8.6

CVE-2019-18837: crun_project crun Link Following

CVSS: 8.6v3.1HighModified
Published 13-11-2019Last modified 05-08-2024
Open JSON

Vulnerability summary

CVE-2019-18837 is a high (CVSS 8.6) Link Following vulnerability in crun_project crun. EPSS estimates a 1.42% chance of exploitation in the next 30 days, higher than 72.5% of scored vulnerabilities.

Overall risk
35/100
0100
Medium · default modelHow is this calculated?
CVSS score
8.6/10
010
High · v3.1 (NVD)
EPSS score
1.42%
0%100%
Low · -0.01 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 13-11-2019
    PublishedVulnerability first disclosed.
  2. 05-08-2024
    Last modifiedVulnerability information updated.

Description

An issue was discovered in crun before 0.10.5. With a crafted image, it doesn't correctly check whether a target is a symlink, resulting in access to files outside of the container. This occurs in libcrun/linux.c and libcrun/chroot_realpath.c.

CVSS metrics

2 scores · 1 source · 2 versions

EPSS trend

Probability

1.42%

Chance of exploitation in the next 30 days

Percentile

73%

Versus all other CVEs

30-day change

-0.01 pp

From 1.43% on 21-09-2026

21-09-202621-10-2026
EPSS score
1.42%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Crun1 product
Crun_project1 product
Fedoraproject1 product

3 vendors · 3 products

References

4 links