// For flags

CVE-2023-29197

Improper header name validation in guzzlehttp/psr7

Severity Score

7.5
*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

0
*Multiple Sources

Exploited in Wild

-
*KEV

Decision

-
*SSVC
Descriptions

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 (
) into both the header names and values. While the specification states that \r
\r
is used to terminate the header list, many servers in the wild will also accept

. 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.

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 (
) into both the header names and values. While the specification states that \r
\r
is used to terminate the header list, many servers in the wild will also accept

. 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.

While some WordPress plugins and themes may be using this library, it does not make them vulnerable to exploitation.

*Credits: N/A
CVSS Scores
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
High
Availability
None
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
Low
Availability
None
* Common Vulnerability Scoring System
SSVC
  • Decision:-
Exploitation
-
Automatable
-
Tech. Impact
-
* Organization's Worst-case Scenario
Timeline
  • 2023-04-03 CVE Reserved
  • 2023-04-17 CVE Published
  • 2024-05-19 EPSS Updated
  • 2024-08-02 CVE Updated
  • ---------- Exploited in Wild
  • ---------- KEV Due Date
  • ---------- First Exploit
CWE
  • CWE-436: Interpretation Conflict
CAPEC
Affected Vendors, Products, and Versions
Vendor Product Version Other Status
Vendor Product Version Other Status <-- --> Vendor Product Version Other Status
Guzzlephp
Search vendor "Guzzlephp"
 Psr-7
Search vendor "Guzzlephp" for product "Psr-7"
 < 1.9.1
Search vendor "Guzzlephp" for product "Psr-7" and version " < 1.9.1"
-
Affected
Guzzlephp
Search vendor "Guzzlephp"
 Psr-7
Search vendor "Guzzlephp" for product "Psr-7"
 >= 2.0.0 < 2.4.5
Search vendor "Guzzlephp" for product "Psr-7" and version " >= 2.0.0 < 2.4.5"
-
Affected
Fedoraproject
Search vendor "Fedoraproject"
 Fedora
Search vendor "Fedoraproject" for product "Fedora"
 37
Search vendor "Fedoraproject" for product "Fedora" and version "37"
-
Affected
Fedoraproject
Search vendor "Fedoraproject"
 Fedora
Search vendor "Fedoraproject" for product "Fedora"
 38
Search vendor "Fedoraproject" for product "Fedora" and version "38"
-
Affected