A vulnerability in TACACS+ and RADIUS remote authentication for Cisco...

7.1 CVSS

Vulnerability Description

A vulnerability in TACACS+ and RADIUS remote authentication for Cisco NX-OS Software could allow an unauthenticated, local attacker to cause an affected device to unexpectedly reload. This vulnerability is due to incorrect input validation when processing an authentication attempt if the directed request option is enabled for TACACS+ or RADIUS. An attacker could exploit this vulnerability by entering a crafted string at the login prompt of an affected device. A successful exploit could allow the attacker to cause the affected device to unexpectedly reload, resulting in a denial of service (DoS) condition.

Impact Analysis

Refer to official advisory for detailed impact metrics.

Remediation

Ensure systems are updated to the latest vendor-supplied patch levels.

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Credits & Attribution

No credits recorded in the NVD database.

References

https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-nxos-remoteauth-dos-XB6pv74m

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Affected Vendor

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Affected Software

Cisco NX-OS Software

Vulnerable Versions:

4.2(1)SV1(4), 4.2(1)SV1(4a), 4.2(1)SV1(4b), 4.2(1)SV1(5.1), 4.2(1)SV1(5.1a), 4.2(1)SV1(5.2), 4.2(1)SV1(5.2b), 4.2(1)SV2(1.1), 4.2(1)SV2(1.1a), 4.2(1)SV2(2.1), 4.2(1)SV2(2.1a), 4.2(1)SV2(2.2), 4.2(1)SV2(2.3), 5.2(1)SM1(5.1), 5.2(1)SM1(5.2), 5.2(1)SM1(5.2a), 5.2(1)SM1(5.2b), 5.2(1)SM1(5.2c), 5.2(1)SM3(1.1), 5.2(1)SM3(1.1a), 5.2(1)SM3(1.1b), 5.2(1)SM3(1.1c), 5.2(1)SM3(2.1), 5.2(1)SV3(1.4), 5.2(1)SV3(1.1), 5.2(1)SV3(1.3), 5.2(1)SV3(1.5a), 5.2(1)SV3(1.5b), 5.2(1)SV3(1.6), 5.2(1)SV3(1.10), 5.2(1)SV3(1.15), 5.2(1)SV3(2.1), 5.2(1)SV3(2.5), 5.2(1)SV3(2.8), 5.2(1)SV3(3.1), 5.2(1)SV3(1.2), 5.2(1)SV3(1.4b), 5.2(1)SV3(3.15), 5.2(1)SV3(4.1), 5.2(1)SV3(4.1a), 5.2(1)SV3(4.1b), 5.2(1)SV3(4.1c), 6.0(2)A3(1), 6.0(2)A3(2), 6.0(2)A3(4), 6.0(2)A4(1), 6.0(2)A4(2), 6.0(2)A4(3), 6.0(2)A4(4), 6.0(2)A4(5), 6.0(2)A4(6), 6.0(2)A6(1), 6.0(2)A6(1a), 6.0(2)A6(2), 6.0(2)A6(2a), 6.0(2)A6(3), 6.0(2)A6(3a), 6.0(2)A6(4), 6.0(2)A6(4a), 6.0(2)A6(5), 6.0(2)A6(5a), 6.0(2)A6(5b), 6.0(2)A6(6), 6.0(2)A6(7), 6.0(2)A6(8), 6.0(2)A7(1), 6.0(2)A7(1a), 6.0(2)A7(2), 6.0(2)A7(2a), 6.0(2)A8(1), 6.0(2)A8(2), 6.0(2)A8(3), 6.0(2)A8(4), 6.0(2)A8(4a), 6.0(2)A8(5), 6.0(2)A8(6), 6.0(2)A8(7), 6.0(2)A8(7a), 6.0(2)A8(7b), 6.0(2)A8(8), 6.0(2)A8(9), 6.0(2)A8(10a), 6.0(2)A8(10), 6.0(2)A8(11), 6.0(2)A8(11a), 6.0(2)A8(11b), 6.0(2)U2(1), 6.0(2)U2(2), 6.0(2)U2(3), 6.0(2)U2(4), 6.0(2)U2(5), 6.0(2)U2(6), 6.0(2)U3(1), 6.0(2)U3(2), 6.0(2)U3(3), 6.0(2)U3(4), 6.0(2)U3(5), 6.0(2)U3(6), 6.0(2)U3(7), 6.0(2)U3(8), 6.0(2)U3(9), 6.0(2)U4(1), 6.0(2)U4(2), 6.0(2)U4(3), 6.0(2)U4(4), 6.0(2)U5(1), 6.0(2)U5(2), 6.0(2)U5(3), 6.0(2)U5(4), 6.0(2)U6(1), 6.0(2)U6(2), 6.0(2)U6(3), 6.0(2)U6(4), 6.0(2)U6(5), 6.0(2)U6(6), 6.0(2)U6(7), 6.0(2)U6(8), 6.0(2)U6(1a), 6.0(2)U6(2a), 6.0(2)U6(3a), 6.0(2)U6(4a), 6.0(2)U6(5a), 6.0(2)U6(5b), 6.0(2)U6(5c), 6.0(2)U6(9), 6.0(2)U6(10), 6.2(2), 6.2(2a), 6.2(6), 6.2(6b), 6.2(8), 6.2(8a), 6.2(8b), 6.2(10), 6.2(12), 6.2(18), 6.2(16), 6.2(14), 6.2(6a), 6.2(20), 6.2(1), 6.2(3), 6.2(5), 6.2(5a), 6.2(5b), 6.2(7), 6.2(9), 6.2(9a), 6.2(9b), 6.2(9c), 6.2(11), 6.2(11b), 6.2(11c), 6.2(11d), 6.2(11e), 6.2(13), 6.2(13a), 6.2(13b), 6.2(15), 6.2(17), 6.2(19), 6.2(21), 6.2(23), 6.2(20a), 6.2(25), 6.2(22), 6.2(27), 6.2(29), 6.2(24), 6.2(31), 6.2(24a), 6.2(33), 7.0(3)F1(1), 7.0(3)F2(1), 7.0(3)F2(2), 7.0(3)F3(1), 7.0(3)F3(2), 7.0(3)F3(3), 7.0(3)F3(3a), 7.0(3)F3(4), 7.0(3)F3(3c), 7.0(3)F3(5), 7.0(3)I2(2a), 7.0(3)I2(2b), 7.0(3)I2(2c), 7.0(3)I2(2d), 7.0(3)I2(2e), 7.0(3)I2(3), 7.0(3)I2(4), 7.0(3)I2(5), 7.0(3)I2(1), 7.0(3)I2(1a), 7.0(3)I2(2), 7.0(3)I3(1), 7.0(3)I4(1), 7.0(3)I4(2), 7.0(3)I4(3), 7.0(3)I4(4), 7.0(3)I4(5), 7.0(3)I4(6), 7.0(3)I4(7), 7.0(3)I4(8), 7.0(3)I4(8a), 7.0(3)I4(8b), 7.0(3)I4(8z), 7.0(3)I4(9), 7.0(3)I5(1), 7.0(3)I5(2), 7.0(3)I6(1), 7.0(3)I6(2), 7.0(3)I7(1), 7.0(3)I7(2), 7.0(3)I7(3), 7.0(3)I7(4), 7.0(3)I7(5), 7.0(3)I7(5a), 7.0(3)I7(6), 7.0(3)I7(7), 7.0(3)I7(8), 7.0(3)I7(9), 7.0(3)I7(10), 7.1(0)N1(1a), 7.1(0)N1(1b), 7.1(0)N1(1), 7.1(1)N1(1), 7.1(2)N1(1), 7.1(3)N1(1), 7.1(3)N1(2), 7.1(4)N1(1), 7.1(5)N1(1), 7.1(5)N1(1b), 7.2(0)D1(1), 7.2(1)D1(1), 7.2(2)D1(2), 7.2(2)D1(1), 7.3(0)D1(1), 7.3(0)DX(1), 7.3(0)DY(1), 7.3(0)N1(1), 7.3(1)D1(1), 7.3(1)DY(1), 7.3(1)N1(1), 7.3(2)D1(1), 7.3(2)D1(2), 7.3(2)D1(3), 7.3(2)D1(3a), 7.3(2)N1(1), 7.3(3)N1(1), 8.0(1), 8.1(1), 8.1(2), 8.1(2a), 8.1(1a), 8.1(1b), 8.2(1), 8.2(2), 8.2(3), 8.2(4), 8.2(5), 8.2(6), 8.2(7), 8.2(7a), 8.2(8), 8.2(9), 8.3(1), 8.3(2), 9.2(1), 9.2(2), 9.2(2t), 9.2(3), 9.2(4), 9.2(2v), 9.2(1a), 7.3(4)N1(1), 7.3(3)D1(1), 7.3(4)D1(1), 7.3(5)N1(1), 5.2(1)SK3(1.1), 5.2(1)SK3(2.1), 5.2(1)SK3(2.2), 5.2(1)SK3(2.2b), 5.2(1)SK3(2.1a), 5.2(1)SV5(1.1), 5.2(1)SV5(1.2), 5.2(1)SV5(1.3), 5.2(1)SV5(1.3a), 5.2(1)SV5(1.3b), 5.2(1)SV5(1.3c), 8.4(1), 8.4(1a), 8.4(2), 8.4(2a), 8.4(3), 8.4(2b), 8.4(4), 8.4(2c), 8.4(4a), 8.4(5), 8.4(2d), 8.4(6), 8.4(2e), 8.4(6a), 8.4(7), 8.4(2f), 9.3(1), 9.3(2), 9.3(3), 9.3(4), 9.3(5), 9.3(6), 9.3(7), 9.3(7a), 9.3(8), 9.3(9), 9.3(10), 9.3(11), 7.3(6)N1(1), 7.3(5)D1(1), 7.3(7)N1(1), 7.3(7)N1(1a), 7.3(7)N1(1b), 7.3(6)D1(1), 7.3(8)N1(1), 7.3(7)D1(1), 7.3(9)N1(1), 10.1(1), 10.1(2), 10.1(2t), 8.5(1), 7.3(10)N1(1), 7.3(8)D1(1), 10.2(1), 10.2(1q), 10.2(2), 10.2(3), 10.2(3t), 10.2(4), 10.2(5), 7.3(9)D1(1), 7.3(11)N1(1), 7.3(12)N1(1), 10.3(1), 10.3(2), 7.3(13)N1(1)