CVE-2017-9791

Apache Struts 1 Improper Input Validation

9.8 CRITICALActively exploited (CISA KEV)EPSS 98.9%

Published10 Jul 2017
Added to CISA KEV10 Feb 2022
Remediation due10 Aug 2022

Description

The Struts 1 plugin in Apache Struts 2.1.x and 2.3.x might allow remote code execution via a malicious field value passed in a raw message to the ActionMessage.

CVSS 3.1 breakdown

Attack vectorNetwork

Attack complexityLow

Privileges requiredNone

User interactionNone

ScopeUnchanged

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

Apache Struts2.3.1 · 2.3.1.1 · 2.3.1.2 · 2.3.12

Remediation

No fixed version is recorded in the NVD data. Check the vendor advisory for the latest guidance.

Patch & vendor advisories

References

https://security.netapp.com/advisory/ntap-20180706-0002/Third Party Advisory
http://struts.apache.org/docs/s2-048.htmlMitigationVendor Advisory
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2017-9791US Government Resource
https://www.exploit-db.com/exploits/42324/Third Party AdvisoryVDB Entry
https://www.exploit-db.com/exploits/44643/Third Party AdvisoryVDB Entry
http://www.oracle.com/technetwork/security-advisory/alert-cve-2017-9805-3889403.htmlPatchThird Party Advisory
http://www.securityfocus.com/bid/99484Third Party AdvisoryVDB EntryBroken Link
http://www.securitytracker.com/id/1038838Third Party AdvisoryVDB EntryBroken Link

Related CVEs

Recent high-severity vulnerabilities sharing a weakness type.

Frequently asked

Is CVE-2017-9791 being actively exploited?

Yes. CVE-2017-9791 is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, added 10 Feb 2022.

How severe is CVE-2017-9791?

CVE-2017-9791 has a CVSS 3.1 base score of 9.8, rated critical. EPSS estimates a 98.9% probability of exploitation.

Which products are affected by CVE-2017-9791?

Affected products include Apache Struts.

How do I fix CVE-2017-9791?

Apply the vendor's patch or advisory guidance, then verify no affected versions remain across your devices.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2017-9791 against the real software inventory on every managed device, every day. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. Because it is on the CISA KEV list, Secuno flags any affected asset as top-priority automatically. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.