#VU107429 Inconsistent interpretation of HTTP requests in Apache Traffic Server - CVE-2024-53868

Vulnerability identifier: #VU107429

Vulnerability risk: Medium

CVSSv4.0: 1.2 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2024-53868

CWE-ID: CWE-444

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Apache Traffic Server
Server applications / Web servers

Vendor: Apache Foundation

Description

The vulnerability allows a remote attacker to perform HTTP request smuggling attacks.

The vulnerability exists due to improper validation of HTTP requests when handling chunked messages. A remote attacker can send a specially crafted HTTP request to the server and smuggle arbitrary HTTP headers.

Successful exploitation of vulnerability may allow an attacker to poison HTTP cache and perform phishing attacks.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Apache Traffic Server: 9.0.0 - 9.0.2, 9.1.0 - 9.1.4, 9.2.0 - 9.2.9, 10.0.0 - 10.0.4

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External links
https://www.openwall.com/lists/oss-security/2025/04/02/4
https://lists.apache.org/thread/rwyx91rsrnmpjbm04footfjjf6m9d1c9

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.