Ecosyste.ms: Advisories

Security Advisories: GSA_kwCzR0hTQS1majZmLTY5MzMtODM5as4AAjcN

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.

Permalink: https://github.com/advisories/GHSA-fj6f-6933-839j
JSON: https://advisories.ecosyste.ms/api/v1/advisories/GSA_kwCzR0hTQS1majZmLTY5MzMtODM5as4AAjcN
Source: GitHub Advisory Database
Origin: Unspecified
Severity: Moderate
Classification: General
Published: about 1 year ago
Updated: 4 months ago

CVSS Score: 5.3
CVSS vector: CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N

Identifiers: GHSA-fj6f-6933-839j, CVE-2020-2102
References:

• https://nvd.nist.gov/vuln/detail/CVE-2020-2102
• https://access.redhat.com/errata/RHBA-2020:0402
• https://access.redhat.com/errata/RHBA-2020:0675
• https://access.redhat.com/errata/RHSA-2020:0681
• https://access.redhat.com/errata/RHSA-2020:0683
• https://jenkins.io/security/advisory/2020-01-29/#SECURITY-1660
• http://www.openwall.com/lists/oss-security/2020/01/29/1
• https://github.com/advisories/GHSA-fj6f-6933-839j

Affected Packages