5.9 Medium
CVSS3
Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
NONE
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
4.3 Medium
CVSS2
Access Vector
NETWORK
Access Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
NONE
Availability Impact
NONE
AV:N/AC:M/Au:N/C:P/I:N/A:N
0.003 Low
EPSS
Percentile
64.5%
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.
OS | Version | Architecture | Package | Version | Filename |
---|---|---|---|---|---|
ubuntu | 18.04 | noarch | ruby-rack | < 1.6.4-4ubuntu0.2+esm1 | UNKNOWN |
ubuntu | 16.04 | noarch | ruby-rack | < 1.6.4-3ubuntu0.2+esm1 | UNKNOWN |
ubuntu | 14.04 | noarch | ruby-rack | < 1.5.2-3+deb8u3ubuntu1~esm3) Available with Ubuntu Pro or Ubuntu Pro (Infra-only | UNKNOWN |
ubuntu | 20.04 | noarch | ruby-rack | < 2.0.7-2ubuntu0.1+esm1 | UNKNOWN |
www.openwall.com/lists/oss-security/2019/12/18/2
www.openwall.com/lists/oss-security/2019/12/18/3
www.openwall.com/lists/oss-security/2019/12/19/3
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-16782
github.com/rack/rack/commit/7fecaee81f59926b6e1913511c90650e76673b38
github.com/rack/rack/security/advisories/GHSA-hrqr-hxpp-chr3
launchpad.net/bugs/cve/CVE-2019-16782
nvd.nist.gov/vuln/detail/CVE-2019-16782
security-tracker.debian.org/tracker/CVE-2019-16782
ubuntu.com/security/notices/USN-5253-1
5.9 Medium
CVSS3
Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
NONE
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
4.3 Medium
CVSS2
Access Vector
NETWORK
Access Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
NONE
Availability Impact
NONE
AV:N/AC:M/Au:N/C:P/I:N/A:N
0.003 Low
EPSS
Percentile
64.5%