Home/CVE/Apache Struts Deserialization of Untrusted Data Vulnerability
CVE

CVE-2017-9805

Apache Struts Deserialization of Untrusted Data Vulnerability

The REST Plugin in Apache Struts 2.1.1 through 2.3.x before 2.3.34 and 2.5.x before 2.5.13 uses an XStreamHandler with an instance of XStream for deserialization without any type filtering, which can lead to Remote Code Execution when deserializing XML payloads.

HIGH · CVSS 8.1 ⚠ CISA KEV EPSS 0.94322
Act now
  • Listed on CISA KEV (known exploited in the wild)
  • SSVC exploitation status: active
  • EPSS ≥ 0.50 - high probability of exploitation in the next 30 days
  • EPSS percentile: top 0% of all CVEs by exploitation likelihood
  • Public exploit or PoC is available
  • CVSS base score ≥ 7.0
Sigma rules10 YARA rules0
⬢

Required Remediation

Apply updates per vendor instructions.

◆

Threat Actors Linked

1
actorGALLIUM
⬡

Weakness Classification

CWE-502Deserialization of Untrusted Data
CWE-502Deserialization of Untrusted Data
▤

Affected Products & Versions

8
apache struts>= 2.1.2 and < 2.3.34
apache struts>= 2.5.0 and < 2.5.13
cisco digital media managerall versions
cisco hosted collaboration solutionall versions
cisco media experience engineall versions
cisco network performance analysisall versions
cisco video distribution suite for internet streamingall versions
netapp oncommand balanceall versions
▤

Affected Packages

1
Language-ecosystem packages (from OSV) tied to this CVE, with the version that fixes it - the dependency-level detail NVD doesn’t carry.
Maven org.apache.struts:struts2-rest-plugin HIGH fixed in 2.5.13
⚠

Public Exploits & PoCs

5
remoteApache Struts 2.5 < 2.5.12 - REST Plugin XStream Remote Code Execution2017-09-06
nucleiApache Struts2 S2-053 - Remote Code Executioncritical
nucleiApache Struts2 S2-052 - Remote Code Executionhigh
nucleiApache Struts2 S2-053 - Remote Code Executioncritical
pocwww.exploit-db.com · 42627www.exploit-db.com
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Detection Rules (IDS/IPS)

12
et-openET EXPLOIT Apache Struts 2 REST Plugin XStream RCE (ProcessBuilder)attempted-user
et-openET EXPLOIT Apache Struts 2 REST Plugin XStream RCE (Runtime.Exec)attempted-user
et-openET EXPLOIT Apache Struts 2 REST Plugin ysoserial Usage (B64) 1attempted-user
et-openET EXPLOIT Apache Struts 2 REST Plugin ysoserial Usage (B64) 2attempted-user
et-openET EXPLOIT Apache Struts 2 REST Plugin ysoserial Usage (B64) 3attempted-user
et-openET EXPLOIT Apache Struts 2 REST Plugin (B64) 4attempted-user
Open rulesets (ET Open, Snort Community, abuse.ch) link to source. Commercial rulesets are reference-only.
◈

Sigma Hunt Rules

10
Exact rules name this CVE ID. Product rules name an affected product in their title. Related rules cover techniques used by actors who exploited this CVE. Showing the most relevant matches; the complete related set is on the full drill-down.
relatedcriticalAntivirus Password Dumper Detection
relatedcriticalHacktool Execution - Imphash
relatedcriticalHackTool - Rubeus Execution
relatedcriticalPotential Credential Dumping Via LSASS Process Clone
relatedcriticalWCE wceaux.dll Access
relatedcriticalHackTool - Dumpert Process Dumper Default File
▣

Scoring & Timeline

8.1
HIGH · CVSS v3.1 · security@apache.org
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD15 Sep 2017 · 07:29 PM
CVSS VectorCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
SSVC triage · cisa-vulnrichment
Exploitation
active
Automatable
no
Technical impact
total
SSVC asks the questions that actually drive patch urgency: is it being exploited, can attacks be automated, and how total is the impact.
⚑

Vendor Advisories

3
cisaKEV-CVE-2017-9805
owasp-crsowasp-crs-rules-REQUEST-932-APPLICATION-ATTACK-RCE.conf
owasp-crsowasp-crs-rules-REQUEST-944-APPLICATION-ATTACK-JAVA.conf
🔗

References & Sources

12
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
http://www.oracle.com/technetwork/security-advisory/alert-cve-2017-9805-3889403.htmlPatchThird Party Advisory
http://www.securityfocus.com/bid/100609Broken LinkThird Party AdvisoryVDB Entry
http://www.securitytracker.com/id/1039263Broken LinkThird Party AdvisoryVDB Entry
https://blogs.apache.org/foundation/entry/apache-struts-statement-on-equifaxVendor Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1488482Issue TrackingThird Party AdvisoryVDB Entry
https://cwiki.apache.org/confluence/display/WW/S2-052MitigationVendor Advisory
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