CVE-2017-8108

Unspecified tests in Lynis before 2.5.0 allow local users to write to arbitrary files or possibly gain privileges via a symlink attack on a temporary file.

Weakness

The product attempts to access a file based on the filename, but it does not properly prevent that filename from identifying a link or shortcut that resolves to an unintended resource.

Affected Software

Potential Mitigations

• Follow the principle of least privilege when assigning access rights to entities in a software system.
• Denying access to a file can prevent an attacker from replacing that file with a link to a sensitive file. Ensure good compartmentalization in the system to provide protected areas that can be trusted.

Related Attack Patterns

• https://cwe.mitre.org/data/definitions/132.html
• https://cwe.mitre.org/data/definitions/17.html
• https://cwe.mitre.org/data/definitions/35.html
• https://cwe.mitre.org/data/definitions/76.html

References

• http://www.securityfocus.com/bid/99288
• https://cisofy.com/security/cve/cve-2017-8108/
• https://github.com/CISOfy/lynis/releases/tag/2.5.0
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/UJXMPYANXHI25NQZ36QMXNXANDRAA5YG/
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZJHLLWNW7NASVXCK24YBSIUQQPWGCMB5/