Exploited vulnerability · CISA KEV

Is CVE-2017-7269 exploited? Yes: in CISA KEV since 3 Nov 2021

Q: Is CVE-2017-7269 being exploited?

Yes. CISA added CVE-2017-7269 to the Known Exploited Vulnerabilities catalog on 3 Nov 2021, which means there is reliable evidence of exploitation in the wild.

Q: Is CVE-2017-7269 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.

Q: How do I fix CVE-2017-7269?

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 Information Services (IIS) and watch it for signs of compromise.

Gociux · Microsoft Internet Information Services (IIS) · data: CISA KEV, CVE record, FIRST EPSS

Yes. CVE-2017-7269, Microsoft Windows Server Buffer Overflow Vulnerability, is being exploited in the wild. CISA added it to its Known Exploited Vulnerabilities catalog on 3 Nov 2021, 1682 days after it was published. It affects Microsoft Internet Information Services (IIS). If you run it, CISA's required action is: Apply updates per vendor instructions.

exploitedYesCISA KEV · 3 Nov 2021

ransomwareNot knownno confirmed use

EPSStop 1%among the most likely CVEs to be exploited

severity9.8CVSS 3.1 · critical

US federal due3 May 2022BOD 22-01 deadline

What it is

Microsoft Windows Server 2003 R2 contains a buffer overflow vulnerability in Internet Information Services (IIS) 6.0 which allows remote attackers to execute code via a long header beginning with "If: <http://" in a PROPFIND request.

Vendor	Microsoft (391 exploited CVEs in KEV)
Product	Internet Information Services (IIS)
Vulnerability	Microsoft Windows Server Buffer Overflow Vulnerability
Weakness	CWE-119
Published	27 Mar 2017
Added to KEV	3 Nov 2021
Reported by (CNA)	mitre

What to do

Check whether you run it. Look for Internet Information Services (IIS) in your asset inventory, including appliances and cloud images. Stack check lists every exploited Microsoft CVE at once.
Apply the fix. Apply updates per vendor instructions.
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 Mar 2017.
Get told next time. Email alerts when CISA adds a CVE for Microsoft.

References

nvd.nist.gov/vuln/detail/CVE-2017-7269

Questions

Is CVE-2017-7269 being exploited?

Yes. CISA added CVE-2017-7269 to the Known Exploited Vulnerabilities catalog on 3 Nov 2021, which means there is reliable evidence of exploitation in the wild.

Is CVE-2017-7269 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-2017-7269?

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 Information Services (IIS) 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 November 2021 · Microsoft scorecard · act-now radar.

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