Eclipse Jetty's cookie parsing of quoted values can exfiltrate values from other cookies
Package
Affected versions
>= 10.0.0, < 10.0.14
>= 11.0.0, < 11.0.14
>= 12.0.0alpha0, < 12.0.0.beta0
< 9.4.51.v20230217
Patched versions
10.0.14
11.0.14
12.0.0.beta0
9.4.51.v20230217
Description
Published by the National Vulnerability Database
Apr 18, 2023
Published to the GitHub Advisory Database
Apr 18, 2023
Reviewed
Apr 18, 2023
Last updated
Nov 6, 2023
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 nameDISPLAY_LANGUAGEand a value ofb; JSESSIONID=1337; c=dinstead of 3 separate cookies.
Impact
This has security implications because if, say,
JSESSIONIDis anHttpOnlycookie, and theDISPLAY_LANGUAGEcookie value is rendered on the page, an attacker can smuggle theJSESSIONIDcookie into theDISPLAY_LANGUAGEcookie 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.Patches
Workarounds
No workarounds
References
References