CVE Vulnerabilities

CVE-2021-1377

Published: Mar 24, 2021 | Modified: Nov 07, 2023
CVSS 3.x
5.8
MEDIUM
Source:
NVD
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:L
CVSS 2.x
5 MEDIUM
AV:N/AC:L/Au:N/C:N/I:N/A:P
RedHat/V2
RedHat/V3
Ubuntu

A vulnerability in Address Resolution Protocol (ARP) management of Cisco IOS Software and Cisco IOS XE Software could allow an unauthenticated, remote attacker to prevent an affected device from resolving ARP entries for legitimate hosts on the connected subnets. This vulnerability exists because ARP entries are mismanaged. An attacker could exploit this vulnerability by continuously sending traffic that results in incomplete ARP entries. A successful exploit could allow the attacker to cause ARP requests on the device to be unsuccessful for legitimate hosts, resulting in a denial of service (DoS) condition.

Affected Software

Name Vendor Start Version End Version
Ios Cisco 12.2(6)i1 (including) 12.2(6)i1 (including)
Ios Cisco 15.1(3)svr1 (including) 15.1(3)svr1 (including)
Ios Cisco 15.1(3)svr2 (including) 15.1(3)svr2 (including)
Ios Cisco 15.1(3)svr3 (including) 15.1(3)svr3 (including)
Ios Cisco 15.1(3)svs (including) 15.1(3)svs (including)
Ios Cisco 15.1(3)svs1 (including) 15.1(3)svs1 (including)
Ios Cisco 15.2(2)e6 (including) 15.2(2)e6 (including)
Ios Cisco 15.2(2)e7 (including) 15.2(2)e7 (including)
Ios Cisco 15.2(2)e7b (including) 15.2(2)e7b (including)
Ios Cisco 15.2(2)e8 (including) 15.2(2)e8 (including)
Ios Cisco 15.2(2)e9 (including) 15.2(2)e9 (including)
Ios Cisco 15.2(2)e9a (including) 15.2(2)e9a (including)
Ios Cisco 15.2(2)e10 (including) 15.2(2)e10 (including)
Ios Cisco 15.2(3)e5 (including) 15.2(3)e5 (including)
Ios Cisco 15.2(4)e4 (including) 15.2(4)e4 (including)
Ios Cisco 15.2(4)e5 (including) 15.2(4)e5 (including)
Ios Cisco 15.2(4)e5a (including) 15.2(4)e5a (including)
Ios Cisco 15.2(4)e6 (including) 15.2(4)e6 (including)
Ios Cisco 15.2(4)e7 (including) 15.2(4)e7 (including)
Ios Cisco 15.2(4)e8 (including) 15.2(4)e8 (including)
Ios Cisco 15.2(4)e9 (including) 15.2(4)e9 (including)
Ios Cisco 15.2(4)e10 (including) 15.2(4)e10 (including)
Ios Cisco 15.2(4)e10a (including) 15.2(4)e10a (including)
Ios Cisco 15.2(4)ea6 (including) 15.2(4)ea6 (including)
Ios Cisco 15.2(4)ea7 (including) 15.2(4)ea7 (including)
Ios Cisco 15.2(4)ea8 (including) 15.2(4)ea8 (including)
Ios Cisco 15.2(4)ea9 (including) 15.2(4)ea9 (including)
Ios Cisco 15.2(4)ea9a (including) 15.2(4)ea9a (including)
Ios Cisco 15.2(4)ea10 (including) 15.2(4)ea10 (including)
Ios Cisco 15.2(5)e1 (including) 15.2(5)e1 (including)
Ios Cisco 15.2(5)e2 (including) 15.2(5)e2 (including)
Ios Cisco 15.2(5)e2b (including) 15.2(5)e2b (including)
Ios Cisco 15.2(5)e2c (including) 15.2(5)e2c (including)
Ios Cisco 15.2(5)ex (including) 15.2(5)ex (including)
Ios Cisco 15.2(5a)e1 (including) 15.2(5a)e1 (including)
Ios Cisco 15.2(6)e (including) 15.2(6)e (including)
Ios Cisco 15.2(6)e0a (including) 15.2(6)e0a (including)
Ios Cisco 15.2(6)e0c (including) 15.2(6)e0c (including)
Ios Cisco 15.2(6)e1 (including) 15.2(6)e1 (including)
Ios Cisco 15.2(6)e1a (including) 15.2(6)e1a (including)
Ios Cisco 15.2(6)e1s (including) 15.2(6)e1s (including)
Ios Cisco 15.2(6)e2 (including) 15.2(6)e2 (including)
Ios Cisco 15.2(6)e2a (including) 15.2(6)e2a (including)
Ios Cisco 15.2(6)e2b (including) 15.2(6)e2b (including)
Ios Cisco 15.2(6)e3 (including) 15.2(6)e3 (including)
Ios Cisco 15.2(6)eb (including) 15.2(6)eb (including)
Ios Cisco 15.2(7)e (including) 15.2(7)e (including)
Ios Cisco 15.2(7)e0a (including) 15.2(7)e0a (including)
Ios Cisco 15.2(7)e0b (including) 15.2(7)e0b (including)
Ios Cisco 15.2(7)e0s (including) 15.2(7)e0s (including)
Ios Cisco 15.2(7)e1 (including) 15.2(7)e1 (including)
Ios Cisco 15.2(7)e1a (including) 15.2(7)e1a (including)
Ios Cisco 15.2(7)e2 (including) 15.2(7)e2 (including)
Ios Cisco 15.2(7)e2a (including) 15.2(7)e2a (including)
Ios Cisco 15.2(7)e2b (including) 15.2(7)e2b (including)
Ios Cisco 15.2(7)e3 (including) 15.2(7)e3 (including)
Ios Cisco 15.2(7a)e0b (including) 15.2(7a)e0b (including)
Ios Cisco 15.2(7b)e0b (including) 15.2(7b)e0b (including)
Ios Cisco 15.3(3)jpc97 (including) 15.3(3)jpc97 (including)
Ios Cisco 15.4(1)sy (including) 15.4(1)sy (including)
Ios Cisco 15.4(1)sy1 (including) 15.4(1)sy1 (including)
Ios Cisco 15.4(1)sy2 (including) 15.4(1)sy2 (including)
Ios Cisco 15.4(1)sy3 (including) 15.4(1)sy3 (including)
Ios Cisco 15.4(1)sy4 (including) 15.4(1)sy4 (including)
Ios Cisco 15.5(1)sy (including) 15.5(1)sy (including)
Ios Cisco 15.5(1)sy1 (including) 15.5(1)sy1 (including)
Ios Cisco 15.5(1)sy2 (including) 15.5(1)sy2 (including)
Ios Cisco 15.5(1)sy3 (including) 15.5(1)sy3 (including)
Ios Cisco 15.5(1)sy4 (including) 15.5(1)sy4 (including)
Ios Cisco 15.5(1)sy5 (including) 15.5(1)sy5 (including)
Ios Cisco 15.5(1)sy6 (including) 15.5(1)sy6 (including)
Ios Cisco 15.5(3)m4 (including) 15.5(3)m4 (including)
Ios Cisco 15.5(3)m4a (including) 15.5(3)m4a (including)
Ios Cisco 15.5(3)m4b (including) 15.5(3)m4b (including)
Ios Cisco 15.5(3)m4c (including) 15.5(3)m4c (including)
Ios Cisco 15.5(3)m5 (including) 15.5(3)m5 (including)
Ios Cisco 15.5(3)m6 (including) 15.5(3)m6 (including)
Ios Cisco 15.5(3)m6a (including) 15.5(3)m6a (including)
Ios Cisco 15.5(3)m7 (including) 15.5(3)m7 (including)
Ios Cisco 15.5(3)m8 (including) 15.5(3)m8 (including)
Ios Cisco 15.5(3)m9 (including) 15.5(3)m9 (including)
Ios Cisco 15.5(3)m10 (including) 15.5(3)m10 (including)
Ios Cisco 15.5(3)m11 (including) 15.5(3)m11 (including)
Ios Cisco 15.5(3)s4 (including) 15.5(3)s4 (including)
Ios Cisco 15.5(3)s5 (including) 15.5(3)s5 (including)
Ios Cisco 15.5(3)s6 (including) 15.5(3)s6 (including)
Ios Cisco 15.5(3)s6a (including) 15.5(3)s6a (including)
Ios Cisco 15.5(3)s6b (including) 15.5(3)s6b (including)
Ios Cisco 15.5(3)s7 (including) 15.5(3)s7 (including)
Ios Cisco 15.5(3)s8 (including) 15.5(3)s8 (including)
Ios Cisco 15.5(3)s9 (including) 15.5(3)s9 (including)
Ios Cisco 15.5(3)s9a (including) 15.5(3)s9a (including)
Ios Cisco 15.5(3)s10 (including) 15.5(3)s10 (including)
Ios Cisco 15.5(3)s10a (including) 15.5(3)s10a (including)
Ios Cisco 15.6(3)m2 (including) 15.6(3)m2 (including)
Ios Cisco 15.6(3)m2a (including) 15.6(3)m2a (including)
Ios Cisco 15.6(3)m3 (including) 15.6(3)m3 (including)
Ios Cisco 15.6(3)m3a (including) 15.6(3)m3a (including)
Ios Cisco 15.6(3)m4 (including) 15.6(3)m4 (including)
Ios Cisco 15.6(3)m5 (including) 15.6(3)m5 (including)
Ios Cisco 15.6(3)m6 (including) 15.6(3)m6 (including)
Ios Cisco 15.6(3)m6a (including) 15.6(3)m6a (including)
Ios Cisco 15.6(3)m6b (including) 15.6(3)m6b (including)
Ios Cisco 15.6(3)m7 (including) 15.6(3)m7 (including)
Ios Cisco 15.6(3)m8 (including) 15.6(3)m8 (including)
Ios Cisco 15.6(3)m9 (including) 15.6(3)m9 (including)
Ios Cisco 15.7(3)m (including) 15.7(3)m (including)
Ios Cisco 15.7(3)m0a (including) 15.7(3)m0a (including)
Ios Cisco 15.7(3)m1 (including) 15.7(3)m1 (including)
Ios Cisco 15.7(3)m2 (including) 15.7(3)m2 (including)
Ios Cisco 15.7(3)m3 (including) 15.7(3)m3 (including)
Ios Cisco 15.7(3)m4 (including) 15.7(3)m4 (including)
Ios Cisco 15.7(3)m4a (including) 15.7(3)m4a (including)
Ios Cisco 15.7(3)m4b (including) 15.7(3)m4b (including)
Ios Cisco 15.7(3)m5 (including) 15.7(3)m5 (including)
Ios Cisco 15.7(3)m6 (including) 15.7(3)m6 (including)
Ios Cisco 15.7(3)m7 (including) 15.7(3)m7 (including)
Ios Cisco 15.8(3)m (including) 15.8(3)m (including)
Ios Cisco 15.8(3)m0a (including) 15.8(3)m0a (including)
Ios Cisco 15.8(3)m0b (including) 15.8(3)m0b (including)
Ios Cisco 15.8(3)m1 (including) 15.8(3)m1 (including)
Ios Cisco 15.8(3)m1a (including) 15.8(3)m1a (including)
Ios Cisco 15.8(3)m2 (including) 15.8(3)m2 (including)
Ios Cisco 15.8(3)m2a (including) 15.8(3)m2a (including)
Ios Cisco 15.8(3)m3 (including) 15.8(3)m3 (including)
Ios Cisco 15.8(3)m3a (including) 15.8(3)m3a (including)
Ios Cisco 15.8(3)m3b (including) 15.8(3)m3b (including)
Ios Cisco 15.8(3)m4 (including) 15.8(3)m4 (including)
Ios Cisco 15.8(3)m5 (including) 15.8(3)m5 (including)
Ios Cisco 15.9(3)m (including) 15.9(3)m (including)
Ios Cisco 15.9(3)m0a (including) 15.9(3)m0a (including)
Ios Cisco 15.9(3)m1 (including) 15.9(3)m1 (including)
Ios Cisco 15.9(3)m2 (including) 15.9(3)m2 (including)
Ios Cisco 15.9(3)m2a (including) 15.9(3)m2a (including)
Ios_xe Cisco 3.6.6e (including) 3.6.6e (including)
Ios_xe Cisco 3.6.7ae (including) 3.6.7ae (including)
Ios_xe Cisco 3.6.7be (including) 3.6.7be (including)
Ios_xe Cisco 3.6.7e (including) 3.6.7e (including)
Ios_xe Cisco 3.6.8e (including) 3.6.8e (including)
Ios_xe Cisco 3.6.9ae (including) 3.6.9ae (including)
Ios_xe Cisco 3.6.9e (including) 3.6.9e (including)
Ios_xe Cisco 3.6.10e (including) 3.6.10e (including)
Ios_xe Cisco 3.7.5e (including) 3.7.5e (including)
Ios_xe Cisco 3.8.4e (including) 3.8.4e (including)
Ios_xe Cisco 3.8.5ae (including) 3.8.5ae (including)
Ios_xe Cisco 3.8.5e (including) 3.8.5e (including)
Ios_xe Cisco 3.8.6e (including) 3.8.6e (including)
Ios_xe Cisco 3.8.7e (including) 3.8.7e (including)
Ios_xe Cisco 3.8.8e (including) 3.8.8e (including)
Ios_xe Cisco 3.8.9e (including) 3.8.9e (including)
Ios_xe Cisco 3.8.10e (including) 3.8.10e (including)
Ios_xe Cisco 3.9.1e (including) 3.9.1e (including)
Ios_xe Cisco 3.9.2be (including) 3.9.2be (including)
Ios_xe Cisco 3.9.2e (including) 3.9.2e (including)
Ios_xe Cisco 3.10.0ce (including) 3.10.0ce (including)
Ios_xe Cisco 3.10.0e (including) 3.10.0e (including)
Ios_xe Cisco 3.10.1ae (including) 3.10.1ae (including)
Ios_xe Cisco 3.10.1e (including) 3.10.1e (including)
Ios_xe Cisco 3.10.1se (including) 3.10.1se (including)
Ios_xe Cisco 3.10.2e (including) 3.10.2e (including)
Ios_xe Cisco 3.10.3e (including) 3.10.3e (including)
Ios_xe Cisco 3.11.0e (including) 3.11.0e (including)
Ios_xe Cisco 3.11.1ae (including) 3.11.1ae (including)
Ios_xe Cisco 3.11.1e (including) 3.11.1e (including)
Ios_xe Cisco 3.11.2ae (including) 3.11.2ae (including)
Ios_xe Cisco 3.11.2e (including) 3.11.2e (including)
Ios_xe Cisco 3.11.3ae (including) 3.11.3ae (including)
Ios_xe Cisco 3.11.3e (including) 3.11.3e (including)
Ios_xe Cisco 3.16.4as (including) 3.16.4as (including)
Ios_xe Cisco 3.16.4bs (including) 3.16.4bs (including)
Ios_xe Cisco 3.16.4cs (including) 3.16.4cs (including)
Ios_xe Cisco 3.16.4ds (including) 3.16.4ds (including)
Ios_xe Cisco 3.16.4es (including) 3.16.4es (including)
Ios_xe Cisco 3.16.4gs (including) 3.16.4gs (including)
Ios_xe Cisco 3.16.4s (including) 3.16.4s (including)
Ios_xe Cisco 3.16.5as (including) 3.16.5as (including)
Ios_xe Cisco 3.16.5bs (including) 3.16.5bs (including)
Ios_xe Cisco 3.16.5s (including) 3.16.5s (including)
Ios_xe Cisco 3.16.6bs (including) 3.16.6bs (including)
Ios_xe Cisco 3.16.6s (including) 3.16.6s (including)
Ios_xe Cisco 3.16.7as (including) 3.16.7as (including)
Ios_xe Cisco 3.16.7bs (including) 3.16.7bs (including)
Ios_xe Cisco 3.16.7s (including) 3.16.7s (including)
Ios_xe Cisco 3.16.8s (including) 3.16.8s (including)
Ios_xe Cisco 3.16.9s (including) 3.16.9s (including)
Ios_xe Cisco 3.16.10as (including) 3.16.10as (including)
Ios_xe Cisco 3.16.10s (including) 3.16.10s (including)
Ios_xe Cisco 16.3.2 (including) 16.3.2 (including)
Ios_xe Cisco 16.3.3 (including) 16.3.3 (including)
Ios_xe Cisco 16.3.4 (including) 16.3.4 (including)
Ios_xe Cisco 16.3.5 (including) 16.3.5 (including)
Ios_xe Cisco 16.3.5b (including) 16.3.5b (including)
Ios_xe Cisco 16.3.6 (including) 16.3.6 (including)
Ios_xe Cisco 16.3.7 (including) 16.3.7 (including)
Ios_xe Cisco 16.3.8 (including) 16.3.8 (including)
Ios_xe Cisco 16.3.9 (including) 16.3.9 (including)
Ios_xe Cisco 16.3.10 (including) 16.3.10 (including)
Ios_xe Cisco 16.3.11 (including) 16.3.11 (including)
Ios_xe Cisco 16.4.1 (including) 16.4.1 (including)
Ios_xe Cisco 16.4.2 (including) 16.4.2 (including)
Ios_xe Cisco 16.4.3 (including) 16.4.3 (including)
Ios_xe Cisco 16.5.1 (including) 16.5.1 (including)
Ios_xe Cisco 16.5.1a (including) 16.5.1a (including)
Ios_xe Cisco 16.5.1b (including) 16.5.1b (including)
Ios_xe Cisco 16.5.2 (including) 16.5.2 (including)
Ios_xe Cisco 16.5.3 (including) 16.5.3 (including)
Ios_xe Cisco 16.6.1 (including) 16.6.1 (including)
Ios_xe Cisco 16.6.2 (including) 16.6.2 (including)
Ios_xe Cisco 16.6.3 (including) 16.6.3 (including)
Ios_xe Cisco 16.6.4 (including) 16.6.4 (including)
Ios_xe Cisco 16.6.4a (including) 16.6.4a (including)
Ios_xe Cisco 16.6.4s (including) 16.6.4s (including)
Ios_xe Cisco 16.6.5 (including) 16.6.5 (including)
Ios_xe Cisco 16.6.5a (including) 16.6.5a (including)
Ios_xe Cisco 16.6.5b (including) 16.6.5b (including)
Ios_xe Cisco 16.6.6 (including) 16.6.6 (including)
Ios_xe Cisco 16.6.7 (including) 16.6.7 (including)
Ios_xe Cisco 16.6.7a (including) 16.6.7a (including)
Ios_xe Cisco 16.6.8 (including) 16.6.8 (including)
Ios_xe Cisco 16.7.1 (including) 16.7.1 (including)
Ios_xe Cisco 16.7.1a (including) 16.7.1a (including)
Ios_xe Cisco 16.7.1b (including) 16.7.1b (including)
Ios_xe Cisco 16.7.2 (including) 16.7.2 (including)
Ios_xe Cisco 16.7.3 (including) 16.7.3 (including)
Ios_xe Cisco 16.7.4 (including) 16.7.4 (including)
Ios_xe Cisco 16.8.1 (including) 16.8.1 (including)
Ios_xe Cisco 16.8.1a (including) 16.8.1a (including)
Ios_xe Cisco 16.8.1b (including) 16.8.1b (including)
Ios_xe Cisco 16.8.1c (including) 16.8.1c (including)
Ios_xe Cisco 16.8.1d (including) 16.8.1d (including)
Ios_xe Cisco 16.8.1e (including) 16.8.1e (including)
Ios_xe Cisco 16.8.1s (including) 16.8.1s (including)
Ios_xe Cisco 16.8.2 (including) 16.8.2 (including)
Ios_xe Cisco 16.8.3 (including) 16.8.3 (including)
Ios_xe Cisco 16.9.1 (including) 16.9.1 (including)
Ios_xe Cisco 16.9.1a (including) 16.9.1a (including)
Ios_xe Cisco 16.9.1b (including) 16.9.1b (including)
Ios_xe Cisco 16.9.1c (including) 16.9.1c (including)
Ios_xe Cisco 16.9.1d (including) 16.9.1d (including)
Ios_xe Cisco 16.9.1s (including) 16.9.1s (including)
Ios_xe Cisco 16.9.2 (including) 16.9.2 (including)
Ios_xe Cisco 16.9.2a (including) 16.9.2a (including)
Ios_xe Cisco 16.9.2s (including) 16.9.2s (including)
Ios_xe Cisco 16.9.3 (including) 16.9.3 (including)
Ios_xe Cisco 16.9.3a (including) 16.9.3a (including)
Ios_xe Cisco 16.9.3h (including) 16.9.3h (including)
Ios_xe Cisco 16.9.3s (including) 16.9.3s (including)
Ios_xe Cisco 16.9.4 (including) 16.9.4 (including)
Ios_xe Cisco 16.9.4c (including) 16.9.4c (including)
Ios_xe Cisco 16.9.5 (including) 16.9.5 (including)
Ios_xe Cisco 16.9.5f (including) 16.9.5f (including)
Ios_xe Cisco 16.9.6 (including) 16.9.6 (including)
Ios_xe Cisco 16.10.1 (including) 16.10.1 (including)
Ios_xe Cisco 16.10.1a (including) 16.10.1a (including)
Ios_xe Cisco 16.10.1b (including) 16.10.1b (including)
Ios_xe Cisco 16.10.1c (including) 16.10.1c (including)
Ios_xe Cisco 16.10.1d (including) 16.10.1d (including)
Ios_xe Cisco 16.10.1e (including) 16.10.1e (including)
Ios_xe Cisco 16.10.1f (including) 16.10.1f (including)
Ios_xe Cisco 16.10.1g (including) 16.10.1g (including)
Ios_xe Cisco 16.10.1s (including) 16.10.1s (including)
Ios_xe Cisco 16.10.2 (including) 16.10.2 (including)
Ios_xe Cisco 16.10.3 (including) 16.10.3 (including)
Ios_xe Cisco 16.11.1 (including) 16.11.1 (including)
Ios_xe Cisco 16.11.1a (including) 16.11.1a (including)
Ios_xe Cisco 16.11.1b (including) 16.11.1b (including)
Ios_xe Cisco 16.11.1c (including) 16.11.1c (including)
Ios_xe Cisco 16.11.1s (including) 16.11.1s (including)
Ios_xe Cisco 16.11.2 (including) 16.11.2 (including)
Ios_xe Cisco 16.12.1 (including) 16.12.1 (including)
Ios_xe Cisco 16.12.1a (including) 16.12.1a (including)
Ios_xe Cisco 16.12.1c (including) 16.12.1c (including)
Ios_xe Cisco 16.12.1s (including) 16.12.1s (including)
Ios_xe Cisco 16.12.1t (including) 16.12.1t (including)
Ios_xe Cisco 16.12.1w (including) 16.12.1w (including)
Ios_xe Cisco 16.12.1x (including) 16.12.1x (including)
Ios_xe Cisco 16.12.1y (including) 16.12.1y (including)
Ios_xe Cisco 16.12.1z (including) 16.12.1z (including)
Ios_xe Cisco 16.12.2 (including) 16.12.2 (including)
Ios_xe Cisco 16.12.2a (including) 16.12.2a (including)
Ios_xe Cisco 16.12.2s (including) 16.12.2s (including)
Ios_xe Cisco 16.12.2t (including) 16.12.2t (including)
Ios_xe Cisco 16.12.3 (including) 16.12.3 (including)
Ios_xe Cisco 16.12.3a (including) 16.12.3a (including)
Ios_xe Cisco 16.12.3s (including) 16.12.3s (including)
Ios_xe Cisco 16.12.4 (including) 16.12.4 (including)
Ios_xe Cisco 16.12.4a (including) 16.12.4a (including)
Ios_xe Cisco 17.1.1 (including) 17.1.1 (including)
Ios_xe Cisco 17.1.1a (including) 17.1.1a (including)
Ios_xe Cisco 17.1.1s (including) 17.1.1s (including)
Ios_xe Cisco 17.1.1t (including) 17.1.1t (including)
Ios_xe Cisco 17.1.2 (including) 17.1.2 (including)
Ios_xe Cisco 17.2.1 (including) 17.2.1 (including)
Ios_xe Cisco 17.2.1a (including) 17.2.1a (including)
Ios_xe Cisco 17.2.1r (including) 17.2.1r (including)
Ios_xe Cisco 17.2.1v (including) 17.2.1v (including)
Ios_xe Cisco 17.2.2 (including) 17.2.2 (including)
Ios_xe Cisco 17.3.1 (including) 17.3.1 (including)
Ios_xe Cisco 17.3.1a (including) 17.3.1a (including)
Ios_xe Cisco 17.3.1w (including) 17.3.1w (including)
Ios_xe Cisco 17.3.2 (including) 17.3.2 (including)
Ios_xe Cisco 17.3.2a (including) 17.3.2a (including)

References