CVE-2024-25622

MEDIUM EPSS 34.3%
Published Oct 11, 20241y ago · Modified Jun 17, 20262w ago
4.3 CVSS 3.1
Medium
Find Similar
Published Oct 11, 2024 1y ago
Last Modified Jun 17, 2026 2w ago

Description

h2o is an HTTP server with support for HTTP/1.x, HTTP/2 and HTTP/3. The configuration directives provided by the headers handler allows users to modify the response headers being sent by h2o. The configuration file of h2o has scopes, and the inner scopes (e.g., path level) are expected to inherit the configuration defined in outer scopes (e.g., global level). However, if a header directive is used in the inner scope, all the definition in outer scopes are ignored. This can lead to headers not being modified as expected. Depending on the headers being added or removed unexpectedly, this behavior could lead to unexpected client behavior. This vulnerability is fixed in commit 123f5e2b65dcdba8f7ef659a00d24bd1249141be.

CVSS Details

Base Score
4.3
Exploitability
2.8
Impact
1.4
Vector string
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
Attack Vector Network
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality None
Integrity Low
Availability None

Threat Intelligence

EPSS Exploit Probability
34.3% percentile
Exploit & Patch Status
Public Exploit Known
Patch Available

Weaknesses 1

CWE-670

Affected Products 1

VendorProductVersionRange
denah2o* ≤2024-02-11

References 3

  • github.com https://github.com/h2o/h2o/commit/123f5e2b65dcdba8f7ef659a00d24bd1249141be
    Patch
  • github.com https://github.com/h2o/h2o/issues/3332
    Issue Tracking
  • github.com https://github.com/h2o/h2o/security/advisories/GHSA-5m7v-cj65-h6pj
    ExploitVendor Advisory

Remediation

  • github.com https://github.com/h2o/h2o/commit/123f5e2b65dcdba8f7ef659a00d24bd1249141be
    Patch