CVE-2020-2102
published 2020-01-29CVE-2020-2102: Jenkins 2.218 and earlier, LTS 2.204.1 and earlier used a non-constant time comparison function when validating an HMAC.
PriorityP427medium5.3CVSS 3.1
AVNACHPRLUINSUCHINAN
EPSS
1.40%
69.0th percentile
Jenkins 2.218 and earlier, LTS 2.204.1 and earlier used a non-constant time comparison function when validating an HMAC.
Affected
9 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| jenkins | code_coverage_plugin | — | — |
| jenkins | fortify_plugin | — | — |
| jenkins | jenkins | <= 2.204.1 | — |
| jenkins | jenkins | <= 2.218 | — |
| jenkins | jenkins_core | — | — |
| jenkins | jenkins_lts | — | — |
| jenkins | jenkins_weekly | — | — |
| jenkins | websphere_deployer_plugin | — | — |
| jenkins_project | jenkins | unspecified – 2.218 | — |
CVSS provenance
nvdv3.15.3MEDIUMCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N
nvdv2.03.5LOWAV:N/AC:M/Au:S/C:P/I:N/A:N
vendor_redhat5.3MEDIUM
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Jenkins
Jenkins Security Advisory 2020-01-29
vendor_jenkins·2020-01-29·CVSS 8.6
CVE-2020-2099 [HIGH] Jenkins Security Advisory 2020-01-29
Title: Jenkins Security Advisory 2020-01-29
Jenkins Security Advisory 2020-01-29
Jenkins Security Home
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This advisory announces vulnerabilities in the following Jenkins deliverables:
Jenkins (core)
Code Coverage
Plugin
Fortify
Plugin
WebSphere Deployer
Plugin
Descriptions
Inbound TCP Agent Protocol/3 authentication bypass
SECURITY-1682
/
CVE-2020-2099
Se
Red Hat
jenkins: Non-constant time HMAC comparison
vendor_redhat·2020-01-29·CVSS 5.3
CVE-2020-2102 [MEDIUM] CWE-385 jenkins: Non-constant time HMAC comparison
jenkins: Non-constant time HMAC comparison
Jenkins 2.218 and earlier, LTS 2.204.1 and earlier used a non-constant time comparison function when validating an HMAC.
OSV
Non-constant time HMAC comparison
osv·2022-05-24
CVE-2020-2102 [MEDIUM] Non-constant time HMAC comparison
Non-constant time HMAC comparison
Jenkins 2.218 and earlier, LTS 2.204.1 and earlier does not use a constant-time comparison when checking whether two HMACs are equal. This could potentially allow attackers to use statistical methods to obtain a valid HMAC for an attacker-controlled input value.
Jenkins 2.219, LTS 2.204.2 now uses a constant-time comparison when validating HMACs.
GHSA
Non-constant time HMAC comparison
ghsa·2022-05-24
CVE-2020-2102 [MEDIUM] CWE-203 Non-constant time HMAC comparison
Non-constant time HMAC comparison
Jenkins 2.218 and earlier, LTS 2.204.1 and earlier does not use a constant-time comparison when checking whether two HMACs are equal. This could potentially allow attackers to use statistical methods to obtain a valid HMAC for an attacker-controlled input value.
Jenkins 2.219, LTS 2.204.2 now uses a constant-time comparison when validating HMACs.
No detection rules found.
No public exploits indexed.
Bugzilla
CVE-2020-2102 jenkins: Non-constant time HMAC comparison [fedora-all]
bugzilla·2020-01-31·CVSS 5.3
CVE-2020-2102 [MEDIUM] CVE-2020-2102 jenkins: Non-constant time HMAC comparison [fedora-all]
CVE-2020-2102 jenkins: Non-constant time HMAC comparison [fedora-all]
This is an automatically created tracking bug! It was created to ensure
that one or more security vulnerabilities are fixed in affected versions
of fedora-all.
For comments that are specific to the vulnerability please use bugs filed
against the "Security Response" product referenced in the "Blocks" field.
For more information see:
http://fedoraproject.org/wiki/Security/TrackingBugs
When submitting as an update, use the fedpkg template provided in the next
comment(s). This will include the bug IDs of this tracking bug as well as
the relevant top-level CVE bugs.
Please also mention the CVE IDs being fixed in the RPM changelog and the
fedpkg commit message.
NOTE: this issue affects multiple supported versions of Fedo
Bugzilla
CVE-2020-2102 jenkins: Non-constant time HMAC comparison
bugzilla·2020-01-31·CVSS 5.3
CVE-2020-2102 [MEDIUM] CVE-2020-2102 jenkins: Non-constant time HMAC comparison
CVE-2020-2102 jenkins: Non-constant time HMAC comparison
Jenkins 2.218 and earlier, LTS 2.204.1 and earlier used a non-constant time comparison function when validating an HMAC.
References:
https://jenkins.io/security/advisory/2020-01-29/#SECURITY-1660
http://www.openwall.com/lists/oss-security/2020/01/29/1
Discussion:
Created jenkins tracking bugs for this issue:
Affects: fedora-all [bug 1797077]
---
"Any security advisory related updates to Jenkins core or the plugins we include in the OpenShift Jenkins master image will only occur in the v3.11 and v4.x branches of this repository."
https://github.com/openshift/jenkins/blob/master/README.md#jenkins-security-advisories-the-master-image-from-this-repository-and-the-oc-binary
---
This bug has been fixed by https://errata.devel.re
http://www.openwall.com/lists/oss-security/2020/01/29/1https://access.redhat.com/errata/RHBA-2020:0402https://access.redhat.com/errata/RHBA-2020:0675https://access.redhat.com/errata/RHSA-2020:0681https://access.redhat.com/errata/RHSA-2020:0683https://jenkins.io/security/advisory/2020-01-29/#SECURITY-1660http://www.openwall.com/lists/oss-security/2020/01/29/1https://access.redhat.com/errata/RHBA-2020:0402https://access.redhat.com/errata/RHBA-2020:0675https://access.redhat.com/errata/RHSA-2020:0681https://access.redhat.com/errata/RHSA-2020:0683https://jenkins.io/security/advisory/2020-01-29/#SECURITY-1660
2020-01-29
Published