PT-2023-33066 · Birdcage · Birdcage
Published
2023-12-01
·
Updated
2023-12-01
CVSS v3.1
4.0
Medium
| Vector | AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N |
Name of the Vulnerable Software and Affected Versions
birdcage (affected versions not specified)
Description
The issue allows environment variables to be read from procfs unless a new process is started. This can be demonstrated through a proof of concept that shows how a secret environment variable can be accessed. The estimated number of potentially affected devices worldwide is not available. There is no information about real-world incidents where this issue was exploited. Technical details about exploitation include the use of the
/proc/self/environ endpoint to read environment variables, and the environ variable is used to store the contents of this file. The env::var os function is used to check if a secret environment variable is set.Recommendations
As a temporary workaround, consider modifying birdcage's API to always spawn a new process when creating a new command, and utilizing ptrace isolation to reinforce guarantees. Additionally, using an additional PID namespace could further reinforce these guarantees.
At the moment, there is no information about a newer version that contains a fix for this vulnerability.
Information Disclosure
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Weakness Enumeration
Related Identifiers
Affected Products
Birdcage