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Exploited vulnerability · CISA KEV

Is CVE-2017-0022 exploited? Yes: in CISA KEV since 24 May 2022

Gociux · Microsoft XML Core Services · data: CISA KEV, CVE record, FIRST EPSS

Yes. CVE-2017-0022, Microsoft XML Core Services Information Disclosure Vulnerability, is being exploited in the wild. CISA added it to its Known Exploited Vulnerabilities catalog on 24 May 2022, 1894 days after it was published. It affects Microsoft XML Core Services. If you run it, CISA's required action is: Apply updates per vendor instructions.

exploitedYesCISA KEV · 24 May 2022
ransomwareNot knownno confirmed use
EPSStop 5%very likely to be exploited
severity6.5CVSS 3.1 · medium
US federal due14 Jun 2022BOD 22-01 deadline

What it is

Microsoft XML Core Services (MSXML) improperly handles objects in memory, allowing attackers to test for files on disk via a crafted web site.

VendorMicrosoft (391 exploited CVEs in KEV)
ProductXML Core Services
VulnerabilityMicrosoft XML Core Services Information Disclosure Vulnerability
WeaknessCWE-200
Published17 Mar 2017
Added to KEV24 May 2022
Reported by (CNA)microsoft

What to do

  1. Check whether you run it. Look for XML Core Services 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 17 Mar 2017.
  4. Get told next time. Email alerts when CISA adds a CVE for Microsoft.

Other exploited CVEs in XML Core Services

References

Questions

Is CVE-2017-0022 being exploited?

Yes. CISA added CVE-2017-0022 to the Known Exploited Vulnerabilities catalog on 24 May 2022, which means there is reliable evidence of exploitation in the wild.

Is CVE-2017-0022 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-2017-0022?

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 XML Core Services 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 · Microsoft scorecard · act-now radar.

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