CVE-2019-10371 Jenkins Gitlab Authentication Plugin vulnerable to Session Fixation

High 7.5 Published Updated

Attackers can impersonate users via session fixation in the Jenkins GitLab Authentication Plugin, requiring an upgrade to secure authentication.

Exploited in the wild
Not known
Login needed
Not needed
Attackable
Over the internet
Victim action needed
Not needed
Fix
Available

What is CVE-2019-10371?

CVE-2019-10371 is a high-severity authentication bypass vulnerability in Jenkins Gitlab Authentication Plugin, published on 7 Aug 2019. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

A session fixation vulnerability in Jenkins Gitlab Authentication Plugin 1.4 and earlier in GitLabSecurityRealm.java allows unauthorized attackers to impersonate another user if they can control the pre-authentication session.

Weakness: CWE-384

Which versions are affected by CVE-2019-10371?

2 open source packages ship an affected version, including org.jenkins-ci.plugins:gitlab-oauth. It affects 1 product.

PackageAffectedFixed in
org.jenkins-ci.plugins:gitlab-oauth MavenAll versions1.5
org.jenkins-ci.plugins:gitlab-oauth MavenAll versions1.5

Products include Jenkins Gitlab Oauth.

How do I fix CVE-2019-10371?

Upgrade org.jenkins-ci.plugins:gitlab-oauth to 1.5 or later.

Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.

Is CVE-2019-10371 being exploited?

There is no known exploitation of CVE-2019-10371 in the wild and no public exploit code.

Sources

Also known as GHSA-682g-c99v-9r2g.

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