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

References