Vulnerabilities
Misconfiguration
Runtime Security
Compliance
CVE Vulnerabilities

CVE-2009-1299

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

Published: Mar 18, 2010 | Modified: Nov 07, 2023
CVSS 3.x
N/A
Source:
NVD
CVSS 2.x
6.9 MEDIUM
AV:L/AC:M/Au:N/C:C/I:C/A:C
RedHat/V2
RedHat/V3
Ubuntu
LOW
Additional information
NVDhttps://nvd.nist.gov/vuln/detail/CVE-2009-1299
CWEhttps://cwe.mitre.org/data/definitions/59.html

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.

References

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