Vulnerability Description
There's a possible information leak / session hijack vulnerability in Rack (RubyGem rack). This vulnerability is patched in versions 1.6.12 and 2.0.8. Attackers may be able to find and hijack sessions by using timing attacks targeting the session id. Session ids are usually stored and indexed in a database that uses some kind of scheme for speeding up lookups of that session id. By carefully measuring the amount of time it takes to look up a session, an attacker may be able to find a valid session id and hijack the session. The session id itself may be generated randomly, but the way the session is indexed by the backing store does not use a secure comparison.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Rack | Rack | < 1.6.12 |
| Fedoraproject | Fedora | 31 |
| Opensuse | Leap | 15.1 |
Related Weaknesses (CWE)
References
- http://lists.opensuse.org/opensuse-security-announce/2020-02/msg00016.htmlThird Party Advisory
- http://www.openwall.com/lists/oss-security/2019/12/18/2Mailing ListThird Party Advisory
- http://www.openwall.com/lists/oss-security/2019/12/18/3Mailing ListThird Party Advisory
- http://www.openwall.com/lists/oss-security/2019/12/19/3Mailing ListThird Party Advisory
- http://www.openwall.com/lists/oss-security/2020/04/08/1Mailing ListPatchThird Party Advisory
- http://www.openwall.com/lists/oss-security/2020/04/09/2Mailing ListThird Party Advisory
- https://github.com/rack/rack/commit/7fecaee81f59926b6e1913511c90650e76673b38PatchThird Party Advisory
- https://github.com/rack/rack/security/advisories/GHSA-hrqr-hxpp-chr3Third Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro
- http://lists.opensuse.org/opensuse-security-announce/2020-02/msg00016.htmlThird Party Advisory
- http://www.openwall.com/lists/oss-security/2019/12/18/2Mailing ListThird Party Advisory
- http://www.openwall.com/lists/oss-security/2019/12/18/3Mailing ListThird Party Advisory
- http://www.openwall.com/lists/oss-security/2019/12/19/3Mailing ListThird Party Advisory
- http://www.openwall.com/lists/oss-security/2020/04/08/1Mailing ListPatchThird Party Advisory
- http://www.openwall.com/lists/oss-security/2020/04/09/2Mailing ListThird Party Advisory
FAQ
What is CVE-2019-16782?
CVE-2019-16782 is a vulnerability with a CVSS score of 6.3 (MEDIUM). There's a possible information leak / session hijack vulnerability in Rack (RubyGem rack). This vulnerability is patched in versions 1.6.12 and 2.0.8. Attackers may be able to find and hijack sessions...
How severe is CVE-2019-16782?
CVE-2019-16782 has been rated MEDIUM with a CVSS base score of 6.3/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2019-16782?
Check the references section above for vendor advisories and patch information. Affected products include: Rack Rack, Fedoraproject Fedora, Opensuse Leap.