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Actively exploited · Published Jul 17, 2017 · Assigned by cisco

CVE-2017-6742

High 8.8 Exploited

In plain English

A high-severity memory corruption in Cisco IOS XE Software from Cisco. Attackers are actively exploiting it in the wild (listed by CISA on April 19, 2023). The chance it is exploited in the next 30 days is estimated at 21.3% (higher than 98% of all known vulnerabilities). Ready-made attack tooling exists: public proof-of-concept code. Apply updates per vendor instructions.

Severity (CVSS 3.0)8.8High
Exploit odds (30 days)21.3%top 2.4% of all CVEs
Exploited in the wildYesCISA KEV since Apr 19, 2023
Attack tooling1Public PoC

CISA guidance

Apply updates per vendor instructions.

Federal agencies must remediate by May 10, 2023.

Official description

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.

Affected products (as reported)

VendorProductVersions
Cisco Cisco IOS XE Software 3.7.0S3.7.1S3.7.2S3.7.3S3.7.4S3.7.5S3.7.6S3.7.7S
IntelliShield Universal Product N/A

Weakness: CWE-119 · Vector: CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

References