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Exploited vulnerability · CISA KEV

Is CVE-2013-2551 exploited? Yes: in CISA KEV since 28 Mar 2022

Gociux · Microsoft Internet Explorer · data: CISA KEV, CVE record, FIRST EPSS

Yes. CVE-2013-2551, Microsoft Internet Explorer Use-After-Free Vulnerability, is being exploited in the wild. CISA added it to its Known Exploited Vulnerabilities catalog on 28 Mar 2022, 3304 days after it was published. It is known to be used in ransomware campaigns. It affects Microsoft Internet Explorer. If you run it, CISA's required action is: Apply updates per vendor instructions.

exploitedYesCISA KEV · 28 Mar 2022
ransomwareKnownused in campaigns
EPSStop 1%among the most likely CVEs to be exploited
severity8.8CVSS 3.1 · high
US federal due18 Apr 2022BOD 22-01 deadline

What it is

Use-after-free vulnerability in Microsoft Internet Explorer allows remote attackers to execute remote code via a crafted web site that triggers access to a deleted object.

VendorMicrosoft (391 exploited CVEs in KEV)
ProductInternet Explorer
VulnerabilityMicrosoft Internet Explorer Use-After-Free Vulnerability
WeaknessCWE-416
Published11 Mar 2013
Added to KEV28 Mar 2022
Reported by (CNA)mitre

What to do

  1. Check whether you run it. Look for Internet Explorer in your asset inventory, including appliances and cloud images. Stack check lists every exploited Microsoft 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 11 Mar 2013.
  4. Get told next time. Email alerts when CISA adds a CVE for Microsoft.

Other exploited CVEs in Internet Explorer

References

Questions

Is CVE-2013-2551 being exploited?

Yes. CISA added CVE-2013-2551 to the Known Exploited Vulnerabilities catalog on 28 Mar 2022, which means there is reliable evidence of exploitation in the wild.

Is CVE-2013-2551 used in ransomware attacks?

Yes, CISA lists it as known to be used in ransomware campaigns.

How do I fix CVE-2013-2551?

Apply updates per vendor instructions. Check Microsoft's advisory for the fixed versions, and if you can't patch quickly, restrict access to the affected Internet Explorer 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 March 2022 · Microsoft scorecard · act-now radar.

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