Actively exploited in the wild
Cisco IOS and IOS XE Software SNMP Remote Code Execution Vulnerability
Cisco - IOS and IOS XE Software · Listed in the CISA KEV since 2022-03-03. This indicates confirmed attacks in production environments.
Required action: Apply updates per vendor instructions.
CVE-2017-6739
HighCVSS 8.8KEVSummary
Podatność w implementacji SNMP może pozwolić uwierzytelnionemu, zdalnemu atakującemu na spowodowanie przeładowania systemu lub zdalne wykonanie kodu. Atakujący może wykorzystać tę podatność, wysyłając spreparowany pakiet SNMP do podatnego urządzenia.
Risk Assessment
Ryzyko dla organizacji polega na możliwości zdalnego wykonania kodu przez atakującego, co może prowadzić do pełnej kontroli nad systemem lub jego awarii. Wymagana jest znajomość ciągu społeczności SNMP lub poświadczeń użytkownika.
Recommendation
Zaleca się ograniczenie dostępu do SNMP tylko do zaufanych źródeł oraz monitorowanie ruchu SNMP w celu wykrycia potencjalnych prób ataku. Należy również rozważyć aktualizację lub zastosowanie poprawek dla dotkniętej implementacji SNMP.
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Original NVD description (English source)
A vulnerability in the SNMP implementation of could allow an authenticated, remote attacker to cause a reload of the affected system or to remotely execute code. An attacker could exploit this vulnerability by sending a crafted SNMP packet to the affected device. The vulnerability is due to a buffer overflow in the affected code area. The vulnerability affects all versions of SNMP (versions 1, 2c, and 3). The attacker must know the SNMP read only community string (SNMP version 2c or earlier) or the user credentials (SNMPv3). An exploit could allow the attacker to execute arbitrary code and obtain full control of the system or to cause a reload of the affected system. Only traffic directed to the affected system can be used to exploit this vulnerability.