Eclipse Jetty up to 9.4.29.v20200521 Long Request HTTP Response Header Memory operation after expiration

Summaryinfo

A vulnerability, which was classified as problematic, was found in Eclipse Jetty up to 9.4.29.v20200521. This impacts an unknown function of the component Long Request Handler. The manipulation as part of HTTP Response Header results in operation after expiration (Memory). This vulnerability is reported as CVE-2019-17638. The attack can be launched remotely. No exploit exists.

Detailsinfo

A vulnerability, which was classified as problematic, was found in Eclipse Jetty up to 9.4.29.v20200521. Affected is some unknown functionality of the component Long Request Handler. The manipulation as part of a HTTP Response Header leads to a operation after expiration vulnerability (Memory). CWE is classifying the issue as CWE-672. The product uses, accesses, or otherwise operates on a resource after that resource has been expired, released, or revoked. This is going to have an impact on confidentiality. CVE summarizes:

In Eclipse Jetty, versions 9.4.27.v20200227 to 9.4.29.v20200521, in case of too large response headers, Jetty throws an exception to produce an HTTP 431 error. When this happens, the ByteBuffer containing the HTTP response headers is released back to the ByteBufferPool twice. Because of this double release, two threads can acquire the same ByteBuffer from the pool and while thread1 is about to use the ByteBuffer to write response1 data, thread2 fills the ByteBuffer with response2 data. Thread1 then proceeds to write the buffer that now contains response2 data. This results in client1, which issued request1 and expects responses, to see response2 which could contain sensitive data belonging to client2 (HTTP session ids, authentication credentials, etc.).

The weakness was disclosed 07/09/2020 (Website). The advisory is available at bugs.eclipse.org. This vulnerability is traded as CVE-2019-17638 since 10/16/2019. The exploitability is told to be difficult. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. The technical details are unknown and an exploit is not available.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

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Productinfo

Vendor

• Eclipse

Name

• Jetty

Version

• 9.4.29.v20200521

License

• free

CPE 2.3info

• 🔍

CPE 2.2info

• 🔍

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