The implementation of realpath in libuv < 10.22.1, < 12.18.4, and < 14.9.0 used within Node.js incorrectly determined the buffer size which can result in a buffer overflow if the resolved path is longer than 256 bytes.

References

• https://nvd.nist.gov/vuln/detail/CVE-2020-8252
• https://hackerone.com/reports/965914
• https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/4OOYAMJVLLCLXDTHW3V5UXNULZBBK4O6/
• https://nodejs.org/en/blog/vulnerability/september-2020-security-releases/
• https://security.gentoo.org/glsa/202009-15
• https://security.netapp.com/advisory/ntap-20201009-0004/
• https://usn.ubuntu.com/4548-1/
• http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00011.html
• http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00023.html