CVE-2026-44709
HighCVSS 7.8Summary
pam_usb zapewnia uwierzytelnianie sprzętowe dla systemu Linux przy użyciu zwykłych nośników wymiennych. W wersjach przed 0.8.7, pamusb-pinentry odczytuje zmienną środowiskową PINENTRY_FALLBACK_APP i wykonuje ją bez żadnej walidacji, co pozwala na uruchomienie dowolnego binarnego pliku lub skryptu.
Risk Assessment
Każdy proces, który może ustawić zmienne środowiskowe przed wywołaniem pamusb-pinentry, może wskazać na dowolny plik wykonywalny, co stwarza ryzyko wykonania złośliwego kodu z uprawnieniami narzędzi pam_usb. To może prowadzić do nieautoryzowanego dostępu lub przejęcia kontroli nad systemem.
Recommendation
Zaleca się aktualizację do wersji 0.8.7 lub nowszej, aby usunąć tę podatność. Dodatkowo, należy ograniczyć możliwość ustawiania zmiennych środowiskowych przez nieautoryzowane procesy.
Related vulnerabilities
- CVE-2026-82533Critical
DeepSeek Harness before 0.1.2-alpha.1 contains an authentication bypass vulnerability in its local HTTP control-plane API that allows attackers to gain full agent control by supplying a spoofed Host header, as the server validates only the client-supplied Host header value rather than the actual TCP connection origin.
- CVE-2026-26084Critical
An improper access control vulnerability in Fortinet FortiSandbox versions 5.0.0 through 5.0.5, 4.4.0 through 4.4.8, Cloud 5.0.4 through 5.0.5, and PaaS 5.0.4 through 5.0.5 may allow an attacker to access sensitive information via crafted HTTP requests.
- CVE-2026-79576Critical
An issue in the Single-Sign On (SSO) component of Digital-Infrastructure v9.6.7 allows attackers to authenticate as any user, including the Admin, without a password.
- CVE-2026-61516Critical
Netis NX10 firmware versions V4.0.1.5808 and V3.0.0.4142 contain an information disclosure vulnerability that allows unauthenticated attackers to retrieve the administrator password by sending a request to the sysinfo action in the web management interface without a valid session.
- CVE-2026-12745Critical
A deserialization of untrusted data vulnerability in Ivanti Neurons for ITSM before 2026.2 allows a remote unauthenticated attacker to execute arbitrary code on the server.
- CVE-2026-12744Critical
A deserialization of untrusted data vulnerability in Ivanti Neurons for ITSM before 2026.2 allows a remote unauthenticated attacker to execute arbitrary code on the server.
- CVE-2026-12650Critical
A deserialization of untrusted data vulnerability in Ivanti Neurons for ITSM before 2026.2 allows a remote authenticated attacker to execute arbitrary code on the server.
- CVE-2026-12647Critical
A Missing Authorization vulnerability in Ivanti Neurons for ITSM before 2026.2 allows a remote authenticated attacker to execute arbitrary code on the server.
- CVE-2026-12646Critical
A Missing Authorization vulnerability in Ivanti Neurons for ITSM before 2026.2 allows a remote authenticated attacker to execute arbitrary code on the server.
- CVE-2026-12645Critical
A Missing Authorization vulnerability in Ivanti Neurons for ITSM before 2026.2 allows a remote authenticated attacker to execute arbitrary code on the server.
Original NVD description (English source)
pam_usb provides hardware authentication for Linux using ordinary removable media. Prior to 0.8.7, pamusb-pinentry reads the PINENTRY_FALLBACK_APP environment variable and executes it directly without any validation. Any process that can set environment variables before pamusb-pinentry is invoked can point PINENTRY_FALLBACK_APP at an arbitrary binary or script and have it executed with the privileges of the pam_usb tool chain. This vulnerability is fixed in 0.8.7.