CVE-2022-37436CWE-113

Apache HTTP Server: mod_proxy prior to 2.4.55 allows a backend to trigger HTTP response splitting

Medium · published January 17, 2023

Patch now

High probability of exploitation

CVSS calls it medium at 5.3. It sits in the 99.0th percentile for exploit probability.

CVSS v3.1
5.3
EPSS
56%
Percentile
99.0
In the wild
Unconfirmed
What it is

Prior to Apache HTTP Server 2.4.55, a malicious backend can cause the response headers to be truncated early, resulting in some headers being incorporated into the response body. If the later headers have any security purpose, they will not be interpreted by the client.

The record
Technical detail
CVSS v3.1
5.3 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
CVSS v4.0
Not supplied
EPSS
0.55911 · 99.0th percentile
Weakness
CWE-113 · Improper Neutralization of CRLF Sequences in HTTP Headers ('HTTP Request/Response Splitting')
Published
2023-01-17T19:12Z
EPSS history
Timeline
  • 17 JAN 19:12Z
    Apache HTTP Server: mod_proxy prior to 2.4.55 allows a backend to trigger HTTP response splitting
    cvelistv5