 versions contain the security fixes only, nothing more. No backward incompatibility issues are expected.

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