CVE-2016-0785: Apache Struts 2.x before 2.3.28 allows remote attackers to execute arbitrary code via a "%{}" sequence in a tag attribute, aka forced double OGNL evaluation.

PriorityP357high8.8CVSS 3.0

AVNACLPRLUINSUCHIHAH

EPSS

8.81%

94.6th percentile

Apache Struts 2.x before 2.3.28 allows remote attackers to execute arbitrary code via a "%{}" sequence in a tag attribute, aka forced double OGNL evaluation.

Affected

3 ranges

Vendor	Product	Version range	Fixed in
apache	struts	>= 2.0.0 < 2.3.29	2.3.29
apache	struts	>= 2.0.0 < 2.3.20.3	2.3.20.3
apache	struts	2.3.21 – 2.3.24.1	—

Detection & IOCsextracted from sources · hover to see the quote

→Detect forced double OGNL evaluation by looking for '%{}' sequences in HTTP request tag attribute values targeting Apache Struts 2.x endpoints ↗
→Monitor for double evaluation of attributes' values assigned to certain tags in Apache Struts — input containing OGNL expressions that get evaluated a second time during tag rendering is the attack pattern ↗
→Reference the vendor advisory S2-029 for payload patterns and affected tag list associated with this vulnerability ↗

·The fix for CVE-2016-0785 (patched in 2.3.28) was incomplete; CVE-2016-4461 covers the same attack vector and requires upgrading to Apache Struts 2.3.29 or later for full remediation ↗
·struts2-core JARs were bundled in source packages of Red Hat Fuse Service Works 6.0.0 and Single Sign On 7.3.0+ via a Google Guice import; customers who built artifacts from those source packages may have introduced vulnerable JARs into their environments ↗

CVSS provenance

nvdv3.08.8HIGHCVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

nvdv2.09.0CRITICALAV:N/AC:L/Au:S/C:C/I:C/A:C

ghsa8.8HIGH

osv8.8HIGH

vendor_redhat8.8HIGH

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