CVE-2019-8320
CVSS v3
7.4
HIGH
EPSS Score
8.5 %
exploit probability
CISA KEV
No
known exploited
Exploitation
—
SSVC status
Description
A Directory Traversal issue was discovered in RubyGems 2.7.6 and later through 3.0.2. Before making new directories or touching files (which now include path-checking code for symlinks), it would delete the target destination. If that destination was hidden behind a symlink, a malicious gem could delete arbitrary files on the user's machine, presuming the attacker could guess at paths. Given how frequently gem is run as sudo, and how predictable paths are on modern systems (/tmp, /usr, etc.), this could likely lead to data loss or an unusable system.
Technical details
- Published
- 2019-06-06
Frequently asked questions
What is CVE-2019-8320?
A Directory Traversal issue was discovered in RubyGems 2.7.6 and later through 3.0.2. Before making new directories or touching files (which now include path-checking code for symlinks), it would delete the target destination. If that destination was hidden behind a symlink, a malicious gem could delete arbitrary files on the user's machine, presuming the attacker could guess at paths. Given how frequently gem is run as sudo, and how predictable paths are on modern systems (/tmp, /usr, etc.), this could likely lead to data loss or an unusable system.
Is CVE-2019-8320 actively exploited?
Active exploitation of CVE-2019-8320 has not been confirmed. The EPSS score is 8.5%, indicating the estimated probability of exploitation in the next 30 days.
What is the CVSS score for CVE-2019-8320?
CVE-2019-8320 has a CVSS v3 base score of 7.4 (HIGH severity).
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