CVE-2023-29197 Improper header name validation in guzzlehttp/psr7

What is CVE-2023-29197?

CVE-2023-29197 is a medium-severity vulnerability in Fedoraproject Fedora, published on 17 Apr 2023. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

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.

Weakness: CWE-436

Which versions are affected by CVE-2023-29197?

4 open source packages ship an affected version, including guzzlehttp/psr7. It affects 2 products.

Products include Fedoraproject Fedora, Guzzlephp Psr-7.

How do I fix CVE-2023-29197?

Upgrade guzzlehttp/psr7 to a fixed version for your release line: 1.9.1 or 2.4.5.

Is CVE-2023-29197 being exploited?

There is no known exploitation of CVE-2023-29197 in the wild and no public exploit code.

Other vulnerabilities in Fedoraproject Fedora

• CVE-2024-4577 PHP-CGI OS Command Injection Exploited Critical 9.8
• CVE-2021-39226 Grafana Authentication Bypass Exploited Critical 9.8
• CVE-2019-5544 VMware ESXi and Horizon DaaS OpenSLP Heap-Based Buffer Overflow Exploited Critical 9.8
• CVE-2024-4947 Google Chromium V8 Type Confusion Exploited Critical 9.6
• CVE-2024-4671 Google Chromium Visuals Use-After-Free Exploited Critical 9.6

All Fedoraproject Fedora vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as CLSA-2026-1788333194, DEBIAN-CVE-2023-29197, DLA-3705-1, GHSA-wxmh-65f7-jcvw, UBUNTU-CVE-2023-29197, USN-6671-1.