Vulnerability Monitor

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CVE-2019-12577

A vulnerability in the London Trust Media Private Internet Access (PIA) VPN Client v82 for macOS could allow an authenticated, local attacker to run arbitrary code with elevated privileges. The macOS binary openvpn_launcher.64 is setuid root. This binary creates /tmp/pia_upscript.sh when executed. Because the file creation mask (umask) is not reset, the umask value is inherited from the calling process. This value can be manipulated to cause the privileged binary to create files with world writable permissions. A local unprivileged user can modify /tmp/pia_upscript.sh during the connect process to execute arbitrary code as the root user.

Published

2019-07-11T20:15:13.117

Last Modified

2024-11-21T04:23:07.610

Status

Modified

Source

[email protected]

Severity

CVSSv3.0: 7.8 (HIGH)

CVSSv2 Vector

AV:L/AC:L/Au:N/C:C/I:C/A:C

Access Vector: LOCAL
Access Complexity: LOW
Authentication: NONE
Confidentiality Impact: COMPLETE
Integrity Impact: COMPLETE
Availability Impact: COMPLETE

Exploitability Score

3.9

Impact Score

10.0

Weaknesses

Type: Primary
CWE-732

Affected Vendors & Products

Type	Vendor	Product	Version/Range	Vulnerable?
Application	londontrustmedia	private_internet_access_vpn_client	82	Yes
Operating System	apple	macos	-	No

References

https://github.com/mirchr/security-research/blob/master/vulnerabilities/PIA/CVE-2019-12577.txt Exploit, Third Party Advisory ([email protected])
https://github.com/mirchr/security-research/blob/master/vulnerabilities/PIA/CVE-2019-12577.txt Exploit, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)