CVE-2018-10380

kwallet-pam in KDE KWallet before 5.12.6 allows local users to obtain ownership of arbitrary files via a symlink attack.

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

• https://bugzilla.suse.com/show_bug.cgi?id=1090863
• https://commits.kde.org/kwallet-pam/01d4143fda5bddb6dca37b23304dc239a5fb38b5
• https://commits.kde.org/kwallet-pam/2134dec85ce19d6378d03cddfae9e5e464cb24c0
• https://commits.kde.org/kwallet-pam/802f305d81f8771c4f4a8bd7fd0e368ffc6f9b3b
• https://commits.kde.org/kwallet-pam/99abc7fde21f40cc6da5feb6ee766cc46fcca1f8
• https://www.debian.org/security/2018/dsa-4200
• https://www.kde.org/info/security/advisory-20180503-1.txt