Eclipse Jetty prior 9.4.51/10.0.14/11.0.14/12.0.0.beta0 Cookie Parser improper validation of syntactic correctness of input

Summaryinfo

A vulnerability categorized as problematic has been discovered in Eclipse Jetty. The impacted element is an unknown function of the component Cookie Parser. The manipulation results in improper validation of syntactic correctness of input. This vulnerability is cataloged as CVE-2023-26049. The attack may be launched remotely. There is no exploit available. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as problematic, was found in Eclipse Jetty. Affected is an unknown functionality of the component Cookie Parser. The manipulation with an unknown input leads to a improper validation of syntactic correctness of input vulnerability. CWE is classifying the issue as CWE-1286. The product receives input that is expected to be well-formed - i.e., to comply with a certain syntax - but it does not validate or incorrectly validates that the input complies with the syntax. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

Jetty is a java based web server and servlet engine. Nonstandard cookie parsing in Jetty may allow an attacker to smuggle cookies within other cookies, or otherwise perform unintended behavior by tampering with the cookie parsing mechanism. If Jetty sees a cookie VALUE that starts with `"` (double quote), it will continue to read the cookie string until it sees a closing quote -- even if a semicolon is encountered. So, a cookie header such as: `DISPLAY_LANGUAGE="b; JSESSIONID=1337; c=d"` will be parsed as one cookie, with the name DISPLAY_LANGUAGE and a value of b; JSESSIONID=1337; c=d instead of 3 separate cookies. This has security implications because if, say, JSESSIONID is an HttpOnly cookie, and the DISPLAY_LANGUAGE cookie value is rendered on the page, an attacker can smuggle the JSESSIONID cookie into the DISPLAY_LANGUAGE cookie and thereby exfiltrate it. This is significant when an intermediary is enacting some policy based on cookies, so a smuggled cookie can bypass that policy yet still be seen by the Jetty server or its logging system. This issue has been addressed in versions 9.4.51, 10.0.14, 11.0.14, and 12.0.0.beta0 and users are advised to upgrade. There are no known workarounds for this issue.

The weakness was shared 04/19/2023 as GHSA-p26g-97m4-6q7c. The advisory is available at github.com. This vulnerability is traded as CVE-2023-26049 since 02/17/2023. Successful exploitation requires user interaction by the victim. The technical details are unknown and an exploit is not available.

Upgrading to version 9.4.51, 10.0.14, 11.0.14 or 12.0.0.beta0 eliminates this vulnerability. Applying a patch is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

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Productinfo

Vendor

• Eclipse

Name

• Jetty

License

• free

CPE 2.3info

• 🔍

CPE 2.2info

• 🔍

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