CVE-2023-29197
moderate-risk
Published 2023-04-17
guzzlehttp/psr7 is a PSR-7 HTTP message library implementation in PHP. Affected versions are subject to improper header parsing. An attacker could sneak in a newline (\n) into both the header names and values. While the specification states that \r\n\r\n is used to terminate the header list, many servers in the wild will also accept \n\n. This is a follow-up to CVE-2022-24775 where the fix was incomplete. The issue has been patched in versions 1.9.1 and 2.4.5. There are no known workarounds for this vulnerability. Users are advised to upgrade.
Do I need to act?
~
2.3% chance of exploitation in next 30 days
EPSS score — moderate exploit probability
-
Not on CISA KEV list
No confirmed active exploitation reported to CISA
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
5
CVSS 5.3/10
Medium
NETWORK
/ LOW complexity
Affected Vendors
References (14)
Not Applicable
https://cve.mitre.org/cgi-bin/cvename.cgi?name=2022-24775
Technical Description
https://www.rfc-editor.org/rfc/rfc7230#section-3.2.4
Not Applicable
https://cve.mitre.org/cgi-bin/cvename.cgi?name=2022-24775
Technical Description
https://www.rfc-editor.org/rfc/rfc7230#section-3.2.4
35
/ 100
moderate-risk
Severity
21/34 · High
Exploitability
5/34 · Minimal
Exposure
9/34 · Low