CVE-2009-1299

The pa_make_secure_dir function in core-util.c in PulseAudio 0.9.10 and 0.9.19 allows local users to change the ownership and permissions of arbitrary files via a symlink attack on a /tmp/.esd-##### 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

Name	Vendor	Start Version	End Version
Pulseaudio	Pulseaudio	0.9.10 (including)	0.9.10 (including)
Pulseaudio	Pulseaudio	0.9.19 (including)	0.9.19 (including)
Pulseaudio	Ubuntu	hardy	*
Pulseaudio	Ubuntu	intrepid	*
Pulseaudio	Ubuntu	jaunty	*
Pulseaudio	Ubuntu	karmic	*
Pulseaudio	Ubuntu	lucid	*
Pulseaudio	Ubuntu	upstream	*

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-2009-1299
CWE	https://cwe.mitre.org/data/definitions/59.html

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

Weakness

Affected Software

Potential Mitigations

References

CVE-2009-1299

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

Weakness

Affected Software

Potential Mitigations

Related Attack Patterns

References