CVE-2023-41937: Bitbucket push and pull request SSRF Vulnerability Vulnerability

HIGH
Advisory Identifier: GHSA-vrpg-c7c4-8mpx
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CVSS 7.5
CWE-918
Published
Advisory Summary

CVE-2023-41937 is a HIGH (CVSS 7.5) ssrf vulnerability vulnerability (CWE-918: Server-Side Request Forgery (SSRF)) affecting Bitbucket push and pull request libraries in the Maven ecosystem. The issue involves ssrf vulnerability in jenkins bitbucket push and pull request plugin allows capturing credentials. Remediation is available by upgrading affected packages to version 2.8.4.

CVE-2023-41937 at a Glance

CVE Identifier CVE-2023-41937
GHSA Identifier GHSA-vrpg-c7c4-8mpx
Severity HIGH
CVSS v3.1 Base Score 7.5
CWE Classification CWE-918: Server-Side Request Forgery (SSRF)
Affected Product Bitbucket push and pull request
Package Ecosystem Maven
Published Date
Last Updated

Security Impact

CVSS: 7.5

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N).

Attack Vector Network (AV:N)
Attack Complexity Low (AC:L)
Privileges Required None (PR:N)
User Interaction None (UI:N)
Scope Unchanged (S:U)
Confidentiality High (C:H)
Integrity None (I:N)
Availability None (A:N)

How to Fix CVE-2023-41937

To remediate this vulnerability, upgrade all affected Bitbucket push and pull request dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

io.jenkins.plugins:bitbucket-push-and-pull-request fixed: 2.8.4 
<dependency>
    <groupId>io.jenkins.plugins</groupId>
    <artifactId>bitbucket-push-and-pull-request</artifactId>
    <version>2.8.4</version>
</dependency>
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

mvn dependency:tree -Dincludes=io.jenkins.plugins

How to Check if You Are Affected

To determine whether your Java application is affected by CVE-2023-41937, inspect your build dependencies using the Maven Dependency Plugin:

mvn dependency:tree -Dincludes=io.jenkins.plugins

Analyze the terminal output to locate any version of Bitbucket push and pull request in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 2.8.4), your application is affected.

Note: The mvn dependency:tree -Dincludes=io.jenkins.plugins command inspects the resolved dependency graph declared in your project's POM files; it does not perform automated security scanning or inspect runtime dynamic classpaths. Always verify runtime container classpaths and shaded JARs.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-918: Server-Side Request Forgery (SSRF), where the web server receives a url or similar request from an upstream component and retrieves the contents of this url, but it does not sufficiently ensure that the request is being sent to the expected destination. In Bitbucket push and pull request, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

Jenkins Bitbucket Push and Pull Request Plugin 2.4.0 through 2.8.3 (both inclusive) trusts values provided in the webhook payload, including certain URLs, and uses configured Bitbucket credentials to connect to those URLs, allowing attackers to capture Bitbucket credentials stored in Jenkins by sending a crafted webhook payload.

CVE-2023-41937 Affected Bitbucket push and pull request Versions

1 component(s)
Fixed Versions:
2.8.4
Product / Package Ecosystem Affected Versions Fixed Version
io.jenkins.plugins:bitbucket-push-and-pull-request
maven/io.jenkins.plugins/bitbucket-push-and-pull-request
Maven
≥ 2.4.0
< 2.8.4
2.8.4

References

NVD — CVE-2023-41937 NVD
https://nvd.nist.gov/vuln/detail/CVE-2023-41937
Bitbucket push and pull request Security Information SECURITY
https://www.jenkins.io/security/advisory/2023-09-06/#SECURITY-3165
Bitbucket push and pull request Security Information SECURITY
http://www.openwall.com/lists/oss-security/2023/09/06/9

Frequently Asked Questions

What is CVE-2023-41937?
CVE-2023-41937 is a security vulnerability in Bitbucket push and pull request involving SSRF vulnerability in Jenkins Bitbucket Push and Pull Request Plugin allows capturing credentials under CWE-918: Server-Side Request Forgery (SSRF).
Which Bitbucket push and pull request versions are affected?
Affected versions include releases prior to 2.8.4 across affected packages: io.jenkins.plugins:bitbucket-push-and-pull-request.
What version fixes CVE-2023-41937?
Upgrading to 2.8.4 (or the latest patched release for your respective branch) resolves the vulnerability.
Is bitbucket-push-and-pull-request affected?
Yes, io.jenkins.plugins:bitbucket-push-and-pull-request is affected in releases prior to 2.8.4. Upgrade your dependency to 2.8.4 or later.
What is the CVSS score of CVE-2023-41937?
CVE-2023-41937 has a CVSS v3.1 base score of 7.5 (HIGH) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.
What CWE is associated with CVE-2023-41937?
CVE-2023-41937 is classified under CWE-918: Server-Side Request Forgery (SSRF) (The web server receives a URL or similar request from an upstream component and retrieves the contents of this URL, but it does not sufficiently ensure that the request is being sent to the expected destination.).
How can I check Maven dependencies for CVE-2023-41937?
Run the dependency tree command: 'mvn dependency:tree -Dincludes=io.jenkins.plugins'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-vrpg-c7c4-8mpx",
  "modified" : "2024-01-30T23:07:57Z",
  "published" : "2023-09-06T15:30:26Z",
  "aliases" : [ "CVE-2023-41937" ],
  "summary" : "SSRF vulnerability in Jenkins Bitbucket Push and Pull Request Plugin allows capturing credentials",
  "details" : "Jenkins Bitbucket Push and Pull Request Plugin 2.4.0 through 2.8.3 (both inclusive) trusts values provided in the webhook payload, including certain URLs, and uses configured Bitbucket credentials to connect to those URLs, allowing attackers to capture Bitbucket credentials stored in Jenkins by sending a crafted webhook payload.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Maven",
      "name" : "io.jenkins.plugins:bitbucket-push-and-pull-request"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "2.4.0"
      }, {
        "fixed" : "2.8.4"
      } ]
    } ],
    "database_specific" : {
      "last_known_affected_version_range" : "<= 2.8.3"
    }
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2023-41937"
  }, {
    "type" : "WEB",
    "url" : "https://www.jenkins.io/security/advisory/2023-09-06/#SECURITY-3165"
  }, {
    "type" : "WEB",
    "url" : "http://www.openwall.com/lists/oss-security/2023/09/06/9"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-918" ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2024-01-30T23:07:57Z",
    "nvd_published_at" : "2023-09-06T13:15:10Z"
  }
}