Actively exploited in the wild
GNU Bash OS Command Injection Vulnerability
GNU - GNU Bash · Listed in the CISA KEV since 2025-10-02. This indicates confirmed attacks in production environments.
Required action: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
CVE-2014-6278
HighCVSS 8.8KEVSummary
GNU Bash w wersji do 4.3 bash43-026 nieprawidłowo analizuje definicje funkcji w wartościach zmiennych środowiskowych, co pozwala zdalnym atakującym na wykonywanie dowolnych poleceń poprzez spreparowane środowisko. Przykłady obejmują wykorzystanie funkcji ForceCommand w OpenSSH sshd oraz modułów mod_cgi i mod_cgid w serwerze Apache HTTP.
Risk Assessment
Podatność ta stwarza poważne ryzyko dla organizacji, umożliwiając atakującym zdalne wykonywanie poleceń w kontekście uprawnień użytkownika, co może prowadzić do przejęcia kontroli nad systemem.
Recommendation
Zaleca się aktualizację GNU Bash do najnowszej wersji, aby usunąć tę podatność oraz monitorowanie środowisk, w których mogą występować niebezpieczne zmienne środowiskowe.
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Original NVD description (English source)
GNU Bash through 4.3 bash43-026 does not properly parse function definitions in the values of environment variables, which allows remote attackers to execute arbitrary commands via a crafted environment, as demonstrated by vectors involving the ForceCommand feature in OpenSSH sshd, the mod_cgi and mod_cgid modules in the Apache HTTP Server, scripts executed by unspecified DHCP clients, and other situations in which setting the environment occurs across a privilege boundary from Bash execution. NOTE: this vulnerability exists because of an incomplete fix for CVE-2014-6271, CVE-2014-7169, and CVE-2014-6277.