CVE-2021-0240 - Improper Handling of Exceptional Conditions

Severity

74%

Complexity

27%

Confidentiality

66%

On Juniper Networks Junos OS platforms configured as DHCPv6 local server or DHCPv6 Relay Agent, the Juniper Networks Dynamic Host Configuration Protocol Daemon (JDHCPD) process might crash if a malformed DHCPv6 packet is received, resulting in a restart of the daemon. The daemon automatically restarts without intervention, but continued receipt and processing of this packet will create a sustained Denial of Service (DoS) condition. This issue only affects DHCPv6. DHCPv4 is not affected by this issue. This issue affects Juniper Networks Junos OS: 17.3 versions prior to 17.3R3-S12; 17.4 versions prior to 17.4R3-S5; 18.1 versions prior to 18.1R3-S13; 18.2 versions prior to 18.2R3-S8; 18.3 versions prior to 18.3R3-S5; 18.4 versions prior to 18.4R1-S8, 18.4R3-S7; 19.1 versions prior to 19.1R3-S5; 19.2 versions prior to 19.2R3-S2; 19.3 versions prior to 19.3R3-S2; 19.4 versions prior to 19.4R3-S2; 20.1 versions prior to 20.1R3; 20.2 versions prior to 20.2R2-S3, 20.2R3; 20.3 versions prior to 20.3R2; 20.4 versions prior to 20.4R2.

CVSS 3.1 Base Score 7.4. CVSS Attack Vector: adjacent_network. CVSS Attack Complexity: low. CVSS Vector: (CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H).

CVSS 3.1 Base Score 7.5. CVSS Attack Vector: network. CVSS Attack Complexity: low. CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H).

CVSS 2.0 Base Score 5. CVSS Attack Vector: network. CVSS Attack Complexity: low. CVSS Vector: (AV:N/AC:L/Au:N/C:N/I:N/A:P).

CVSS 3.1 Base Score 6.5. CVSS Attack Vector: adjacent_network. CVSS Attack Complexity: low. CVSS Vector: (CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H).

CVSS 2.0 Base Score 2.9. CVSS Attack Vector: adjacent_network. CVSS Attack Complexity: medium. CVSS Vector: (AV:A/AC:M/Au:N/C:N/I:N/A:P).

Overview

Type

Juniper

First reported 3 years ago

2021-04-22 20:15:00

Last updated 3 years ago

2021-07-23 19:09:00

Affected Software

Juniper JUNOS 17.3

17.3

Juniper JUNOS 17.3 R1-S1

17.3

Juniper Junos 17.3 R2

17.3

Juniper JUNOS 17.3 R2-S1

17.3

Juniper JUNOS 17.3R2-S2

17.3

Juniper Junos OS 17.3 R2-S3

17.3

Juniper JUNOS 17.3 R2-S4

17.3

Juniper JunOS 17.3 R3

17.3

Juniper JUNOS 17.3 R3-S1

17.3

Juniper JUNOS 17.3 R3-S2

17.3

Juniper JUNOS 17.3 R3-S3

17.3

Juniper JUNOS 17.3R3-S4

17.3

Juniper JUNOS 17.3 R3-S7

17.3

Juniper JUNOS 17.4

17.4

Juniper Junos 17.4 R1

17.4

Juniper JUNOS 17.4 R1-S1

17.4

Juniper JUNOS 17.4 R1-S2

17.4

Juniper JUNOS 17.4R1-S4

17.4

Juniper JunOS 17.4 R1-s5

17.4

Juniper JUNOS 17.4 R1-S6

17.4

Juniper JUNOS 17.4R1-S7

17.4

Juniper Junos 17.4 R2

17.4

Juniper JUNOS 17.4 R2-S1

17.4

Juniper JUNOS 17.4 R2-S10

17.4

Juniper Junos 17.4 R2-S2

17.4

Juniper JUNOS 17.4 R2-S3

17.4

Juniper JUNOS 17.4R2-S4

17.4

Juniper JUNOS 17.4 R2-S5

17.4

Juniper JUNOS 17.4 R2-S6

17.4

Juniper JUNOS 17.4 R2-S7

17.4

Juniper JUNOS 17.4 R2-S8

17.4

Juniper JUNOS 17.4 R2-S9

17.4

Juniper JUNOS 17.4 R3

17.4

Juniper JUNOS 17.4 R3-S1

17.4

Juniper JUNOS 18.1

18.1

Juniper JUNOS 18.1R2

18.1

Juniper JUNOS R2-S1

18.1

Juniper JUNOS R2-S2

18.1

Juniper JUNOS 18.1 R2-S4

18.1

Juniper JUNOS 18.1 R3

18.1

Juniper JunOS 18.1 R3-s1

18.1

Juniper JUNOS 18.1 R3-S2

18.1

Juniper JUNOS 18.1 R3-S3

18.1

Juniper JUNOS 18.1R3-S4

18.1

Juniper JUNOS 18.1 R3-S6

18.1

Juniper JUNOS 18.1 R3-S7

18.1

Juniper JUNOS 18.1 R3-S8

18.1

Juniper JUNOS 18.1 R3-S9

18.1

Juniper JUNOS 18.2

18.2

Juniper JunOS 18.2 R1

18.2

Juniper JunOS 18.2 R1-S3

18.2

Juniper JUNOS 18.2 R1-S5

18.2

Juniper JUNOS 18.2 R2-S1

18.2

Juniper JUNOS 18.2R2-S2

18.2

Juniper JUNOS 18.2R2-S3

18.2

Juniper JUNOS18.2 R2-S4

18.2

Juniper JUNOS 18.2 R2-S5

18.2

Juniper JUNOS 18.2 R2-S6

18.2

Juniper JUNOS 18.2R3

18.2

Juniper JUNOS 18.2 R3-S1

18.2

Juniper JUNOS 18.2 R3-S2

18.2

Juniper JUNOS 18.2 R3-S3

18.2

Juniper JUNOS 18.3

18.3

Juniper JUNOS 18.3 R1

18.3

Juniper JUNOS 18.3 R1-S1

18.3

Juniper JUNOS 18.3 R1-S2

18.3

Juniper JUNOS 18.3R1-S3

18.3

Juniper JUNOS 18.3 R1-S5

18.3

Juniper JUNOS 18.3 R1-S6

18.3

Juniper JUNOS 18.3 R2

18.3

Juniper JUNOS 18.3 R2-S1

18.3

Juniper JUNOS 18.3 R2-S2

18.3

Juniper JUNOS 18.3 R2-S3

18.3

Juniper JUNOS 18.3 R3

18.3

Juniper JUNOS 18.3 R3-S1

18.3

Juniper JUNOS 18.4

18.4

Juniper JunOS 18.4 R1

18.4

Juniper Junos OS 18.4 R1-S1

18.4

Juniper JUNOS 18.4R1-S2

18.4

Juniper JUNOS 18.4 R1-S5

18.4

Juniper JUNOS 18.4 R1-S6

18.4

Juniper JUNOS 18.4R2

18.4

Juniper JUNOS 18.4 R2-S1

18.4

Juniper JUNOS 18.4 R2-S2

18.4

Juniper JUNOS 18.4 R2-S3

18.4

Juniper JUNOS 18.4 R3

18.4

Juniper Junos OS 19.1

19.1

Juniper Junos OS 19.1 R1

19.1

Juniper Junos OS 19.1 R1-s1

19.1

Juniper JUNOS 19.1 R1-S2

19.1

Juniper JUNOS 19.1 R1-S3

19.1

Juniper JUNOS 19.1 R1-S4

19.1

Juniper Junos OS 19.1 R2

19.1

Juniper Junos OS 19.2

19.2

Juniper Junos OS 19.2 R1

19.2

Juniper JUNOS 19.2 R1-S1

19.2

Juniper JUNOS 19.2 R1-S2

19.2

Juniper JUNOS 19.2 R1-S3

19.2

Juniper JUNOS 19.3

19.3

Juniper JUNOS 19.3 R1

19.3

Juniper JUNOS 19.3 R1-S1

19.3

Juniper JUNOS 19.3 R2

19.3

Juniper JUNOS 19.3 R2-S1

19.3

Juniper JUNOS 19.3 R2-S2

19.3

Juniper JUNOS 19.4 R1

19.4

Juniper JUNOS 19.4 R1-S1

19.4

Juniper JUNOS 20.1 R1

20.1

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