Improper Validation of Syntactic Correctness of Input Affecting rh-sso7-keycloak-server package, versions <0:18.0.12-1.redhat_00001.1.el7sso
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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- published14 Feb 2024
- disclosed18 Apr 2023
Introduced: 18 Apr 2023
CVE-2023-26049 (opens in a new tab)How to fix?
Upgrade RHEL:7 rh-sso7-keycloak-server to version 0:18.0.12-1.redhat_00001.1.el7sso or higher.
This issue was patched in RHSA-2024:0798.
NVD Description
Note: Versions mentioned in the description apply only to the upstream rh-sso7-keycloak-server package and not the rh-sso7-keycloak-server package as distributed by RHEL.
See How to fix? for RHEL:7 relevant fixed versions and status.
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.
References
- https://access.redhat.com/security/cve/CVE-2023-26049
- https://github.com/eclipse/jetty.project/pull/9339
- https://github.com/eclipse/jetty.project/pull/9352
- https://github.com/eclipse/jetty.project/security/advisories/GHSA-p26g-97m4-6q7c
- https://lists.debian.org/debian-lts-announce/2023/09/msg00039.html
- https://security.netapp.com/advisory/ntap-20230526-0001/
- https://www.debian.org/security/2023/dsa-5507
- https://www.rfc-editor.org/rfc/rfc2965
- https://www.rfc-editor.org/rfc/rfc6265