CVE-2017-6742highunder attackCWE-119

CVE-2017-6742: high-severity vulnerability in Cisco IOS XE Software

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76Vexday Risk Score

Prioritize patching. It under exploitation confirmed by CISA and has a public proof of concept.

ssvc Actcvss 8.8epss 21%
from disclosure to weapon3106 days
Published on NVDJul 17
1st PoC+3106d
CISA KEV+2102d
Action required by CISAfederal deadline: 2023-05-10

Apply updates per vendor instructions.

In short

A buffer overflow in SNMP allows an authenticated attacker to crash the system or run malicious code by sending a specially crafted SNMP message. This is serious because it gives attackers complete control over the affected device.

Technical detail

Buffer overflow vulnerability in SNMP implementation (versions 1, 2c, 3) exploitable by authenticated remote attackers via crafted SNMP packets directed to the affected system. Requires knowledge of SNMP community string (v2c/earlier) or SNMPv3 credentials; successful exploitation enables arbitrary code execution and full system compromise or denial of service via system reload.

Summary generated and translated by AI from the official description.

The full analysis of this CVE is available in Portuguese →

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.
CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Affected products
Cisco · Cisco IOS XE SoftwareIntelliShield · Universal Product
⚠ Public resources, to assess the exposure of systems you control or are authorized to test. Test only with authorization.
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