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Vulnerability · Published Apr 18, 2023 · Assigned by GitHub_M

CVE-2023-26049Cookie parsing of quoted values can exfiltrate values from other cookies in Eclipse Jetty

Low 2.4

In plain English

A low-severity information exposure in jetty.project from eclipse. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 1.3% (higher than 71% of all known vulnerabilities). Ready-made attack tooling exists: public proof-of-concept code. Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)2.4Low
Exploit odds (30 days)1.3%top 29.4% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack tooling1Public PoC

Official 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.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:12jetty99.4.50-4+deb12u1DSA-5507-1
Debian:12jetty99.4.50-4+deb12u1DEBIAN-CVE-2023-26049
Debian:13jetty99.4.52-1DEBIAN-CVE-2023-26049
Debian:14jetty99.4.52-1DEBIAN-CVE-2023-26049
Mavenorg.eclipse.jetty:jetty-server11.0.14GHSA-p26g-97m4-6q7c
Mavenorg.eclipse.jetty:jetty-server12.0.0.beta0GHSA-p26g-97m4-6q7c
Mavenorg.eclipse.jetty:jetty-server9.4.51.v20230217GHSA-p26g-97m4-6q7c
Mavenorg.eclipse.jetty:jetty-server10.0.14GHSA-p26g-97m4-6q7c

Affected products (as reported)

VendorProductVersions
eclipse jetty.project < 9.4.51>= 10.0.0, < 10.0.14>= 11.0.0, < 11.0.14>= 12.0.0.alpha0, < 12.0.0.beta0

Weakness: CWE-200 · Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:L/I:N/A:N

References