CVE-2015-5287

The abrt-hook-ccpp help program in Automatic Bug Reporting Tool (ABRT) before 2.7.1 allows local users with certain permissions to gain privileges via a symlink attack on a file with a predictable name, as demonstrated by /var/tmp/abrt/abrt-hax-coredump or /var/spool/abrt/abrt-hax-coredump.

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://packetstormsecurity.com/files/154592/ABRT-sosreport-Privilege-Escalation.html
• http://rhn.redhat.com/errata/RHSA-2015-2505.html
• http://www.openwall.com/lists/oss-security/2015/12/01/1
• http://www.oracle.com/technetwork/topics/security/linuxbulletinoct2015-2719645.html
• http://www.securityfocus.com/bid/78137
• https://bugzilla.redhat.com/show_bug.cgi?id=1266837
• https://github.com/abrt/abrt/commit/3c1b60cfa62d39e5fff5a53a5bc53dae189e740e
• https://www.exploit-db.com/exploits/38832/