CVE Vulnerabilities

CVE-2021-1377

Published: Mar 24, 2021 | Modified: Nov 21, 2024
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
root.io logo minimus.io logo echo.ai logo

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

NameVendorStart VersionEnd Version
IosCisco12.2(6)i1 (including)12.2(6)i1 (including)
IosCisco15.1(3)svr1 (including)15.1(3)svr1 (including)
IosCisco15.1(3)svr2 (including)15.1(3)svr2 (including)
IosCisco15.1(3)svr3 (including)15.1(3)svr3 (including)
IosCisco15.1(3)svs (including)15.1(3)svs (including)
IosCisco15.1(3)svs1 (including)15.1(3)svs1 (including)
IosCisco15.2(2)e6 (including)15.2(2)e6 (including)
IosCisco15.2(2)e7 (including)15.2(2)e7 (including)
IosCisco15.2(2)e7b (including)15.2(2)e7b (including)
IosCisco15.2(2)e8 (including)15.2(2)e8 (including)
IosCisco15.2(2)e9 (including)15.2(2)e9 (including)
IosCisco15.2(2)e9a (including)15.2(2)e9a (including)
IosCisco15.2(2)e10 (including)15.2(2)e10 (including)
IosCisco15.2(3)e5 (including)15.2(3)e5 (including)
IosCisco15.2(4)e4 (including)15.2(4)e4 (including)
IosCisco15.2(4)e5 (including)15.2(4)e5 (including)
IosCisco15.2(4)e5a (including)15.2(4)e5a (including)
IosCisco15.2(4)e6 (including)15.2(4)e6 (including)
IosCisco15.2(4)e7 (including)15.2(4)e7 (including)
IosCisco15.2(4)e8 (including)15.2(4)e8 (including)
IosCisco15.2(4)e9 (including)15.2(4)e9 (including)
IosCisco15.2(4)e10 (including)15.2(4)e10 (including)
IosCisco15.2(4)e10a (including)15.2(4)e10a (including)
IosCisco15.2(4)ea6 (including)15.2(4)ea6 (including)
IosCisco15.2(4)ea7 (including)15.2(4)ea7 (including)
IosCisco15.2(4)ea8 (including)15.2(4)ea8 (including)
IosCisco15.2(4)ea9 (including)15.2(4)ea9 (including)
IosCisco15.2(4)ea9a (including)15.2(4)ea9a (including)
IosCisco15.2(4)ea10 (including)15.2(4)ea10 (including)
IosCisco15.2(5)e1 (including)15.2(5)e1 (including)
IosCisco15.2(5)e2 (including)15.2(5)e2 (including)
IosCisco15.2(5)e2b (including)15.2(5)e2b (including)
IosCisco15.2(5)e2c (including)15.2(5)e2c (including)
IosCisco15.2(5)ex (including)15.2(5)ex (including)
IosCisco15.2(5a)e1 (including)15.2(5a)e1 (including)
IosCisco15.2(6)e (including)15.2(6)e (including)
IosCisco15.2(6)e0a (including)15.2(6)e0a (including)
IosCisco15.2(6)e0c (including)15.2(6)e0c (including)
IosCisco15.2(6)e1 (including)15.2(6)e1 (including)
IosCisco15.2(6)e1a (including)15.2(6)e1a (including)
IosCisco15.2(6)e1s (including)15.2(6)e1s (including)
IosCisco15.2(6)e2 (including)15.2(6)e2 (including)
IosCisco15.2(6)e2a (including)15.2(6)e2a (including)
IosCisco15.2(6)e2b (including)15.2(6)e2b (including)
IosCisco15.2(6)e3 (including)15.2(6)e3 (including)
IosCisco15.2(6)eb (including)15.2(6)eb (including)
IosCisco15.2(7)e (including)15.2(7)e (including)
IosCisco15.2(7)e0a (including)15.2(7)e0a (including)
IosCisco15.2(7)e0b (including)15.2(7)e0b (including)
IosCisco15.2(7)e0s (including)15.2(7)e0s (including)
IosCisco15.2(7)e1 (including)15.2(7)e1 (including)
IosCisco15.2(7)e1a (including)15.2(7)e1a (including)
IosCisco15.2(7)e2 (including)15.2(7)e2 (including)
IosCisco15.2(7)e2a (including)15.2(7)e2a (including)
IosCisco15.2(7)e2b (including)15.2(7)e2b (including)
IosCisco15.2(7)e3 (including)15.2(7)e3 (including)
IosCisco15.2(7a)e0b (including)15.2(7a)e0b (including)
IosCisco15.2(7b)e0b (including)15.2(7b)e0b (including)
IosCisco15.3(3)jpc97 (including)15.3(3)jpc97 (including)
IosCisco15.4(1)sy (including)15.4(1)sy (including)
IosCisco15.4(1)sy1 (including)15.4(1)sy1 (including)
IosCisco15.4(1)sy2 (including)15.4(1)sy2 (including)
IosCisco15.4(1)sy3 (including)15.4(1)sy3 (including)
IosCisco15.4(1)sy4 (including)15.4(1)sy4 (including)
IosCisco15.5(1)sy (including)15.5(1)sy (including)
IosCisco15.5(1)sy1 (including)15.5(1)sy1 (including)
IosCisco15.5(1)sy2 (including)15.5(1)sy2 (including)
IosCisco15.5(1)sy3 (including)15.5(1)sy3 (including)
IosCisco15.5(1)sy4 (including)15.5(1)sy4 (including)
IosCisco15.5(1)sy5 (including)15.5(1)sy5 (including)
IosCisco15.5(1)sy6 (including)15.5(1)sy6 (including)
IosCisco15.5(3)m4 (including)15.5(3)m4 (including)
IosCisco15.5(3)m4a (including)15.5(3)m4a (including)
IosCisco15.5(3)m4b (including)15.5(3)m4b (including)
IosCisco15.5(3)m4c (including)15.5(3)m4c (including)
IosCisco15.5(3)m5 (including)15.5(3)m5 (including)
IosCisco15.5(3)m6 (including)15.5(3)m6 (including)
IosCisco15.5(3)m6a (including)15.5(3)m6a (including)
IosCisco15.5(3)m7 (including)15.5(3)m7 (including)
IosCisco15.5(3)m8 (including)15.5(3)m8 (including)
IosCisco15.5(3)m9 (including)15.5(3)m9 (including)
IosCisco15.5(3)m10 (including)15.5(3)m10 (including)
IosCisco15.5(3)m11 (including)15.5(3)m11 (including)
IosCisco15.5(3)s4 (including)15.5(3)s4 (including)
IosCisco15.5(3)s5 (including)15.5(3)s5 (including)
IosCisco15.5(3)s6 (including)15.5(3)s6 (including)
IosCisco15.5(3)s6a (including)15.5(3)s6a (including)
IosCisco15.5(3)s6b (including)15.5(3)s6b (including)
IosCisco15.5(3)s7 (including)15.5(3)s7 (including)
IosCisco15.5(3)s8 (including)15.5(3)s8 (including)
IosCisco15.5(3)s9 (including)15.5(3)s9 (including)
IosCisco15.5(3)s9a (including)15.5(3)s9a (including)
IosCisco15.5(3)s10 (including)15.5(3)s10 (including)
IosCisco15.5(3)s10a (including)15.5(3)s10a (including)
IosCisco15.6(3)m2 (including)15.6(3)m2 (including)
IosCisco15.6(3)m2a (including)15.6(3)m2a (including)
IosCisco15.6(3)m3 (including)15.6(3)m3 (including)
IosCisco15.6(3)m3a (including)15.6(3)m3a (including)
IosCisco15.6(3)m4 (including)15.6(3)m4 (including)
IosCisco15.6(3)m5 (including)15.6(3)m5 (including)
IosCisco15.6(3)m6 (including)15.6(3)m6 (including)
IosCisco15.6(3)m6a (including)15.6(3)m6a (including)
IosCisco15.6(3)m6b (including)15.6(3)m6b (including)
IosCisco15.6(3)m7 (including)15.6(3)m7 (including)
IosCisco15.6(3)m8 (including)15.6(3)m8 (including)
IosCisco15.6(3)m9 (including)15.6(3)m9 (including)
IosCisco15.7(3)m (including)15.7(3)m (including)
IosCisco15.7(3)m0a (including)15.7(3)m0a (including)
IosCisco15.7(3)m1 (including)15.7(3)m1 (including)
IosCisco15.7(3)m2 (including)15.7(3)m2 (including)
IosCisco15.7(3)m3 (including)15.7(3)m3 (including)
IosCisco15.7(3)m4 (including)15.7(3)m4 (including)
IosCisco15.7(3)m4a (including)15.7(3)m4a (including)
IosCisco15.7(3)m4b (including)15.7(3)m4b (including)
IosCisco15.7(3)m5 (including)15.7(3)m5 (including)
IosCisco15.7(3)m6 (including)15.7(3)m6 (including)
IosCisco15.7(3)m7 (including)15.7(3)m7 (including)
IosCisco15.8(3)m (including)15.8(3)m (including)
IosCisco15.8(3)m0a (including)15.8(3)m0a (including)
IosCisco15.8(3)m0b (including)15.8(3)m0b (including)
IosCisco15.8(3)m1 (including)15.8(3)m1 (including)
IosCisco15.8(3)m1a (including)15.8(3)m1a (including)
IosCisco15.8(3)m2 (including)15.8(3)m2 (including)
IosCisco15.8(3)m2a (including)15.8(3)m2a (including)
IosCisco15.8(3)m3 (including)15.8(3)m3 (including)
IosCisco15.8(3)m3a (including)15.8(3)m3a (including)
IosCisco15.8(3)m3b (including)15.8(3)m3b (including)
IosCisco15.8(3)m4 (including)15.8(3)m4 (including)
IosCisco15.8(3)m5 (including)15.8(3)m5 (including)
IosCisco15.9(3)m (including)15.9(3)m (including)
IosCisco15.9(3)m0a (including)15.9(3)m0a (including)
IosCisco15.9(3)m1 (including)15.9(3)m1 (including)
IosCisco15.9(3)m2 (including)15.9(3)m2 (including)
IosCisco15.9(3)m2a (including)15.9(3)m2a (including)
Ios_xeCisco3.6.6e (including)3.6.6e (including)
Ios_xeCisco3.6.7ae (including)3.6.7ae (including)
Ios_xeCisco3.6.7be (including)3.6.7be (including)
Ios_xeCisco3.6.7e (including)3.6.7e (including)
Ios_xeCisco3.6.8e (including)3.6.8e (including)
Ios_xeCisco3.6.9ae (including)3.6.9ae (including)
Ios_xeCisco3.6.9e (including)3.6.9e (including)
Ios_xeCisco3.6.10e (including)3.6.10e (including)
Ios_xeCisco3.7.5e (including)3.7.5e (including)
Ios_xeCisco3.8.4e (including)3.8.4e (including)
Ios_xeCisco3.8.5ae (including)3.8.5ae (including)
Ios_xeCisco3.8.5e (including)3.8.5e (including)
Ios_xeCisco3.8.6e (including)3.8.6e (including)
Ios_xeCisco3.8.7e (including)3.8.7e (including)
Ios_xeCisco3.8.8e (including)3.8.8e (including)
Ios_xeCisco3.8.9e (including)3.8.9e (including)
Ios_xeCisco3.8.10e (including)3.8.10e (including)
Ios_xeCisco3.9.1e (including)3.9.1e (including)
Ios_xeCisco3.9.2be (including)3.9.2be (including)
Ios_xeCisco3.9.2e (including)3.9.2e (including)
Ios_xeCisco3.10.0ce (including)3.10.0ce (including)
Ios_xeCisco3.10.0e (including)3.10.0e (including)
Ios_xeCisco3.10.1ae (including)3.10.1ae (including)
Ios_xeCisco3.10.1e (including)3.10.1e (including)
Ios_xeCisco3.10.1se (including)3.10.1se (including)
Ios_xeCisco3.10.2e (including)3.10.2e (including)
Ios_xeCisco3.10.3e (including)3.10.3e (including)
Ios_xeCisco3.11.0e (including)3.11.0e (including)
Ios_xeCisco3.11.1ae (including)3.11.1ae (including)
Ios_xeCisco3.11.1e (including)3.11.1e (including)
Ios_xeCisco3.11.2ae (including)3.11.2ae (including)
Ios_xeCisco3.11.2e (including)3.11.2e (including)
Ios_xeCisco3.11.3ae (including)3.11.3ae (including)
Ios_xeCisco3.11.3e (including)3.11.3e (including)
Ios_xeCisco3.16.4as (including)3.16.4as (including)
Ios_xeCisco3.16.4bs (including)3.16.4bs (including)
Ios_xeCisco3.16.4cs (including)3.16.4cs (including)
Ios_xeCisco3.16.4ds (including)3.16.4ds (including)
Ios_xeCisco3.16.4es (including)3.16.4es (including)
Ios_xeCisco3.16.4gs (including)3.16.4gs (including)
Ios_xeCisco3.16.4s (including)3.16.4s (including)
Ios_xeCisco3.16.5as (including)3.16.5as (including)
Ios_xeCisco3.16.5bs (including)3.16.5bs (including)
Ios_xeCisco3.16.5s (including)3.16.5s (including)
Ios_xeCisco3.16.6bs (including)3.16.6bs (including)
Ios_xeCisco3.16.6s (including)3.16.6s (including)
Ios_xeCisco3.16.7as (including)3.16.7as (including)
Ios_xeCisco3.16.7bs (including)3.16.7bs (including)
Ios_xeCisco3.16.7s (including)3.16.7s (including)
Ios_xeCisco3.16.8s (including)3.16.8s (including)
Ios_xeCisco3.16.9s (including)3.16.9s (including)
Ios_xeCisco3.16.10as (including)3.16.10as (including)
Ios_xeCisco3.16.10s (including)3.16.10s (including)
Ios_xeCisco16.3.2 (including)16.3.2 (including)
Ios_xeCisco16.3.3 (including)16.3.3 (including)
Ios_xeCisco16.3.4 (including)16.3.4 (including)
Ios_xeCisco16.3.5 (including)16.3.5 (including)
Ios_xeCisco16.3.5b (including)16.3.5b (including)
Ios_xeCisco16.3.6 (including)16.3.6 (including)
Ios_xeCisco16.3.7 (including)16.3.7 (including)
Ios_xeCisco16.3.8 (including)16.3.8 (including)
Ios_xeCisco16.3.9 (including)16.3.9 (including)
Ios_xeCisco16.3.10 (including)16.3.10 (including)
Ios_xeCisco16.3.11 (including)16.3.11 (including)
Ios_xeCisco16.4.1 (including)16.4.1 (including)
Ios_xeCisco16.4.2 (including)16.4.2 (including)
Ios_xeCisco16.4.3 (including)16.4.3 (including)
Ios_xeCisco16.5.1 (including)16.5.1 (including)
Ios_xeCisco16.5.1a (including)16.5.1a (including)
Ios_xeCisco16.5.1b (including)16.5.1b (including)
Ios_xeCisco16.5.2 (including)16.5.2 (including)
Ios_xeCisco16.5.3 (including)16.5.3 (including)
Ios_xeCisco16.6.1 (including)16.6.1 (including)
Ios_xeCisco16.6.2 (including)16.6.2 (including)
Ios_xeCisco16.6.3 (including)16.6.3 (including)
Ios_xeCisco16.6.4 (including)16.6.4 (including)
Ios_xeCisco16.6.4a (including)16.6.4a (including)
Ios_xeCisco16.6.4s (including)16.6.4s (including)
Ios_xeCisco16.6.5 (including)16.6.5 (including)
Ios_xeCisco16.6.5a (including)16.6.5a (including)
Ios_xeCisco16.6.5b (including)16.6.5b (including)
Ios_xeCisco16.6.6 (including)16.6.6 (including)
Ios_xeCisco16.6.7 (including)16.6.7 (including)
Ios_xeCisco16.6.7a (including)16.6.7a (including)
Ios_xeCisco16.6.8 (including)16.6.8 (including)
Ios_xeCisco16.7.1 (including)16.7.1 (including)
Ios_xeCisco16.7.1a (including)16.7.1a (including)
Ios_xeCisco16.7.1b (including)16.7.1b (including)
Ios_xeCisco16.7.2 (including)16.7.2 (including)
Ios_xeCisco16.7.3 (including)16.7.3 (including)
Ios_xeCisco16.7.4 (including)16.7.4 (including)
Ios_xeCisco16.8.1 (including)16.8.1 (including)
Ios_xeCisco16.8.1a (including)16.8.1a (including)
Ios_xeCisco16.8.1b (including)16.8.1b (including)
Ios_xeCisco16.8.1c (including)16.8.1c (including)
Ios_xeCisco16.8.1d (including)16.8.1d (including)
Ios_xeCisco16.8.1e (including)16.8.1e (including)
Ios_xeCisco16.8.1s (including)16.8.1s (including)
Ios_xeCisco16.8.2 (including)16.8.2 (including)
Ios_xeCisco16.8.3 (including)16.8.3 (including)
Ios_xeCisco16.9.1 (including)16.9.1 (including)
Ios_xeCisco16.9.1a (including)16.9.1a (including)
Ios_xeCisco16.9.1b (including)16.9.1b (including)
Ios_xeCisco16.9.1c (including)16.9.1c (including)
Ios_xeCisco16.9.1d (including)16.9.1d (including)
Ios_xeCisco16.9.1s (including)16.9.1s (including)
Ios_xeCisco16.9.2 (including)16.9.2 (including)
Ios_xeCisco16.9.2a (including)16.9.2a (including)
Ios_xeCisco16.9.2s (including)16.9.2s (including)
Ios_xeCisco16.9.3 (including)16.9.3 (including)
Ios_xeCisco16.9.3a (including)16.9.3a (including)
Ios_xeCisco16.9.3h (including)16.9.3h (including)
Ios_xeCisco16.9.3s (including)16.9.3s (including)
Ios_xeCisco16.9.4 (including)16.9.4 (including)
Ios_xeCisco16.9.4c (including)16.9.4c (including)
Ios_xeCisco16.9.5 (including)16.9.5 (including)
Ios_xeCisco16.9.5f (including)16.9.5f (including)
Ios_xeCisco16.9.6 (including)16.9.6 (including)
Ios_xeCisco16.10.1 (including)16.10.1 (including)
Ios_xeCisco16.10.1a (including)16.10.1a (including)
Ios_xeCisco16.10.1b (including)16.10.1b (including)
Ios_xeCisco16.10.1c (including)16.10.1c (including)
Ios_xeCisco16.10.1d (including)16.10.1d (including)
Ios_xeCisco16.10.1e (including)16.10.1e (including)
Ios_xeCisco16.10.1f (including)16.10.1f (including)
Ios_xeCisco16.10.1g (including)16.10.1g (including)
Ios_xeCisco16.10.1s (including)16.10.1s (including)
Ios_xeCisco16.10.2 (including)16.10.2 (including)
Ios_xeCisco16.10.3 (including)16.10.3 (including)
Ios_xeCisco16.11.1 (including)16.11.1 (including)
Ios_xeCisco16.11.1a (including)16.11.1a (including)
Ios_xeCisco16.11.1b (including)16.11.1b (including)
Ios_xeCisco16.11.1c (including)16.11.1c (including)
Ios_xeCisco16.11.1s (including)16.11.1s (including)
Ios_xeCisco16.11.2 (including)16.11.2 (including)
Ios_xeCisco16.12.1 (including)16.12.1 (including)
Ios_xeCisco16.12.1a (including)16.12.1a (including)
Ios_xeCisco16.12.1c (including)16.12.1c (including)
Ios_xeCisco16.12.1s (including)16.12.1s (including)
Ios_xeCisco16.12.1t (including)16.12.1t (including)
Ios_xeCisco16.12.1w (including)16.12.1w (including)
Ios_xeCisco16.12.1x (including)16.12.1x (including)
Ios_xeCisco16.12.1y (including)16.12.1y (including)
Ios_xeCisco16.12.1z (including)16.12.1z (including)
Ios_xeCisco16.12.2 (including)16.12.2 (including)
Ios_xeCisco16.12.2a (including)16.12.2a (including)
Ios_xeCisco16.12.2s (including)16.12.2s (including)
Ios_xeCisco16.12.2t (including)16.12.2t (including)
Ios_xeCisco16.12.3 (including)16.12.3 (including)
Ios_xeCisco16.12.3a (including)16.12.3a (including)
Ios_xeCisco16.12.3s (including)16.12.3s (including)
Ios_xeCisco16.12.4 (including)16.12.4 (including)
Ios_xeCisco16.12.4a (including)16.12.4a (including)
Ios_xeCisco17.1.1 (including)17.1.1 (including)
Ios_xeCisco17.1.1a (including)17.1.1a (including)
Ios_xeCisco17.1.1s (including)17.1.1s (including)
Ios_xeCisco17.1.1t (including)17.1.1t (including)
Ios_xeCisco17.1.2 (including)17.1.2 (including)
Ios_xeCisco17.2.1 (including)17.2.1 (including)
Ios_xeCisco17.2.1a (including)17.2.1a (including)
Ios_xeCisco17.2.1r (including)17.2.1r (including)
Ios_xeCisco17.2.1v (including)17.2.1v (including)
Ios_xeCisco17.2.2 (including)17.2.2 (including)
Ios_xeCisco17.3.1 (including)17.3.1 (including)
Ios_xeCisco17.3.1a (including)17.3.1a (including)
Ios_xeCisco17.3.1w (including)17.3.1w (including)
Ios_xeCisco17.3.2 (including)17.3.2 (including)
Ios_xeCisco17.3.2a (including)17.3.2a (including)

References