Resource exhaustion in OpenBSD
CVE-2017-5850
httpd in OpenBSD allows remote attackers to cause a denial of service (memory consumption) via a series of requests for a large file using an HTTP Range header.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.172 (97.0th percentile), scored .
Moderate probability of exploitation in the next 30 days — watch for active exploitation reports. 97th percentile — 97.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.172 · newest: 0.172 · change: 0.000
Affected products
- OpenBSD — versions 6.0
Weakness classification (CWE)
Public proof-of-concept exploits
References
- www.openwall.com/lists/oss-security/2017/02/02/6 (mailing-list, Mailing List, Third Party Advisory)
- pierrekim.github.io/blog/2017-02-07-openbsd-httpd-CVE-2017-5850.html (Exploit, Patch, Third Party Advisory)
- www.securityfocus.com/bid/95997 (VDB Entry, Third Party Advisory, vdb-entry)
- github.com/openbsd/src/commit/142cfc82b932bc211218fbd7bdda8c7ce83f19df (Patch, Third Party Advisory)
- www.exploit-db.com/exploits/41278/ (Exploit, Patch, VDB Entry, Third Party Advisory, exploit)
- www.securitytracker.com/id/1037758 (VDB Entry, Third Party Advisory, vdb-entry)
- marc.info/ (mailing-list, Mailing List, Third Party Advisory)
- ftp.openbsd.org/pub/OpenBSD/patches/5.9/common/034_httpd.patch.sig (Patch, Vendor Advisory)
- ftp.openbsd.org/pub/OpenBSD/patches/6.0/common/017_httpd.patch.sig (Patch, Vendor Advisory)
- seclists.org/fulldisclosure/2017/Feb/15 (mailing-list, VDB Entry, Third Party Advisory)
Frequently asked questions
- What is CVE-2017-5850?
- CVE-2017-5850 is a high-severity vulnerability in OpenBSD, classified under Allocation of Resources Without Limits or Throttling. CVSS score: 7.5/10. Published 2017-03-27.
- How severe is CVE-2017-5850?
- High severity. CVSS v3 base score is 7.5 out of 10.
- Is CVE-2017-5850 known to be exploited?
- 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.