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CVE-2017-5850

38
FAUCET Score

CVE-2017-5850 describes a denial-of-service vulnerability in OpenBSD's httpd server, allowing remote attackers to exhaust memory by repeatedly requesting large files with HTTP Range headers. This high-severity vulnerability (CVSS 7.5) is easily exploitable over the network without user interaction, leading to a complete loss of availability. While not listed on the KEV catalog or Hot List, an ExploitDB entry exists, but there is no evidence of active exploitation or significant community discussion.

Impacted Technologies

VendorProductVersion(s)CPE
6.0CPE matchmatch criteria
cpe:2.3:o:openbsd:openbsd:6.0:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

7.5HIGH

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
3.6
CvssVersion
3.0

Exploit Intelligence

EPSS Score
17.20%
Probability of exploitation in next 30 days
EPSS Percentile
96.8%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
ExploitDB: EDB-41278 · Feb 7, 2017
This CVE's current EPSS score of 0.1720 is in the 95th percentile among its peer group of 51,506 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (1)

github_advisorypatch availablevia nvd_reference
View patch

References

marc.info
Mailing ListThird Party Advisory
packetstormsecurity.com / files/140944/OpenBSD-HTTP-Server-6.0-Denial-Of-Service.html
ExploitThird Party AdvisoryVDB Entry
seclists.org / fulldisclosure/2017/Feb/15
Third Party AdvisoryVDB Entry
ftp.openbsd.org / pub/OpenBSD/patches/5.9/common/034_httpd.patch.sig
PatchVendor Advisory
ftp.openbsd.org / pub/OpenBSD/patches/6.0/common/017_httpd.patch.sig
PatchVendor Advisory
github.com / openbsd/src/commit/142cfc82b932bc211218fbd7bdda8c7ce83f19df
PatchThird Party Advisory
pierrekim.github.io / blog/2017-02-07-openbsd-httpd-CVE-2017-5850.html
ExploitPatchThird Party Advisory
exploit-db.com / exploits/41278
ExploitPatchThird Party AdvisoryVDB Entry
openwall.com / lists/oss-security/2017/02/02/6
Mailing ListThird Party Advisory
securityfocus.com / bid/95997
Third Party AdvisoryVDB Entry
securitytracker.com / id/1037758
Third Party AdvisoryVDB Entry