CVEs / CVE-2017-6742
CVE-2017-6742: Cisco IOS and IOS XE Software SNMP Remote Code Execution Vulnerability
- Known exploited in the CISA KEV catalog since 19 Apr 2023
- high 8.8 CVSS 3.1 (NVD)
- EPSS 21.4% chance of exploitation in the next 30 days, higher than 97% of CVEs (30 Oct 2026)
- Last changed at its sources
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Summary
The Simple Network Management Protocol (SNMP) subsystem of Cisco IOS and IOS XE contains a vulnerability that could allow an authenticated, remote attacker to remotely execute code on an affected system or cause an affected system to reload.
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 and fixed versions
| Product | Affected | Fixed in |
|---|---|---|
| Cisco Cisco IOS XE Software | 3.7.0S | — |
| Cisco Cisco IOS XE Software | 3.7.1S | — |
| Cisco Cisco IOS XE Software | 3.7.2S | — |
| Cisco Cisco IOS XE Software | 3.7.3S | — |
| Cisco Cisco IOS XE Software | 3.7.4S | — |
| Cisco Cisco IOS XE Software | 3.7.5S | — |
| Cisco Cisco IOS XE Software | 3.7.6S | — |
| Cisco Cisco IOS XE Software | 3.7.7S | — |
| Cisco Cisco IOS XE Software | 3.7.4aS | — |
| Cisco Cisco IOS XE Software | 3.7.2tS | — |
| Cisco Cisco IOS XE Software | 3.7.0bS | — |
| Cisco Cisco IOS XE Software | 3.8.0S | — |
| Cisco Cisco IOS XE Software | 3.8.1S | — |
| Cisco Cisco IOS XE Software | 3.8.2S | — |
| Cisco Cisco IOS XE Software | 3.9.1S | — |
| Cisco Cisco IOS XE Software | 3.9.0S | — |
| Cisco Cisco IOS XE Software | 3.9.2S | — |
| Cisco Cisco IOS XE Software | 3.9.0aS | — |
| Cisco Cisco IOS XE Software | 3.11.1S | — |
| Cisco Cisco IOS XE Software | 3.11.2S | — |
| Cisco Cisco IOS XE Software | 3.11.0S | — |
| Cisco Cisco IOS XE Software | 3.11.3S | — |
| Cisco Cisco IOS XE Software | 3.11.4S | — |
| Cisco Cisco IOS XE Software | 3.12.0S | — |
| Cisco Cisco IOS XE Software | 3.12.1S | — |
| Cisco Cisco IOS XE Software | 3.12.2S | — |
| Cisco Cisco IOS XE Software | 3.12.3S | — |
| Cisco Cisco IOS XE Software | 3.12.0aS | — |
| Cisco Cisco IOS XE Software | 3.12.4S | — |
| Cisco Cisco IOS XE Software | 3.13.0S | — |
Exploitation
| In CISA KEV since | 19 Apr 2023 |
|---|---|
| Due date for US federal agencies | 10 May 2023 |
| Used in ransomware campaigns | Unknown |
| Required action | Apply updates per vendor instructions. |
Severity
| CVSS 3.1 | 8.8 highCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:HScored by NVD |
|---|---|
| Weakness | CWE-119 |
References
- CVE-2017-6742 on NVD
- CVE-2017-6742 in the CISA KEV catalog
- https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20170629-snmp (cited by CISA)
- https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20170629-snmp Vendor Advisory
- http://www.securityfocus.com/bid/99345 Broken Link, Third Party Advisory, VDB Entry
- http://www.securitytracker.com/id/1038808 Broken Link, Third Party Advisory, VDB Entry
- https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20170629-snmp Vendor Advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2017-6742 US Government Resource
Sources
Exploitation status from the CISA Known Exploited Vulnerabilities catalog. EPSS scores from FIRST. Descriptions, severity and references from the National Vulnerability Database. Open-source package versions from OSV (CC-BY 4.0). Text is shown as each source states it; Stackurity does not edit it. Check the vendor's advisory before acting.
This product uses data from the NVD API but is not endorsed or certified by the NVD.