Buffer overflow in Microsoft Internet Information Services
CVE-2017-7269
Buffer overflow in the ScStoragePathFromUrl function in the WebDAV service in Internet Information Services (IIS) 6.0 in Microsoft Windows Server 2003 R2 allows remote attackers to execute arbitrary code via a long header beginning with "If: <http://" in a PROPFIND request, as exploited in the wild in July or August 2016.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.998 (100.0th percentile), scored .
Very high probability of exploitation in the next 30 days — among the top 0.1% most-likely-to-be-exploited CVEs. 100th percentile — 100.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.998 · newest: 0.998 · change: 0.000
Affected products
- Microsoft Internet Information Services — versions 6.0
- Microsoft Windows Server 2003 — versions r2
Weakness classification (CWE)
CISA KEV (Known Exploited Vulnerabilities)
This CVE is on the CISA KEV catalog, added on . CISA KEV inclusion means CISA has confirmed in-the-wild exploitation; US federal agencies are required to remediate within a published due date.
BOD 22-01 due date: .
Required action: Apply updates per vendor instructions.
Public proof-of-concept exploits
References
- www.exploit-db.com/exploits/41992/ (Exploit, VDB Entry, Third Party Advisory, exploit)
- www.securityfocus.com/bid/97127 (VDB Entry, Third Party Advisory, vdb-entry, Broken Link)
- medium.com/@iraklis/number-of-internet-facing-vulnerable-iis-6-0-to-cve-2017-72… (Exploit)
- github.com/rapid7/metasploit-framework/pull/8162 (Patch, Issue Tracking)
- github.com/danigargu/explodingcan (Exploit)
- www.securitytracker.com/id/1038168 (VDB Entry, Third Party Advisory, vdb-entry, Broken Link)
- www.exploit-db.com/exploits/41738/ (Exploit, VDB Entry, Third Party Advisory, exploit)
- support.microsoft.com/en-us/help/3197835/description-of-the-security-update-for… (Patch, Broken Link, Vendor Advisory)
- 0patch.blogspot.com/2017/03/0patching-immortal-cve-2017-7269.html (Exploit, Third Party Advisory)
- github.com/edwardz246003/IIS_exploit (Third Party Advisory, Broken Link)
Frequently asked questions
- What is CVE-2017-7269?
- CVE-2017-7269 is a critical-severity vulnerability in Microsoft Internet Information Services, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 9.8/10. Published 2017-03-27.
- How severe is CVE-2017-7269?
- Critical severity. CVSS v3 base score is 9.8 out of 10.
- Is CVE-2017-7269 known to be exploited?
- Yes. CVE-2017-7269 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2021-11-03), indicating it is being actively exploited. 134 public proof-of-concept repositories are indexed.