What is CVE-2019-3881?

CVE-2019-3881 is a high-severity vulnerability in Bundler, classified under Uncontrolled Search Path Element. CVSS score: 7.8/10. Published 2020-09-04.

How severe is CVE-2019-3881?

High severity. CVSS v3 base score is 7.8 out of 10.

Is CVE-2019-3881 known to be exploited?

2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Vulnerability in Bundler

CVE-2019-3881

Bundler prior to 2.1.0 uses a predictable path in /tmp/, created with insecure permissions as a storage location for gems, if locations under the user's home directory are not available. If Bundler is used in a scenario where the user does not have a writable home directory, an attacker could place malicious code in this directory that would be later loaded and executed.

EPSS: 0.005 (41.6th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

Affected products

Bundler
N/a Rubygem-bundler — versions bundler versions before 2.1.0

Weakness classification (CWE)

CWE-427 — Uncontrolled Search Path Element

Public proof-of-concept exploits

References

secalert@redhat.com (Patch, Third Party Advisory, Issue Tracking)

Frequently asked questions

What is CVE-2019-3881?: CVE-2019-3881 is a high-severity vulnerability in Bundler, classified under Uncontrolled Search Path Element. CVSS score: 7.8/10. Published 2020-09-04.
How severe is CVE-2019-3881?: High severity. CVSS v3 base score is 7.8 out of 10.
Is CVE-2019-3881 known to be exploited?: 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.