PT-2021-3881 · Juniper Networks · Junos

Published

2021-07-14

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Updated

2022-09-03

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CVE-2021-0283

CVSS v2.0

7.8

High

VectorAV:N/AC:L/Au:N/C:N/I:N/A:C
Name of the Vulnerable Software and Affected Versions Juniper Networks Junos OS versions prior to 12.3R12-S19 Juniper Networks Junos OS versions prior to 15.1R7-S10 Juniper Networks Junos OS versions 16.1R1 and later versions Juniper Networks Junos OS versions 16.2R1 and later versions Juniper Networks Junos OS versions 17.1R1 and later versions Juniper Networks Junos OS versions 17.2R1 and later versions Juniper Networks Junos OS versions prior to 17.3R3-S12 Juniper Networks Junos OS versions 17.4R1 and later versions Juniper Networks Junos OS versions prior to 18.1R3-S13 Juniper Networks Junos OS versions 18.2R1 and later versions Juniper Networks Junos OS versions prior to 18.3R3-S5 Juniper Networks Junos OS versions prior to 18.4R2-S9, 18.4R3-S9 Juniper Networks Junos OS versions prior to 19.1R3-S6 Juniper Networks Junos OS versions prior to 19.2R1-S7, 19.2R3-S3 Juniper Networks Junos OS versions prior to 19.3R2-S7, 19.3R3-S3 Juniper Networks Junos OS versions prior to 19.4R3-S5 Juniper Networks Junos OS versions prior to 20.1R2-S2, 20.1R3-S1 Juniper Networks Junos OS versions prior to 20.2R3-S2 Juniper Networks Junos OS versions prior to 20.3R3 Juniper Networks Junos OS versions prior to 20.4R2-S1, 20.4R3 Juniper Networks Junos OS versions prior to 21.1R1-S1, 21.1R2 Juniper Networks Junos OS versions prior to 21.2R1-S1, 21.2R2
Description A buffer overflow vulnerability in the TCP/IP stack of Juniper Networks Junos OS allows an attacker to send specific sequences of packets to the device, thereby causing a Denial of Service (DoS). By repeatedly sending these sequences of packets to the device, an attacker can sustain the Denial of Service (DoS) condition. The device will abnormally shut down as a result of these sent packets. A potential indicator of compromise will be the following message in the log files: "eventd[13955]: SYSTEM ABNORMAL SHUTDOWN: System abnormally shut down". These issues are only triggered by traffic destined to the device. Transit traffic will not trigger these issues.
Recommendations For Juniper Networks Junos OS versions prior to 12.3R12-S19, update to version 12.3R12-S19 or later. For Juniper Networks Junos OS versions prior to 15.1R7-S10, update to version 15.1R7-S10 or later. For Juniper Networks Junos OS versions 16.1R1 and later versions, restrict access to the device to minimize the risk of exploitation. For Juniper Networks Junos OS versions 16.2R1 and later versions, restrict access to the device to minimize the risk of exploitation. For Juniper Networks Junos OS versions prior to 17.3R3-S12, update to version 17.3R3-S12 or later. For Juniper Networks Junos OS versions 17.4R1 and later versions, restrict access to the device to minimize the risk of exploitation. For Juniper Networks Junos OS versions prior to 18.1R3-S13, update to version 18.1R3-S13 or later. For Juniper Networks Junos OS versions 18.2R1 and later versions, restrict access to the device to minimize the risk of exploitation. For Juniper Networks Junos OS versions prior to 18.3R3-S5, update to version 18.3R3-S5 or later. For Juniper Networks Junos OS versions prior to 18.4R2-S9, 18.4R3-S9, update to version 18.4R2-S9, 18.4R3-S9 or later. For Juniper Networks Junos OS versions prior to 19.1R3-S6, update to version 19.1R3-S6 or later. For Juniper Networks Junos OS versions prior to 19.2R1-S7, 19.2R3-S3, update to version 19.2R1-S7, 19.2R3-S3 or later. For Juniper Networks Junos OS versions prior to 19.3R2-S7, 19.3R3-S3, update to version 19.3R2-S7, 19.3R3-S3 or later. For Juniper Networks Junos OS versions prior to 19.4R3-S5, update to version 19.4R3-S5 or later. For Juniper Networks Junos OS versions prior to 20.1R2-S2, 20.1R3-S1, update to version 20.1R2-S2, 20.1R3-S1 or later. For Juniper Networks Junos OS versions prior to 20.2R3-S2, update to version 20.2R3-S2 or later. For Juniper Networks Junos OS versions prior to 20.3R3, update to version 20.3R3 or later. For Juniper Networks Junos OS versions prior to 20.4R2-S1, 20.4R3, update to version 20.4R2-S1, 20.4R3 or later. For Juniper Networks Junos OS versions prior to 21.1R1-S1, 21.1R2, update to version 21.1R1-S1, 21.1R2 or later. For Juniper Networks Junos OS versions prior to 21.2R1-S1, 21.2R2, update to version 21.2R1-S1, 21.2R2 or later.

Fix

DoS

Buffer Overflow

Weakness Enumeration

CWE-120

Related Identifiers

BDU:2021-04262
CVE-2021-0283

Affected Products

Junos