CVE-2020-15590

HIGH
7.5
CVSS Score
Published: September 14, 2020 at 09:11 PM UTC
Updated: June 17, 2026 at 02:56 AM UTC
1 product affected across 1 vendorPrivate Internet Access VPN Client

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Severity
HIGH7.5
Exploit prediction
EPSS 3%

Description

A vulnerability in the Private Internet Access (PIA) VPN Client for Linux 1.5 through 2.3+ allows remote attackers to bypass an intended VPN kill switch mechanism and read sensitive information via intercepting network traffic. Since 1.5, PIA has supported a “split tunnel” OpenVPN bypass option. The PIA killswitch & associated iptables firewall is designed to protect you while using the Internet. When the kill switch is configured to block all inbound and outbound network traffic, privileged applications can continue sending & receiving network traffic if net.ipv4.ip_forward has been enabled in the system kernel parameters. For example, a Docker container running on a host with the VPN turned off, and the kill switch turned on, can continue using the internet, leaking the host IP (CWE 200). In PIA 2.4.0+, policy-based routing is enabled by default and is used to direct all forwarded packets to the VPN interface automatically.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

1.5.0 ≤ v < 2.4.0
Affected range stops below 2.4.0, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

References (3)

x_refsource_MISCNot Applicable
https://github.com/sickcodes
x_refsource_MISCExploitMitigationThird Party Advisory
https://sick.codes/cve-2020-15590/

CVSS

Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
NONE
Availability
NONE
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-863

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