Vulnerability · Published Apr 7, 2021 · Assigned by jenkins
CVE-2021-21639
Medium 4.3
In plain English
A medium-severity security flaw in Jenkins from Jenkins project. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 2.7% (higher than 86% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS NVD)4.3Medium
Exploit odds (30 days)2.7%top 13.9% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack toolingNoneno public tooling known
Official description
Jenkins 2.286 and earlier, LTS 2.277.1 and earlier does not validate the type of object created after loading the data submitted to the `config.xml` REST API endpoint of a node, allowing attackers with Computer/Configure permission to replace a node with one of a different type.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine:v3.20 | jenkins | 2.287-r0 | ALPINE-CVE-2021-21639 |
| Alpine:v3.21 | jenkins | 2.287-r0 | ALPINE-CVE-2021-21639 |
| Alpine:v3.22 | jenkins | 2.287-r0 | ALPINE-CVE-2021-21639 |
| Alpine:v3.23 | jenkins | 2.287-r0 | ALPINE-CVE-2021-21639 |
| Alpine:v3.24 | jenkins | 2.287-r0 | ALPINE-CVE-2021-21639 |
| Maven | org.jenkins-ci.main:jenkins-core | 2.277.2 | GHSA-pvwx-3jx5-24r2 |
| Maven | org.jenkins-ci.main:jenkins-core | 2.287 | GHSA-pvwx-3jx5-24r2 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Jenkins project | Jenkins | unspecified – through 2.286unspecified – through LTS 2.277.1 |
References
- https://www.jenkins.io/security/advisory/2021-04-07/#SECURITY-1721 x_refsource_CONFIRM
- [oss-security] 20210407 Multiple vulnerabilities in Jenkins and Jenkins plugins mailing-list, x_refsource_MLIST