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-2017-6736
HighCVSS 8.8KEVSummary
Podsystem protokołu SNMP w oprogramowaniu Cisco IOS i IOS XE zawiera wiele podatności, które mogą umożliwić uwierzytelnionemu, zdalnemu atakującemu zdalne wykonanie kodu na podatnym systemie lub spowodowanie jego ponownego uruchomienia. Atakujący może wykorzystać te podatności, wysyłając spreparowany pakiet SNMP do podatnego systemu przez IPv4 lub IPv6.
Risk Assessment
Podatności te mogą prowadzić do zdalnego wykonania kodu, co stwarza poważne zagrożenie dla integralności i dostępności systemów w organizacji. Atakujący, mając dostęp do odpowiednich danych uwierzytelniających, może przejąć kontrolę nad systemem.
Recommendation
Zaleca się aktualizację oprogramowania Cisco do najnowszej wersji, aby usunąć te podatności. Dodatkowo, należy ograniczyć dostęp do protokołu SNMP tylko do zaufanych źródeł oraz monitorować ruch SNMP w sieci.
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Original NVD description (English source)
The Simple Network Management Protocol (SNMP) subsystem of Cisco IOS and IOS XE Software contains multiple vulnerabilities that could allow an authenticated, remote attacker to remotely execute code on an affected system or cause an affected system to reload. An attacker could exploit these vulnerabilities by sending a crafted SNMP packet to an affected system via IPv4 or IPv6. Only traffic directed to an affected system can be used to exploit these vulnerabilities. The vulnerabilities are due to a buffer overflow condition in the SNMP subsystem of the affected software. The vulnerabilities affect all versions of SNMP - Versions 1, 2c, and 3. To exploit these vulnerabilities via SNMP Version 2c or earlier, the attacker must know the SNMP read-only community string for the affected system. To exploit these vulnerabilities via SNMP Version 3, the attacker must have user credentials for the affected system. A successful exploit could allow the attacker to execute arbitrary code and obtain full control of the affected system or cause the affected system to reload. Customers are advised to apply the workaround as contained in the Workarounds section below. Fixed software information is available via the Cisco IOS Software Checker. All devices that have enabled SNMP and have not explicitly excluded the affected MIBs or OIDs should be considered vulnerable. There are workarounds that address these vulnerabilities.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS

