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GHSA-v8pv-4842-x354
OpenTelemetry.Resources.HostSummary
The OpenTelemetry.Resources.Host NuGet package is affected by an untrusted search path vulnerability on macOS. The host.id resource attribute detector launches the sh and ioreg executables by bare name rather than by absolute path, so both are resolved
through the PATH environment variable.
A local attacker who is less privileged than the host application, and who can influence PATH or write to a directory that appears in PATH ahead of the system directories, can have an arbitrary binary executed in the application's security context, resulting in local
code execution/privilege escalation.
Details
The implementation of the host detector macOS has always invoked ioreg and sh via their bare names since it was implemented by open-telemetry/opentelemetry-dotnet-contrib#1631.
The vulnerability was fixed by open-telemetry/opentelemetry-dotnet-contrib#4760 which executes ioreg directly using its absolute path.
Impact
Applications running on macOS that use the OpenTelemetry.Resources.Host detector when an attacker who is less privileged than the application process can influence PATH or write to a PATH directory that precedes the system directories (e.g. a higher-privileged service with a user-writable directory in its search path, or a process inheriting an attacker-influenced environment). The attacker gains code execution in the application's security context through an attacker-controlled ioreg executable.
Mitigation
This vulnerability only affect macOS hosts - Linux and Windows hosts are unaffected.
Workarounds
None known.
References
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The vulnerability requires local access to the device to be exploited. It is difficult for an attacker to exploit this vulnerability and may require special conditions. An attacker needs basic access or low-level privileges. No user interaction is needed for the attacker to exploit this vulnerability. The impact is confined to the system where the vulnerability exists. There is a high impact on the confidentiality of the information. There is a high impact on the integrity of the data. There is a high impact on the availability of the system.
Exploitation attempts have been detected. Elevated vigilance and prompt remediation are advised.
The exploit probability is very low. The vulnerability is unlikely to be exploited in the next 30 days.
We did not find any exploit available. Neither in GitHub repositories nor in the Exploit-Database.
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