CVE-2009-3623
HighSummary
Funkcja lookup_cb_cred w subsystemie nfsd4 jądra Linux przed wersją 2.6.31.2 próbuje uzyskać dostęp do pamięci podręcznej poświadczeń, nawet gdy klient określa typ uwierzytelnienia AUTH_NULL. To może prowadzić do awarii systemu w wyniku dereferencji wskaźnika NULL.
Risk Assessment
Atakujący zdalnie mogą spowodować awarię systemu, co prowadzi do odmowy usługi. Tego typu podatność może wpłynąć na dostępność usług NFS w organizacji.
Recommendation
Zaleca się aktualizację jądra Linux do wersji 2.6.31.2 lub nowszej, aby usunąć tę podatność i zabezpieczyć system przed potencjalnymi atakami.
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Original NVD description (English source)
The lookup_cb_cred function in fs/nfsd/nfs4callback.c in the nfsd4 subsystem in the Linux kernel before 2.6.31.2 attempts to access a credentials cache even when a client specifies the AUTH_NULL authentication flavor, which allows remote attackers to cause a denial of service (NULL pointer dereference and system crash) via an NFSv4 mount request.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS

