CVE-2017-9791

Apache Struts 1: Improper Input Validation

As of , CVE-2017-9791 in Apache Struts 1 is on CISA's list of exploited vulnerabilities: CISA listed it on . Our patch-first group: Patch this week.

Exploited
Yes: CISA listed it on 10 February 2022
US federal deadline
10 August 2022181 days after CISA listed it. US federal civilian agencies must fix it by then.
Used in ransomware campaigns
Not known to CISA
EPSS score
0.99Higher than 99% of the CVEs EPSS scores. EPSS estimates the chance of exploitation activity in the next 30 days.
EPSS when listed
0.95 on 10 February 2022EPSS on the day CISA listed it.
Public exploit
1 Metasploit module and 2 Exploit-DB entries (2 verified)
Fix
No vendor link in CISA's entry

What CISA says to do

Apply updates per vendor instructions.

CISA's required action

What the flaw is

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

CISA's 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.

The CVE record's description, from apache

CVE published
10 July 2017
Assigned by
apache
CVSS
9.8 Critical (CVSS 3.1, from CISA-ADP)
CWE-20
Improper Input Validation
CISA SSVC, exploitation
active
CISA SSVC, automatable
yes
CISA SSVC, technical impact
total

Timeline

  1. Exploit-DB published an exploit (EDB-ID 42324).
  2. The CVE record was published.
  3. Exploit-DB published an exploit (EDB-ID 44643).
  4. CISA added it to its list of exploited vulnerabilities.
  5. The US federal deadline to fix it.

Public exploits

Facts from Metasploit's module list and Exploit-DB's index; we never copy exploit code.

Struts 1: other exploited entries

VulnerabilityProductOur groupListedDeadlineEPSS
CVE-2006-1547ActionForm Denial-of-ServiceApache Struts 1Patch this weekEPSS 0.550.55

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