pam_usb provides hardware authentication for Linux using removable media. In versions prior to 0.9.2, getenv() environment variables XRDP_SESSION, DISPLAY and TMUX allow environment variable injection into local-check logic. These environment variables influence whether a current session is local or remote, and a PAM module that runs in the context of setuid binaries (sudo, su), getenv() returns attacker-controlled values whenever the process environment has been manipulated by a local user. This issue has been fixed in version 0.9.2.
Advisories
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Fixes
Solution
No solution given by the vendor.
Workaround
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References
History
Thu, 18 Jun 2026 21:30:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| First Time appeared |
Mcdope
Mcdope pam Usb |
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| Vendors & Products |
Mcdope
Mcdope pam Usb |
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| Metrics |
ssvc
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Thu, 18 Jun 2026 19:45:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Description | pam_usb provides hardware authentication for Linux using removable media. In versions prior to 0.9.2, getenv() environment variables XRDP_SESSION, DISPLAY and TMUX allow environment variable injection into local-check logic. These environment variables influence whether a current session is local or remote, and a PAM module that runs in the context of setuid binaries (sudo, su), getenv() returns attacker-controlled values whenever the process environment has been manipulated by a local user. This issue has been fixed in version 0.9.2. | |
| Title | pam_usb: getenv() used in PAM context allows environment variable injection into local-check logic | |
| Weaknesses | CWE-454 CWE-807 |
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| References |
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| Metrics |
cvssV3_1
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Projects
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Status: PUBLISHED
Assigner: GitHub_M
Published:
Updated: 2026-06-18T20:25:31.988Z
Reserved: 2026-05-26T23:26:07.974Z
Link: CVE-2026-48980
Updated: 2026-06-18T20:25:26.727Z
No data.
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OpenCVE Enrichment
Updated: 2026-06-18T21:30:16Z