CVE-2017-10872

H2O version 2.2.3 and earlier allows remote attackers to cause a denial of service in the server via unspecified vectors.

Published: 2017-12-22 Last update: 2026-05-13 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2017-10872 is rated Moderate Risk (49.9/100): CVSS Medium severity, with medium exploitation likelihood (EPSS 0.68%). Review affected assets and schedule remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2017-10872

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2025-03-30 0.94% 0.68% -0.26%
2 2025-03-29 0.68% 0.94% +0.26%
3 2025-03-17 — 0.68% —

Full EPSS history (6 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2017-10872

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
6.5 3.0 MEDIUM
CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:L)
A normal user session is enough; they don’t have to be admin.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:N)
Doesn’t really leak secrets in a meaningful way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 2.8 3.6 [email protected]
4.0 2.0 MEDIUM
AV:N/AC:L/Au:S/C:N/I:N/A:P Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:S)
A single authentication is required.
Confidentiality impact (C:N)
No confidentiality impact.
Integrity impact (I:N)
No integrity impact.
Availability impact (A:P)
Partial availability impact.
 8.0 2.9 [email protected]

Weakness enumeration for CVE-2017-10872

OS Trackers for CVE-2017-10872

vendor priority summary link
debian medium CVE-2017-10872 medium priority: Debian including 1 source packages (h2o), 2 status rows across 2 suites (bookworm, bullseye): resolved 2. https://security-tracker.debian.org/tracker/CVE-2017-10872
ubuntu medium CVE-2017-10872 medium priority: Ubuntu including 1 source packages (h2o), 7 status rows across 7 suites (artful, bionic, cosmic, trusty, upstream, xenial, zesty): DNE 4, not-affected 2, released 1. https://ubuntu.com/security/CVE-2017-10872

Affected software / configurations for CVE-2017-10872

Vendor Product Version Raw CPE
dena h2o <= 2.2.3 cpe:2.3:a:dena:h2o:*:*:*:*:*:*:*:*

References for CVE-2017-10872

URL Tags
https://github.com/h2o/h2o/issues/1543 Third Party Advisory
https://jvn.jp/en/jp/JVN84182676/index.html Third Party Advisory VDB Entry
cvelogic Threat Intelligence