CVEs / CVE-2017-6737
CVE-2017-6737: Cisco IOS and IOS XE Software SNMP Remote Code Execution Vulnerability
- Known exploited in the CISA KEV catalog since 3 Mar 2022
- high 8.8 CVSS 3.1 (NVD)
- EPSS 44.9% chance of exploitation in the next 30 days, higher than 98% 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.
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 IOS | 12.1(3)XI | — |
| Cisco IOS | 12.2(4)B | — |
| Cisco IOS | 12.2(15)B | — |
| Cisco IOS | 12.2(16)B1 | — |
| Cisco IOS | 12.2(4)B7 | — |
| Cisco IOS | 12.2(4)B2 | — |
| Cisco IOS | 12.2(16)B2 | — |
| Cisco IOS | 12.2(4)B6 | — |
| Cisco IOS | 12.2(4)B1 | — |
| Cisco IOS | 12.2(4)B4 | — |
| Cisco IOS | 12.2(4)B3 | — |
| Cisco IOS | 12.2(4)B8 | — |
| Cisco IOS | 12.2(4)B5 | — |
| Cisco IOS | 12.2(16)B | — |
| Cisco IOS | 12.2(2)XA | — |
| Cisco IOS | 12.2(2)XA2 | — |
| Cisco IOS | 12.2(2)XA3 | — |
| Cisco IOS | 12.2(2)XA4 | — |
| Cisco IOS | 12.2(2)XA5 | — |
| Cisco IOS | 12.2(2)XA1 | — |
| Cisco IOS | 12.2(2)XB11 | — |
| Cisco IOS | 12.2(2)XB5 | — |
| Cisco IOS | 12.2(2)XB2 | — |
| Cisco IOS | 12.2(2)XB1 | — |
| Cisco IOS | 12.2(2)XB10 | — |
| Cisco IOS | 12.2(2)XB7 | — |
| Cisco IOS | 12.2(2)XB3 | — |
| Cisco IOS | 12.2(2)XB6 | — |
| Cisco IOS | 12.2(2)XB14 | — |
| Cisco IOS | 12.2(2)XB12 | — |
Exploitation
| In CISA KEV since | 3 Mar 2022 |
|---|---|
| Due date for US federal agencies | 24 Mar 2022 |
| 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-2017-6737 on NVD
- CVE-2017-6737 in the CISA KEV catalog
- 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-2017-6737 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.