CVEvulnerability
CVE-2019-16782
5.9 MEDIUM
Official page ↗
- Status
- Modified
- Published
- 2019-12-18
- Last modified
- 2026-06-17
- Assigner
- [email protected]
- CVSS 3.1 ([email protected])
- 6.3 MEDIUM — CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:N/A:N
- CVSS 3.1 ([email protected])
- 5.9 MEDIUM — CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
- CVSS 2.0 ([email protected])
- 4.3 MEDIUM — AV:N/AC:M/Au:N/C:P/I:N/A:N
- Weaknesses
- CWE-203, CWE-208
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.
Affected configurations
• rack rack (< 1.6.12)
• rack rack (>= 2.0.0 < 2.0.8)
• fedoraproject fedora 31
• opensuse leap 15.1
Related
References
- http://lists.opensuse.org/opensuse-security-announce/2020-02/msg00016.html Third Party Advisory
- http://www.openwall.com/lists/oss-security/2019/12/18/2 Mailing List, Third Party Advisory
- http://www.openwall.com/lists/oss-security/2019/12/18/3 Mailing List, Third Party Advisory
- http://www.openwall.com/lists/oss-security/2019/12/19/3 Mailing List, Third Party Advisory
- http://www.openwall.com/lists/oss-security/2020/04/08/1 Mailing List, Patch, Third Party Advisory
- http://www.openwall.com/lists/oss-security/2020/04/09/2 Mailing List, Third Party Advisory
- https://github.com/rack/rack/commit/7fecaee81f59926b6e1913511c90650e76673b38 Patch, Third Party Advisory
- https://github.com/rack/rack/security/advisories/GHSA-hrqr-hxpp-chr3 Third Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/HZXMWILCICQLA2BYSP6I2CRMUG53YBLX/ lists.fedoraproject.org
- http://lists.opensuse.org/opensuse-security-announce/2020-02/msg00016.html Third Party Advisory
- http://www.openwall.com/lists/oss-security/2019/12/18/2 Mailing List, Third Party Advisory
- http://www.openwall.com/lists/oss-security/2019/12/18/3 Mailing List, Third Party Advisory
- http://www.openwall.com/lists/oss-security/2019/12/19/3 Mailing List, Third Party Advisory
- http://www.openwall.com/lists/oss-security/2020/04/08/1 Mailing List, Patch, Third Party Advisory
- http://www.openwall.com/lists/oss-security/2020/04/09/2 Mailing List, Third Party Advisory
- https://github.com/rack/rack/commit/7fecaee81f59926b6e1913511c90650e76673b38 Patch, Third Party Advisory
- https://github.com/rack/rack/security/advisories/GHSA-hrqr-hxpp-chr3 Third Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/HZXMWILCICQLA2BYSP6I2CRMUG53YBLX/ lists.fedoraproject.org