Server side object manipulation in Apache Struts

MEDIUM 5.0CVE-2010-1870 · GHSA-x5fc-pgpx-59j5 · Published 17/08/2010 · updated 16/06/2026

Package	Affected versions	Patched versions
org.apache.struts:struts2-core Maven	`< 2.2.1`	`2.2.1`
struts apache	`= 2.0.0= 2.0.1= 2.0.10= 2.0.11= 2.0.11.1= 2.0.11.2= 2.0.12= 2.0.13= 2.0.14= 2.0.2= 2.0.3= 2.0.4= 2.0.5= 2.0.6= 2.0.7= 2.0.8= 2.0.9= 2.1.0= 2.1.1= 2.1.2= 2.1.3= 2.1.4= 2.1.5= 2.1.6= 2.1.8= 2.1.8.1`	No fix yet

Description

OGNL provides, among other features, extensive expression evaluation capabilities. This vulnerability allows a malicious user to bypass the '#'-usage protection built into the ParametersInterceptor, thus being able to manipulate server side context objects. This behavior was already addressed in S2-003, but it turned out that the resulting fix based on whitelisting acceptable parameter names closed the vulnerability only partially.

NVD description

The OGNL extensive expression evaluation capability in XWork in Struts 2.0.0 through 2.1.8.1, as used in Atlassian Fisheye, Crucible, and possibly other products, uses a permissive whitelist, which allows remote attackers to modify server-side context objects and bypass the "#" protection mechanism in ParameterInterceptors via the (1) #context, (2) #_memberAccess, (3) #root, (4) #this, (5) #_typeResolver, (6) #_classResolver, (7) #_traceEvaluations, (8) #_lastEvaluation, (9) #_keepLastEvaluation, and possibly other OGNL context variables, a different vulnerability than CVE-2008-6504.

References

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