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Improper header name validation in guzzlehttp/psr7

Moderate severity GitHub Reviewed Published Apr 17, 2023 in guzzle/psr7 • Updated Jan 9, 2024

Package

composer guzzlehttp/psr7 (Composer)

Affected versions

< 1.9.1
>= 2.0.0, < 2.4.5

Patched versions

1.9.1
2.4.5

Description

Impact

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.

Patches

The issue is patched in 1.9.1 and 2.4.5.

Workarounds

There are no known workarounds.

References

References

@GrahamCampbell GrahamCampbell published to guzzle/psr7 Apr 17, 2023
Published by the National Vulnerability Database Apr 17, 2023
Published to the GitHub Advisory Database Apr 19, 2023
Reviewed Apr 19, 2023
Last updated Jan 9, 2024

Severity

Moderate

CVSS overall score

This score calculates overall vulnerability severity from 0 to 10 and is based on the Common Vulnerability Scoring System (CVSS).
/ 10

CVSS v3 base metrics

Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
Low
Availability
None

CVSS v3 base metrics

Attack vector: More severe the more the remote (logically and physically) an attacker can be in order to exploit the vulnerability.
Attack complexity: More severe for the least complex attacks.
Privileges required: More severe if no privileges are required.
User interaction: More severe when no user interaction is required.
Scope: More severe when a scope change occurs, e.g. one vulnerable component impacts resources in components beyond its security scope.
Confidentiality: More severe when loss of data confidentiality is highest, measuring the level of data access available to an unauthorized user.
Integrity: More severe when loss of data integrity is the highest, measuring the consequence of data modification possible by an unauthorized user.
Availability: More severe when the loss of impacted component availability is highest.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

EPSS score

0.255%
(66th percentile)

Weaknesses

CVE ID

CVE-2023-29197

GHSA ID

GHSA-wxmh-65f7-jcvw

Source code

Credits

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