CVE-2019-17638
jetty: double release of resource can lead to information disclosure
Severity Score
Exploit Likelihood
Affected Versions
Public Exploits
1Exploited in Wild
-Decision
Descriptions
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 other data. Thread1 then proceeds to write the buffer that now contains different data. This results in client1, which issued request1 seeing data from another request or response which could contain sensitive data belonging to client2 (HTTP session ids, authentication credentials, etc.). If the Jetty version cannot be upgraded, the vulnerability can be significantly reduced by configuring a responseHeaderSize significantly larger than the requestHeaderSize (12KB responseHeaderSize and 8KB requestHeaderSize).
En Eclipse Jetty, versiones 9.4.27.v20200227 hasta 9.4.29.v20200521, en el caso de encabezados de respuesta demasiado grandes, Jetty lanza una excepción para producir un error HTTP 431. Cuando esto sucede, el ByteBuffer que contiene los encabezados de respuesta HTTP es devuelto al ByteBufferPool dos veces. Debido a esta doble versión, dos subprocesos (hilos) pueden adquirir el mismo ByteBuffer del grupo y, mientras que thread1 está a punto de usar ByteBuffer para escribir datos de response1, thread2 llena el ByteBuffer con otros datos. Thread1 luego procede a escribir el búfer que ahora contiene datos diferentes. Esto resulta en que el cliente1, que emitió la petición1, ve los datos de otra petición o respuesta que podría contener datos sensibles pertenecientes al cliente2 (identificaciones de sesión HTTP, credenciales de autenticación, etc.). Si no se puede actualizar la versión del muelle, la vulnerabilidad se puede reducir significativamente configurando un responseHeaderSize significativamente mayor que el requestHeaderSize (12KB responseHeaderSize y 8KB requestHeaderSize)
CVSS Scores
SSVC
- Decision:-
Timeline
- 2019-10-16 CVE Reserved
- 2020-07-09 CVE Published
- 2021-02-09 First Exploit
- 2024-06-15 EPSS Updated
- 2024-08-05 CVE Updated
- ---------- Exploited in Wild
- ---------- KEV Due Date
CWE
- CWE-200: Exposure of Sensitive Information to an Unauthorized Actor
- CWE-672: Operation on a Resource after Expiration or Release
- CWE-675: Multiple Operations on Resource in Single-Operation Context
CAPEC
References (20)
| URL | Date | SRC |
|---|---|---|
| https://github.com/forse01/CVE-2019-17638-Jetty | 2021-02-09 |
| URL | Date | SRC |
|---|
Affected Vendors, Products, and Versions
| Vendor | Product | Version | Other | Status | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Vendor | Product | Version | Other | Status | <-- --> | Vendor | Product | Version | Other | Status |
| Eclipse Search vendor "Eclipse" | Jetty Search vendor "Eclipse" for product "Jetty" | 9.4.27 Search vendor "Eclipse" for product "Jetty" and version "9.4.27" | 20200227 |
Affected
| ||||||
| Eclipse Search vendor "Eclipse" | Jetty Search vendor "Eclipse" for product "Jetty" | 9.4.28 Search vendor "Eclipse" for product "Jetty" and version "9.4.28" | 20200408 |
Affected
| ||||||
| Eclipse Search vendor "Eclipse" | Jetty Search vendor "Eclipse" for product "Jetty" | 9.4.29 Search vendor "Eclipse" for product "Jetty" and version "9.4.29" | 20200521 |
Affected
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