CVE-2017-17740
LowSummary
W OpenLDAP w wersji do 2.4.45, gdy włączone są zarówno moduł nops, jak i nakładka memberof, występuje problem z próbą zwolnienia bufora przydzielonego na stosie. To może prowadzić do awarii serwera slapd w wyniku operacji MODDN przez zdalnych atakujących.
Risk Assessment
Atakujący mogą wykorzystać tę podatność do spowodowania awarii usługi LDAP, co może prowadzić do przerwy w dostępności usług dla użytkowników i aplikacji korzystających z LDAP.
Recommendation
Zaleca się wyłączenie modułu nops lub nakładki memberof, aby zminimalizować ryzyko wystąpienia tej podatności. Należy również rozważyć aktualizację do nowszej wersji OpenLDAP, która nie zawiera tej luki.
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Original NVD description (English source)
contrib/slapd-modules/nops/nops.c in OpenLDAP through 2.4.45, when both the nops module and the memberof overlay are enabled, attempts to free a buffer that was allocated on the stack, which allows remote attackers to cause a denial of service (slapd crash) via a member MODDN operation.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS