UBUNTU-CVE-2025-57804
- Source
- https://ubuntu.com/security/CVE-2025-57804
- Import Source
- https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-57804.json
- JSON Data
- https://api.osv.dev/v1/vulns/UBUNTU-CVE-2025-57804
- Upstream
- Published
- 2025-08-25T21:15:00Z
- Modified
- 2025-08-27T18:40:25Z
- Severity
-
- 6.9 (Medium) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:N/SC:N/SI:L/SA:N CVSS Calculator
- Ubuntu - medium
- Summary
- [none]
- Details
-
h2 is a pure-Python implementation of a HTTP/2 protocol stack. Prior to version 4.3.0, an HTTP/2 request splitting vulnerability allows attackers to perform request smuggling attacks by injecting CRLF characters into headers. This occurs when servers downgrade HTTP/2 requests to HTTP/1.1 without properly validating header names/values, enabling attackers to manipulate request boundaries and bypass security controls. This issue has been patched in version 4.3.0.
- References
Affected packages
Ubuntu:Pro:18.04:LTS / python-h2
Package
- Name
- python-h2
- Purl
- pkg:deb/ubuntu/python-h2@3.0.1-3?arch=source&distro=esm-apps/bionic
Ubuntu:Pro:20.04:LTS / python-h2
Package
- Name
- python-h2
- Purl
- pkg:deb/ubuntu/python-h2@3.1.1-1?arch=source&distro=esm-apps/focal
Ubuntu:22.04:LTS / python-h2
Package
- Name
- python-h2
- Purl
- pkg:deb/ubuntu/python-h2@4.1.0-3ubuntu1?arch=source&distro=jammy
Ubuntu:24.04:LTS / python-h2
Package
- Name
- python-h2
- Purl
- pkg:deb/ubuntu/python-h2@4.1.0-4?arch=source&distro=noble