CVE-2019-16782
Severity CVSS v4.0:
Pending analysis
Type:
Unavailable / Other
Publication date:
18/12/2019
Last modified:
13/02/2025
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.
Impact
Base Score 3.x
6.30
Severity 3.x
MEDIUM
Base Score 2.0
4.30
Severity 2.0
MEDIUM
Vulnerable products and versions
CPE | From | Up to |
---|---|---|
cpe:2.3:a:rack:rack:*:*:*:*:*:ruby:*:* | 1.6.12 (excluding) | |
cpe:2.3:a:rack:rack:*:*:*:*:*:ruby:*:* | 2.0.0 (including) | 2.0.8 (excluding) |
cpe:2.3:o:fedoraproject:fedora:31:*:*:*:*:*:*:* | ||
cpe:2.3:o:opensuse:leap:15.1:*:*:*:*:*:*:* |
To consult the complete list of CPE names with products and versions, see this page
References to Advisories, Solutions, and Tools
- http://lists.opensuse.org/opensuse-security-announce/2020-02/msg00016.html
- http://www.openwall.com/lists/oss-security/2019/12/18/2
- http://www.openwall.com/lists/oss-security/2019/12/18/3
- http://www.openwall.com/lists/oss-security/2019/12/19/3
- http://www.openwall.com/lists/oss-security/2020/04/08/1
- http://www.openwall.com/lists/oss-security/2020/04/09/2
- https://github.com/rack/rack/commit/7fecaee81f59926b6e1913511c90650e76673b38
- https://github.com/rack/rack/security/advisories/GHSA-hrqr-hxpp-chr3
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/HZXMWILCICQLA2BYSP6I2CRMUG53YBLX/
- http://lists.opensuse.org/opensuse-security-announce/2020-02/msg00016.html
- http://www.openwall.com/lists/oss-security/2019/12/18/2
- http://www.openwall.com/lists/oss-security/2019/12/18/3
- http://www.openwall.com/lists/oss-security/2019/12/19/3
- http://www.openwall.com/lists/oss-security/2020/04/08/1
- http://www.openwall.com/lists/oss-security/2020/04/09/2
- https://github.com/rack/rack/commit/7fecaee81f59926b6e1913511c90650e76673b38
- https://github.com/rack/rack/security/advisories/GHSA-hrqr-hxpp-chr3
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/HZXMWILCICQLA2BYSP6I2CRMUG53YBLX/