Resource management error in Cisco Systems, Inc products - CVE-2021-1377
Published: March 29, 2021
Vulnerability identifier: #VU51770
CSH Severity: Medium
CVSS v4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N]
CVE-ID: CVE-2021-1377
CWE-ID: CWE-399
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to Address Resolution Protocol (ARP) entries are mismanaged. A remote attacker can pass specially crafted data to the application and perform a denial of service (DoS) attack.
Affected software
Cisco 1100 Series Industrial Integrated Services Routers
Cisco Catalyst 9400 Series Switches
Cisco Catalyst 9500 Series Switches
Cisco Catalyst 9300 Series Switches
Cisco 1000 Series Integrated Services Routers
Cisco 4000 Series Integrated Services Routers
Cisco Catalyst 3650 Series Switches
Cisco Catalyst 3850 Series Switches
Cisco Cloud Services Router 1000V Series
Cisco ASR 1000 Series Aggregation Services Routers
Cisco 2600 Series Multiservice Platforms
Cisco Catalyst 9200 Series Switches
Cisco Catalyst 9600 Series Switches
Cisco Catalyst 9800 Series Wireless Controllers
Cisco IOS
Cisco IOS XE
Cisco Catalyst 9400 Series Switches
Cisco Catalyst 9500 Series Switches
Cisco Catalyst 9300 Series Switches
Cisco 1000 Series Integrated Services Routers
Cisco 4000 Series Integrated Services Routers
Cisco Catalyst 3650 Series Switches
Cisco Catalyst 3850 Series Switches
Cisco Cloud Services Router 1000V Series
Cisco ASR 1000 Series Aggregation Services Routers
Cisco 2600 Series Multiservice Platforms
Cisco Catalyst 9200 Series Switches
Cisco Catalyst 9600 Series Switches
Cisco Catalyst 9800 Series Wireless Controllers
Cisco IOS
Cisco IOS XE
How to mitigate CVE-2021-1377
Install updates from vendor's website.
Cisco IOS - addressed in versions 15.2(2)E10a, 15.2(4)E10b, 15.2(7)E4, 15.2(7.1.0p)E4, 15.2(8.0.6p)E, 15.2(8.0.13j)E, 15.5.1 SY7, 15.5.1.0.17 SY6, 15.7.3 M8, 15.8.3 M6, 15.8.3.0u M4, 15.9.3 M3, 15.9.3.0p M2, 16.3.5, 16.3.5c, 16.3.5a, 16.3.5b, 16.3.6, 16.3.7, 16.3.8, 16.3.9, 16.3.10, 16.3.11, 16.6.9, 16.7.1, 16.7.1a, 16.7.1b, 16.7.2, 16.7.3, 16.7.4, 16.8.1, 16.8.1c, 16.8.1d, 16.8.1e, 16.8.1s, 16.8.1a, 16.8.1b, 16.8.2, 16.8.3, 16.9.1, 16.9.1c, 16.9.1d, 16.9.1s, 16.9.1a, 16.9.1b, 16.9.2, 16.9.2s, 16.9.2a, 16.9.3, 16.9.3h, 16.9.3s, 16.9.3a, 16.9.4, 16.9.4c, 16.9.5, 16.9.5f, 16.9.6, 16.9.6.56, 16.9.7, 16.10.1, 16.10.1c, 16.10.1d, 16.10.1e, 16.10.1f, 16.10.1g, 16.10.1i, 16.10.1s, 16.10.1a, 16.10.1b, 16.10.2, 16.10.3, 16.11.1, 16.11.1c, 16.11.1s, 16.11.1a, 16.11.1b, 16.11.2, 16.12.1, 16.12.1c, 16.12.1s, 16.12.1t, 16.12.1w, 16.12.1x, 16.12.1y, 16.12.1z, 16.12.1a, 16.12.2, 16.12.2s, 16.12.2t, 16.12.2a, 16.12.3, 16.12.3s, 16.12.3a, 16.12.4, 16.12.4a, 16.12.4.40, 16.12.5, 16.12.5a, 17.1.1, 17.1.1s, 17.1.1t, 17.1.1a, 17.1.2, 17.1.3, 17.2.1, 17.2.1v, 17.2.1a, 17.2.1r, 17.2.1.126, 17.2.2, 17.3.1, 17.3.1w, 17.3.1x, 17.3.1a, 17.3.2, 17.3.2a, 17.3.2.1, 17.3.3, 17.3.3a, 17.4.0.145, 17.4.1, 17.4.1a, 17.4.1b, 17.5.0.40
Cisco IOS XE - addressed in versions 15.2.2 E10a, 15.2.4 E10b, 15.2.7 E4, 15.2.7.1.0p E4, 15.2.8.0.6p E, 15.2.8.0.13j E, 15.5.1 SY7, 15.5.1.0.17 SY6, 15.7.3 M8, 15.8.3 M6, 15.8.3.0u M4, 15.9.3 M3, 15.9.3.0p M2, 16.3.5, 16.3.5c, 16.3.5a, 16.3.5b, 16.3.6, 16.3.7, 16.3.8, 16.3.9, 16.3.10, 16.3.11, 16.6.9, 16.7.1, 16.7.1a, 16.7.1b, 16.7.2, 16.7.3, 16.7.4, 16.8.1, 16.8.1c, 16.8.1d, 16.8.1e, 16.8.1s, 16.8.1a, 16.8.1b, 16.8.2, 16.8.3, 16.9.1, 16.9.1c, 16.9.1d, 16.9.1s, 16.9.1a, 16.9.1b, 16.9.2, 16.9.2s, 16.9.2a, 16.9.3, 16.9.3h, 16.9.3s, 16.9.3a, 16.9.4, 16.9.4c, 16.9.5, 16.9.5f, 16.9.6, 16.9.6.56, 16.9.7, 16.10.1, 16.10.1c, 16.10.1d, 16.10.1e, 16.10.1f, 16.10.1g, 16.10.1i, 16.10.1s, 16.10.1a, 16.10.1b, 16.10.2, 16.10.3, 16.11.1, 16.11.1c, 16.11.1s, 16.11.1a, 16.11.1b, 16.11.2, 16.12.1, 16.12.1c, 16.12.1s, 16.12.1t, 16.12.1w, 16.12.1x, 16.12.1y, 16.12.1z, 16.12.1a, 16.12.2, 16.12.2s, 16.12.2t, 16.12.2a, 16.12.3, 16.12.3s, 16.12.3a, 16.12.4, 16.12.4a, 16.12.4.40, 16.12.5, 16.12.5a, 17.1.1, 17.1.1s, 17.1.1t, 17.1.1a, 17.1.2, 17.1.3, 17.2.1, 17.2.1v, 17.2.1a, 17.2.1r, 17.2.1.126, 17.2.2, 17.3.1, 17.3.1w, 17.3.1x, 17.3.1a, 17.3.2, 17.3.2a, 17.3.2.1, 17.3.3, 17.3.3a, 17.4.0.145, 17.4.1, 17.4.1a, 17.4.1b, 17.5.0.40
Cisco IOS XE - addressed in versions 15.2.2 E10a, 15.2.4 E10b, 15.2.7 E4, 15.2.7.1.0p E4, 15.2.8.0.6p E, 15.2.8.0.13j E, 15.5.1 SY7, 15.5.1.0.17 SY6, 15.7.3 M8, 15.8.3 M6, 15.8.3.0u M4, 15.9.3 M3, 15.9.3.0p M2, 16.3.5, 16.3.5c, 16.3.5a, 16.3.5b, 16.3.6, 16.3.7, 16.3.8, 16.3.9, 16.3.10, 16.3.11, 16.6.9, 16.7.1, 16.7.1a, 16.7.1b, 16.7.2, 16.7.3, 16.7.4, 16.8.1, 16.8.1c, 16.8.1d, 16.8.1e, 16.8.1s, 16.8.1a, 16.8.1b, 16.8.2, 16.8.3, 16.9.1, 16.9.1c, 16.9.1d, 16.9.1s, 16.9.1a, 16.9.1b, 16.9.2, 16.9.2s, 16.9.2a, 16.9.3, 16.9.3h, 16.9.3s, 16.9.3a, 16.9.4, 16.9.4c, 16.9.5, 16.9.5f, 16.9.6, 16.9.6.56, 16.9.7, 16.10.1, 16.10.1c, 16.10.1d, 16.10.1e, 16.10.1f, 16.10.1g, 16.10.1i, 16.10.1s, 16.10.1a, 16.10.1b, 16.10.2, 16.10.3, 16.11.1, 16.11.1c, 16.11.1s, 16.11.1a, 16.11.1b, 16.11.2, 16.12.1, 16.12.1c, 16.12.1s, 16.12.1t, 16.12.1w, 16.12.1x, 16.12.1y, 16.12.1z, 16.12.1a, 16.12.2, 16.12.2s, 16.12.2t, 16.12.2a, 16.12.3, 16.12.3s, 16.12.3a, 16.12.4, 16.12.4a, 16.12.4.40, 16.12.5, 16.12.5a, 17.1.1, 17.1.1s, 17.1.1t, 17.1.1a, 17.1.2, 17.1.3, 17.2.1, 17.2.1v, 17.2.1a, 17.2.1r, 17.2.1.126, 17.2.2, 17.3.1, 17.3.1w, 17.3.1x, 17.3.1a, 17.3.2, 17.3.2a, 17.3.2.1, 17.3.3, 17.3.3a, 17.4.0.145, 17.4.1, 17.4.1a, 17.4.1b, 17.5.0.40