CVE-2015-7529

sosreport in SoS 3.x allows local users to obtain sensitive information from sosreport files or gain privileges via a symlink attack on an archive file in a temporary directory, as demonstrated by sosreport-$hostname-$date.tar in /tmp/sosreport-$hostname-$date.

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://rhn.redhat.com/errata/RHSA-2016-0152.html
• http://rhn.redhat.com/errata/RHSA-2016-0188.html
• http://www.securityfocus.com/bid/83162
• http://www.ubuntu.com/usn/USN-2845-1
• https://access.redhat.com/errata/RHSA-2016:0152
• https://access.redhat.com/errata/RHSA-2016:0188
• https://bugzilla.redhat.com/show_bug.cgi?id=1282542
• https://github.com/sosreport/sos/issues/696