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Exploited vulnerability · CISA KEV

Is CVE-2017-8291 exploited? Yes: in CISA KEV since 24 May 2022

Gociux · Artifex Ghostscript · data: CISA KEV, CVE record, FIRST EPSS

Yes. CVE-2017-8291, Artifex Ghostscript Type Confusion Vulnerability, is being exploited in the wild. CISA added it to its Known Exploited Vulnerabilities catalog on 24 May 2022, 1853 days after it was published. It affects Artifex Ghostscript. If you run it, CISA's required action is: Apply updates per vendor instructions.

exploitedYesCISA KEV · 24 May 2022
ransomwareNot knownno confirmed use
EPSStop 1%among the most likely CVEs to be exploited
severity7.8CVSS 3.1 · high
US federal due14 Jun 2022BOD 22-01 deadline

What it is

Artifex Ghostscript allows -dSAFER bypass and remote command execution via .rsdparams type confusion with a "/OutputFile.

VendorArtifex (1 exploited CVE in KEV)
ProductGhostscript
VulnerabilityArtifex Ghostscript Type Confusion Vulnerability
WeaknessCWE-704
Published27 Apr 2017
Added to KEV24 May 2022
Reported by (CNA)mitre

What to do

  1. Check whether you run it. Look for Ghostscript in your asset inventory, including appliances and cloud images. Stack check lists every exploited Artifex CVE at once.
  2. Apply the fix. Apply updates per vendor instructions.
  3. If you can't patch today, take the affected service off the internet or restrict who can reach it, and check its logs for signs of compromise since 27 Apr 2017.
  4. Get told next time. Email alerts when CISA adds a CVE for Artifex.

References

Questions

Is CVE-2017-8291 being exploited?

Yes. CISA added CVE-2017-8291 to the Known Exploited Vulnerabilities catalog on 24 May 2022, which means there is reliable evidence of exploitation in the wild.

Is CVE-2017-8291 used in ransomware attacks?

CISA does not list known ransomware use for it. That can change, and exploitation alone is reason to fix it first.

How do I fix CVE-2017-8291?

Apply updates per vendor instructions. Check Artifex's advisory for the fixed versions, and if you can't patch quickly, restrict access to the affected Ghostscript and watch it for signs of compromise.

Sources: CISA KEV (exploitation, ransomware use, required action, due date), the CVE record (publication date, CVSS, CNA), NVD and FIRST EPSS (live score). More: all KEV additions in May 2022 · act-now radar.

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