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CiscoCVE-2021-1377

HistoryMar 24, 2021 - 8:15 p.m.

CVE-2021-1377

2021-03-2420:15:13

CWE-399

cisco

web.nvd.nist.gov

cve-2021-1377

arp

cisco

ios

software

remote attacker

denial of service

CVSS2

Attack Vector

NETWORK

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

PARTIAL

AV:N/AC:L/Au:N/C:N/I:N/A:P

CVSS3

5.8

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

CHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

LOW

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:L

AI Score

5.8

Confidence

High

EPSS

0.002

Percentile

51.5%

JSON

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 configurations

Nvd

Node

ciscoiosMatch12.2\(6\)i1

ciscoiosMatch15.1\(3\)svr1

ciscoiosMatch15.1\(3\)svr2

ciscoiosMatch15.1\(3\)svr3

ciscoiosMatch15.1\(3\)svs

ciscoiosMatch15.1\(3\)svs1

ciscoiosMatch15.2\(2\)e6

ciscoiosMatch15.2\(2\)e7

ciscoiosMatch15.2\(2\)e7b

ciscoiosMatch15.2\(2\)e8

ciscoiosMatch15.2\(2\)e9

ciscoiosMatch15.2\(2\)e9a

ciscoiosMatch15.2\(2\)e10

ciscoiosMatch15.2\(3\)e5

ciscoiosMatch15.2\(4\)e4

ciscoiosMatch15.2\(4\)e5

ciscoiosMatch15.2\(4\)e5a

ciscoiosMatch15.2\(4\)e6

ciscoiosMatch15.2\(4\)e7

ciscoiosMatch15.2\(4\)e8

ciscoiosMatch15.2\(4\)e9

ciscoiosMatch15.2\(4\)e10

ciscoiosMatch15.2\(4\)e10a

ciscoiosMatch15.2\(4\)ea6

ciscoiosMatch15.2\(4\)ea7

ciscoiosMatch15.2\(4\)ea8

ciscoiosMatch15.2\(4\)ea9

ciscoiosMatch15.2\(4\)ea9a

ciscoiosMatch15.2\(4\)ea10

ciscoiosMatch15.2\(5\)e1

ciscoiosMatch15.2\(5\)e2

ciscoiosMatch15.2\(5\)e2b

ciscoiosMatch15.2\(5\)e2c

ciscoiosMatch15.2\(5\)ex

ciscoiosMatch15.2\(5a\)e1

ciscoiosMatch15.2\(6\)e

ciscoiosMatch15.2\(6\)e0a

ciscoiosMatch15.2\(6\)e0c

ciscoiosMatch15.2\(6\)e1

ciscoiosMatch15.2\(6\)e1a

ciscoiosMatch15.2\(6\)e1s

ciscoiosMatch15.2\(6\)e2

ciscoiosMatch15.2\(6\)e2a

ciscoiosMatch15.2\(6\)e2b

ciscoiosMatch15.2\(6\)e3

ciscoiosMatch15.2\(6\)eb

ciscoiosMatch15.2\(7\)e

ciscoiosMatch15.2\(7\)e0a

ciscoiosMatch15.2\(7\)e0b

ciscoiosMatch15.2\(7\)e0s

ciscoiosMatch15.2\(7\)e1

ciscoiosMatch15.2\(7\)e1a

ciscoiosMatch15.2\(7\)e2

ciscoiosMatch15.2\(7\)e2a

ciscoiosMatch15.2\(7\)e2b

ciscoiosMatch15.2\(7\)e3

ciscoiosMatch15.2\(7a\)e0b

ciscoiosMatch15.2\(7b\)e0b

ciscoiosMatch15.3\(3\)jpc97

ciscoiosMatch15.4\(1\)sy

ciscoiosMatch15.4\(1\)sy1

ciscoiosMatch15.4\(1\)sy2

ciscoiosMatch15.4\(1\)sy3

ciscoiosMatch15.4\(1\)sy4

ciscoiosMatch15.5\(1\)sy

ciscoiosMatch15.5\(1\)sy1

ciscoiosMatch15.5\(1\)sy2

ciscoiosMatch15.5\(1\)sy3

ciscoiosMatch15.5\(1\)sy4

ciscoiosMatch15.5\(1\)sy5

ciscoiosMatch15.5\(1\)sy6

ciscoiosMatch15.5\(3\)m4

ciscoiosMatch15.5\(3\)m4a

ciscoiosMatch15.5\(3\)m4b

ciscoiosMatch15.5\(3\)m4c

ciscoiosMatch15.5\(3\)m5

ciscoiosMatch15.5\(3\)m6

ciscoiosMatch15.5\(3\)m6a

ciscoiosMatch15.5\(3\)m7

ciscoiosMatch15.5\(3\)m8

ciscoiosMatch15.5\(3\)m9

ciscoiosMatch15.5\(3\)m10

ciscoiosMatch15.5\(3\)m11

ciscoiosMatch15.5\(3\)s4

ciscoiosMatch15.5\(3\)s5

ciscoiosMatch15.5\(3\)s6

ciscoiosMatch15.5\(3\)s6a

ciscoiosMatch15.5\(3\)s6b

ciscoiosMatch15.5\(3\)s7

ciscoiosMatch15.5\(3\)s8

ciscoiosMatch15.5\(3\)s9

ciscoiosMatch15.5\(3\)s9a

ciscoiosMatch15.5\(3\)s10

ciscoiosMatch15.5\(3\)s10a

ciscoiosMatch15.6\(3\)m2

ciscoiosMatch15.6\(3\)m2a

ciscoiosMatch15.6\(3\)m3

ciscoiosMatch15.6\(3\)m3a

ciscoiosMatch15.6\(3\)m4

ciscoiosMatch15.6\(3\)m5

ciscoiosMatch15.6\(3\)m6

ciscoiosMatch15.6\(3\)m6a

ciscoiosMatch15.6\(3\)m6b

ciscoiosMatch15.6\(3\)m7

ciscoiosMatch15.6\(3\)m8

ciscoiosMatch15.6\(3\)m9

ciscoiosMatch15.7\(3\)m

ciscoiosMatch15.7\(3\)m0a

ciscoiosMatch15.7\(3\)m1

ciscoiosMatch15.7\(3\)m2

ciscoiosMatch15.7\(3\)m3

ciscoiosMatch15.7\(3\)m4

ciscoiosMatch15.7\(3\)m4a

ciscoiosMatch15.7\(3\)m4b

ciscoiosMatch15.7\(3\)m5

ciscoiosMatch15.7\(3\)m6

ciscoiosMatch15.7\(3\)m7

ciscoiosMatch15.8\(3\)m

ciscoiosMatch15.8\(3\)m0a

ciscoiosMatch15.8\(3\)m0b

ciscoiosMatch15.8\(3\)m1

ciscoiosMatch15.8\(3\)m1a

ciscoiosMatch15.8\(3\)m2

ciscoiosMatch15.8\(3\)m2a

ciscoiosMatch15.8\(3\)m3

ciscoiosMatch15.8\(3\)m3a

ciscoiosMatch15.8\(3\)m3b

ciscoiosMatch15.8\(3\)m4

ciscoiosMatch15.8\(3\)m5

ciscoiosMatch15.9\(3\)m

ciscoiosMatch15.9\(3\)m0a

ciscoiosMatch15.9\(3\)m1

ciscoiosMatch15.9\(3\)m2

ciscoiosMatch15.9\(3\)m2a

ciscoios_xeMatch3.6.6e

ciscoios_xeMatch3.6.7ae

ciscoios_xeMatch3.6.7be

ciscoios_xeMatch3.6.7e

ciscoios_xeMatch3.6.8e

ciscoios_xeMatch3.6.9ae

ciscoios_xeMatch3.6.9e

ciscoios_xeMatch3.6.10e

ciscoios_xeMatch3.7.5e

ciscoios_xeMatch3.8.4e

ciscoios_xeMatch3.8.5ae

ciscoios_xeMatch3.8.5e

ciscoios_xeMatch3.8.6e

ciscoios_xeMatch3.8.7e

ciscoios_xeMatch3.8.8e

ciscoios_xeMatch3.8.9e

ciscoios_xeMatch3.8.10e

ciscoios_xeMatch3.9.1e

ciscoios_xeMatch3.9.2be

ciscoios_xeMatch3.9.2e

ciscoios_xeMatch3.10.0ce

ciscoios_xeMatch3.10.0e

ciscoios_xeMatch3.10.1ae

ciscoios_xeMatch3.10.1e

ciscoios_xeMatch3.10.1se

ciscoios_xeMatch3.10.2e

ciscoios_xeMatch3.10.3e

ciscoios_xeMatch3.11.0e

ciscoios_xeMatch3.11.1ae

ciscoios_xeMatch3.11.1e

ciscoios_xeMatch3.11.2ae

ciscoios_xeMatch3.11.2e

ciscoios_xeMatch3.11.3ae

ciscoios_xeMatch3.11.3e

ciscoios_xeMatch3.16.4as

ciscoios_xeMatch3.16.4bs

ciscoios_xeMatch3.16.4cs

ciscoios_xeMatch3.16.4ds

ciscoios_xeMatch3.16.4es

ciscoios_xeMatch3.16.4gs

ciscoios_xeMatch3.16.4s

ciscoios_xeMatch3.16.5as

ciscoios_xeMatch3.16.5bs

ciscoios_xeMatch3.16.5s

ciscoios_xeMatch3.16.6bs

ciscoios_xeMatch3.16.6s

ciscoios_xeMatch3.16.7as

ciscoios_xeMatch3.16.7bs

ciscoios_xeMatch3.16.7s

ciscoios_xeMatch3.16.8s

ciscoios_xeMatch3.16.9s

ciscoios_xeMatch3.16.10as

ciscoios_xeMatch3.16.10s

ciscoios_xeMatch16.3.2

ciscoios_xeMatch16.3.3

ciscoios_xeMatch16.3.4

ciscoios_xeMatch16.3.5

ciscoios_xeMatch16.3.5b

ciscoios_xeMatch16.3.6

ciscoios_xeMatch16.3.7

ciscoios_xeMatch16.3.8

ciscoios_xeMatch16.3.9

ciscoios_xeMatch16.3.10

ciscoios_xeMatch16.3.11

ciscoios_xeMatch16.4.1

ciscoios_xeMatch16.4.2

ciscoios_xeMatch16.4.3

ciscoios_xeMatch16.5.1

ciscoios_xeMatch16.5.1a

ciscoios_xeMatch16.5.1b

ciscoios_xeMatch16.5.2

ciscoios_xeMatch16.5.3

ciscoios_xeMatch16.6.1

ciscoios_xeMatch16.6.2

ciscoios_xeMatch16.6.3

ciscoios_xeMatch16.6.4

ciscoios_xeMatch16.6.4a

ciscoios_xeMatch16.6.4s

ciscoios_xeMatch16.6.5

ciscoios_xeMatch16.6.5a

ciscoios_xeMatch16.6.5b

ciscoios_xeMatch16.6.6

ciscoios_xeMatch16.6.7

ciscoios_xeMatch16.6.7a

ciscoios_xeMatch16.6.8

ciscoios_xeMatch16.7.1

ciscoios_xeMatch16.7.1a

ciscoios_xeMatch16.7.1b

ciscoios_xeMatch16.7.2

ciscoios_xeMatch16.7.3

ciscoios_xeMatch16.7.4

ciscoios_xeMatch16.8.1

ciscoios_xeMatch16.8.1a

ciscoios_xeMatch16.8.1b

ciscoios_xeMatch16.8.1c

ciscoios_xeMatch16.8.1d

ciscoios_xeMatch16.8.1e

ciscoios_xeMatch16.8.1s

ciscoios_xeMatch16.8.2

ciscoios_xeMatch16.8.3

ciscoios_xeMatch16.9.1

ciscoios_xeMatch16.9.1a

ciscoios_xeMatch16.9.1b

ciscoios_xeMatch16.9.1c

ciscoios_xeMatch16.9.1d

ciscoios_xeMatch16.9.1s

ciscoios_xeMatch16.9.2

ciscoios_xeMatch16.9.2a

ciscoios_xeMatch16.9.2s

ciscoios_xeMatch16.9.3

ciscoios_xeMatch16.9.3a

ciscoios_xeMatch16.9.3h

ciscoios_xeMatch16.9.3s

ciscoios_xeMatch16.9.4

ciscoios_xeMatch16.9.4c

ciscoios_xeMatch16.9.5

ciscoios_xeMatch16.9.5f

ciscoios_xeMatch16.9.6

ciscoios_xeMatch16.10.1

ciscoios_xeMatch16.10.1a

ciscoios_xeMatch16.10.1b

ciscoios_xeMatch16.10.1c

ciscoios_xeMatch16.10.1d

ciscoios_xeMatch16.10.1e

ciscoios_xeMatch16.10.1f

ciscoios_xeMatch16.10.1g

ciscoios_xeMatch16.10.1s

ciscoios_xeMatch16.10.2

ciscoios_xeMatch16.10.3

ciscoios_xeMatch16.11.1

ciscoios_xeMatch16.11.1a

ciscoios_xeMatch16.11.1b

ciscoios_xeMatch16.11.1c

ciscoios_xeMatch16.11.1s

ciscoios_xeMatch16.11.2

ciscoios_xeMatch16.12.1

ciscoios_xeMatch16.12.1a

ciscoios_xeMatch16.12.1c

ciscoios_xeMatch16.12.1s

ciscoios_xeMatch16.12.1t

ciscoios_xeMatch16.12.1w

ciscoios_xeMatch16.12.1x

ciscoios_xeMatch16.12.1y

ciscoios_xeMatch16.12.1z

ciscoios_xeMatch16.12.2

ciscoios_xeMatch16.12.2a

ciscoios_xeMatch16.12.2s

ciscoios_xeMatch16.12.2t

ciscoios_xeMatch16.12.3

ciscoios_xeMatch16.12.3a

ciscoios_xeMatch16.12.3s

ciscoios_xeMatch16.12.4

ciscoios_xeMatch16.12.4a

ciscoios_xeMatch17.1.1

ciscoios_xeMatch17.1.1a

ciscoios_xeMatch17.1.1s

ciscoios_xeMatch17.1.1t

ciscoios_xeMatch17.1.2

ciscoios_xeMatch17.2.1

ciscoios_xeMatch17.2.1a

ciscoios_xeMatch17.2.1r

ciscoios_xeMatch17.2.1v

ciscoios_xeMatch17.2.2

ciscoios_xeMatch17.3.1

ciscoios_xeMatch17.3.1a

ciscoios_xeMatch17.3.1w

ciscoios_xeMatch17.3.2

ciscoios_xeMatch17.3.2a

VendorProductVersionCPE
ciscoios12.2(6)i1cpe:2.3:o:cisco:ios:12.2\(6\)i1:*:*:*:*:*:*:*
ciscoios15.1(3)svr1cpe:2.3:o:cisco:ios:15.1\(3\)svr1:*:*:*:*:*:*:*
ciscoios15.1(3)svr2cpe:2.3:o:cisco:ios:15.1\(3\)svr2:*:*:*:*:*:*:*
ciscoios15.1(3)svr3cpe:2.3:o:cisco:ios:15.1\(3\)svr3:*:*:*:*:*:*:*
ciscoios15.1(3)svscpe:2.3:o:cisco:ios:15.1\(3\)svs:*:*:*:*:*:*:*
ciscoios15.1(3)svs1cpe:2.3:o:cisco:ios:15.1\(3\)svs1:*:*:*:*:*:*:*
ciscoios15.2(2)e6cpe:2.3:o:cisco:ios:15.2\(2\)e6:*:*:*:*:*:*:*
ciscoios15.2(2)e7cpe:2.3:o:cisco:ios:15.2\(2\)e7:*:*:*:*:*:*:*
ciscoios15.2(2)e7bcpe:2.3:o:cisco:ios:15.2\(2\)e7b:*:*:*:*:*:*:*
ciscoios15.2(2)e8cpe:2.3:o:cisco:ios:15.2\(2\)e8:*:*:*:*:*:*:*

Vendor	Product	Version	CPE
cisco	ios	12.2(6)i1	cpe:2.3:o:cisco:ios:12.2\(6\)i1:::::::*
cisco	ios	15.1(3)svr1	cpe:2.3:o:cisco:ios:15.1\(3\)svr1:::::::*
cisco	ios	15.1(3)svr2	cpe:2.3:o:cisco:ios:15.1\(3\)svr2:::::::*
cisco	ios	15.1(3)svr3	cpe:2.3:o:cisco:ios:15.1\(3\)svr3:::::::*
cisco	ios	15.1(3)svs	cpe:2.3:o:cisco:ios:15.1\(3\)svs:::::::*
cisco	ios	15.1(3)svs1	cpe:2.3:o:cisco:ios:15.1\(3\)svs1:::::::*
cisco	ios	15.2(2)e6	cpe:2.3:o:cisco:ios:15.2\(2\)e6:::::::*
cisco	ios	15.2(2)e7	cpe:2.3:o:cisco:ios:15.2\(2\)e7:::::::*
cisco	ios	15.2(2)e7b	cpe:2.3:o:cisco:ios:15.2\(2\)e7b:::::::*
cisco	ios	15.2(2)e8	cpe:2.3:o:cisco:ios:15.2\(2\)e8:::::::*

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CNA Affected

[
  {
    "product": "Cisco IOS",
    "vendor": "Cisco",
    "versions": [
      {
        "status": "affected",
        "version": "n/a"
      }
    ]
  }
]

References

tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-arp-mtfhBfjE

CVSS2

Attack Vector

NETWORK

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

PARTIAL

AV:N/AC:L/Au:N/C:N/I:N/A:P

CVSS3

5.8

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

CHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

LOW

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:L

AI Score

5.8

Confidence

High

EPSS

0.002

Percentile

51.5%

JSON

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