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  5. CVE-2018-6558

CVE-2018-6558: Privilege Escalation in fscrypt

June 23, 2021 (updated February 9, 2023)

The pam_fscrypt module in fscrypt before 0.2.4 may incorrectly restore primary and supplementary group IDs to the values associated with the root user, which allows attackers to gain privileges via a successful login through certain applications that use Linux-PAM (aka pam).

References

  • github.com/advisories/GHSA-qj26-7grj-whg3
  • github.com/google/fscrypt/commit/3022c1603d968c22f147b4a2c49c4637dd1be91b
  • github.com/google/fscrypt/commit/315f9b042237200174a1fb99427f74027e191d66
  • github.com/google/fscrypt/issues/77
  • launchpad.net/bugs/1787548
  • nvd.nist.gov/vuln/detail/CVE-2018-6558
  • pkg.go.dev/vuln/GO-2020-0027

Code Behaviors & Features

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Affected versions

All versions before 0.2.4

Fixed versions

  • v0.2.4

Solution

Upgrade to version 0.2.4 or above.

Impact 6.5 MEDIUM

CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N

Learn more about CVSS

Source file

go/github.com/google/fscrypt/pam/CVE-2018-6558.yml

Spotted a mistake? Edit the file on GitLab.

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