CVE-2023-26049
Vulnérabilité faible dans jetty.project (eclipse)
Description
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.
Gravité et risque d'exploitation
CVE-2023-26049 obtient un score CVSS de 2.4/10, soit une gravité faible. Selon le modèle EPSS, la probabilité qu'elle soit exploitée dans les 30 prochains jours est de 1.30 %, ce qui la place devant 70.0 % des CVE référencées.
Que faire ?
- Vérifiez si jetty.project (versions >= 11.0.0, < 11.0.14, >= 10.0.0, < 10.0.14, >= 12.0.0.alpha0, < 12.0.0.beta0, < 9.4.51) est présent sur votre parc.
- Appliquez le correctif ou la version corrigée indiqués dans les références de l'éditeur.
- À défaut de correctif, limitez l'exposition (filtrage réseau, désactivation du composant).
- Automatisez la détection : les agents CVE Heimdall (gratuits, open source) corrèlent l'inventaire de vos serveurs avec la base CVE.
Références
- https://github.com/eclipse/jetty.project/security/advisories/GHSA-p26g-97m4-6q7c
- https://github.com/eclipse/jetty.project/pull/9339
- https://github.com/eclipse/jetty.project/pull/9352
- https://www.rfc-editor.org/rfc/rfc2965
- https://www.rfc-editor.org/rfc/rfc6265
- https://security.netapp.com/advisory/ntap-20230526-0001/
- https://www.debian.org/security/2023/dsa-5507
- https://lists.debian.org/debian-lts-announce/2023/09/msg00039.html