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TI-2017-04497 Aliases CVE-2017-6742GHSA-cw5p-gwrw-rv56

Memory corruption in Cisco IOS XE Software

Priority CRITICAL 97Exploited in the wildCWE-119Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
None
Attack complexity
Low
Impact type
Code execution
Confidentiality · integrity · availability
High · High · High
Fix status
No fix listed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-119 and the CVSS impact.

Summary

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.

Why it matters now

Exploitation Active In CISA KEV since 2023-04-19CISA due date 2023-05-10
EPSS 0.21261 97th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Active
Automatable
No
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
CiscoCisco IOS XE Software3.7.0S; 3.7.1S; 3.7.2S; 3.7.3S; 3.7.4S; 3.7.5S; 3.7.6S; 3.7.7S; 3.7.4aS; 3.7.2tS; 3.7.0bS; 3.8.0S; 3.8.1S; 3.8.2S; 3.9.1S; 3.9.0S; 3.9.2S; 3.9.0aS; 3.11.1S; 3.11.2S; 3.11.0S; 3.11.3S; 3.11.4S; 3.12.0S; 3.12.1S; 3.12.2S; 3.12.3S; 3.12.0aS; 3.12.4S; 3.13.0S; 3.13.1S; 3.13.2S; 3.13.3S; 3.13.4S; 3.13.5S; 3.13.2aS; 3.13.0aS; 3.13.5aS; 3.13.6S; 3.13.7S; 3.13.6aS; 3.13.7aS; 3.6.3E; 3.6.6E; 3.6.5bE; 3.14.0S; 3.14.1S; 3.14.2S; 3.14.3S; 3.14.4S; 3.15.0S; 3.15.1S; 3.15.2S; 3.15.1cS; 3.15.3S; 3.15.4S; 3.7.4E; 3.7.5E; 3.16.0S; 3.16.1S; 3.16.1aS; 3.16.2S; 3.16.0cS; 3.16.3S; 3.16.2bS; 3.16.4aS; 3.16.4bS; 3.16.5S; 3.16.4dS; 3.17.0S; 3.17.1S; 3.17.2S; 3.17.1aS; 3.17.3S; 16.2.1; 16.2.2; 16.3.1; 16.3.2; 16.3.3; 16.3.1a; 16.3.4; 16.4.1; 16.4.2; 16.5.1; 16.5.1b; 3.18.0aS; 3.18.0S; 3.18.1S; 3.18.0SP; 3.18.1SP; 3.18.1aSP; 3.18.2aSP—No fix listedCNA
CiscoUniversal ProductN/A—No fix listedCNA
  • Cisco IOS XE Software VendorCisco Affected 3.7.0S; 3.7.1S; 3.7.2S; 3.7.3S; 3.7.4S; 3.7.5S; 3.7.6S; 3.7.7S; 3.7.4aS; 3.7.2tS; 3.7.0bS; 3.8.0S; 3.8.1S; 3.8.2S; 3.9.1S; 3.9.0S; 3.9.2S; 3.9.0aS; 3.11.1S; 3.11.2S; 3.11.0S; 3.11.3S; 3.11.4S; 3.12.0S; 3.12.1S; 3.12.2S; 3.12.3S; 3.12.0aS; 3.12.4S; 3.13.0S; 3.13.1S; 3.13.2S; 3.13.3S; 3.13.4S; 3.13.5S; 3.13.2aS; 3.13.0aS; 3.13.5aS; 3.13.6S; 3.13.7S; 3.13.6aS; 3.13.7aS; 3.6.3E; 3.6.6E; 3.6.5bE; 3.14.0S; 3.14.1S; 3.14.2S; 3.14.3S; 3.14.4S; 3.15.0S; 3.15.1S; 3.15.2S; 3.15.1cS; 3.15.3S; 3.15.4S; 3.7.4E; 3.7.5E; 3.16.0S; 3.16.1S; 3.16.1aS; 3.16.2S; 3.16.0cS; 3.16.3S; 3.16.2bS; 3.16.4aS; 3.16.4bS; 3.16.5S; 3.16.4dS; 3.17.0S; 3.17.1S; 3.17.2S; 3.17.1aS; 3.17.3S; 16.2.1; 16.2.2; 16.3.1; 16.3.2; 16.3.3; 16.3.1a; 16.3.4; 16.4.1; 16.4.2; 16.5.1; 16.5.1b; 3.18.0aS; 3.18.0S; 3.18.1S; 3.18.0SP; 3.18.1SP; 3.18.1aSP; 3.18.2aSP Fixed in — No fix listed CNA
  • Universal Product VendorCisco Affected N/A Fixed in — No fix listed CNA

CPE configurations NVD · 2

CPEVersionsRoleVendor
cpe:2.3:o:cisco:ios:*:*:*:*:*:*:*:*12.0 – 12.4; 15.0 – 15.6VulnerableCisco
cpe:2.3:o:cisco:ios_xe:*:*:*:*:*:*:*:*2.2.0 – 3.17VulnerableCisco
  • cpe:2.3:o:cisco:ios:*:*:*:*:*:*:*:* Versions 12.0 – 12.4; 15.0 – 15.6 Vulnerable ·Cisco
  • cpe:2.3:o:cisco:ios_xe:*:*:*:*:*:*:*:* Versions 2.2.0 – 3.17 Vulnerable ·Cisco

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2023-04-19 Added to CISA KEV
  2. 2026-10-02 Threatist record created from CVE-2017-6742
  3. 2026-10-03 Alias added: GHSA-cw5p-gwrw-rv56

References

Advisory 2

  • TI-2018-00138 Improper input validation in Cisco IOS and IOS XE KEVCVSS 3.1CRITICAL 9.8
  • TI-2017-09019 Improper input validation in Cisco IOS and IOS XE KEVCVSS 3.1CRITICAL 9.8
  • TI-2017-02977 Improper input validation in Cisco IOS and IOS XE Software KEVCVSS 3.1CRITICAL 9.8
  • TI-2018-00135 Memory corruption in Cisco IOS, IOS XE, and IOS XR KEVCVSS 3.1HIGH 8.8
  • TI-2017-04499 Memory corruption in Cisco IOS KEVCVSS 3.1HIGH 8.8
  • TI-2017-04498 Memory corruption in Cisco IOS KEVCVSS 3.1HIGH 8.8
See all 617 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences