CVE-2017-9805
Apache — Apache Struts Deserialization of Untrusted Data Vulnerability
Apache · CWE-502 — Deserialization of untrusted data · in CISA KEV since 2021-11-03
EVRS 85 of 100 Immediate
Patch Immediately
Rank 368 of 2,960 tracked
Why it scores 85
Evidence available: 6 of 7 signalsListed in the CISA KEV catalog, and an EPSS probability of 0.994.
- CISA KEVApplied
- RansomwareDid not apply
- Vendor exploitationDid not apply
- EPSSApplied
- Microsoft Exploitability IndexNot applicable
- Pre-patch disclosureNo data
- KEV recencyDid not apply
- CVSSApplied
The band answers “how soon”, not “how bad”. No data for: Pre-patch disclosure. Why some signals show no data
Fix
Patch or fixed version identifiedCISA required action
Fixed in
- org.apache.struts:struts2-rest-plugin
2.5.132.3.34update to this version or later in your release line
Affected versions
- org.apache.struts:struts2-rest-plugin (maven)
affected >= 2.5.0, < 2.5.13, fixed in 2.5.13affected >= 2.1.1, < 2.3.34, fixed in 2.3.34
Remediation
Apply updates per vendor instructions.
Fixed versions from NVD and GitHub. Affected packages also in GitHub Advisory GHSA-gg9m-fj3v-r58c (CC BY 4.0).
Evidence
Each value with its source| Measure | Value | Source |
|---|---|---|
| CVSS base scoreHow severe the flaw is in itself. It does not say how likely an attack is. | 8.1 | NVD |
| FIRST EPSSFIRST's estimate of the chance this is exploited in the next 30 days, and how that ranks against all CVEs. | 0.994 (99.94th pctl) | FIRST EPSS |
| Actively exploitedWhether a source of record has confirmed attacks using it in the wild. | Confirmed | CISA KEV |
| Ransomware campaign useWhether CISA has seen ransomware operators use it. | Unknown or none | CISA KEV |
| CISA remediation deadlineThe date US federal agencies must have fixed or mitigated it. | 2022-05-03 · KEV since 2021 · listed over a year | CISA KEV |
| Public exploit moduleA module existing is not the same as active exploitation. | Public module exists | Metasploit |
| EUVD cross-referenceENISA's record: CVSS 8.1 (v3.1), assigned by apache. | Listed | ENISA EUVD |
Description
NVDThe 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.
What CISA says to do
Public module
Metasploit lists a public excellent-rank module for this CVE: Apache Struts 2 REST Plugin XStream RCE (multi/http/struts2_rest_xstream). A module existing is not the same as active exploitation; see metasploit.com.