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

Name	Vendor	Start Version	End Version
Sos	Sos_project	3.0 (including)	3.8 (including)
Red Hat Enterprise Linux 6	RedHat	sos-0:3.2-28.el6_7.2	*
Red Hat Enterprise Linux 7	RedHat	sos-0:3.2-35.el7_2.3	*
Sosreport	Ubuntu	esm-infra-legacy/trusty	*
Sosreport	Ubuntu	trusty	*
Sosreport	Ubuntu	trusty/esm	*
Sosreport	Ubuntu	upstream	*
Sosreport	Ubuntu	vivid	*
Sosreport	Ubuntu	wily	*

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.

NVD	https://nvd.nist.gov/vuln/detail/CVE-2015-7529
CWE	https://cwe.mitre.org/data/definitions/59.html

Improper Link Resolution Before File Access ('Link Following')

Weakness

Affected Software

Potential Mitigations

References

CVE-2015-7529

Improper Link Resolution Before File Access ('Link Following')

Weakness

Affected Software

Potential Mitigations

Related Attack Patterns

References