First published: Thu Jul 15 2021(Updated: )
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 issue are only triggered by traffic destined to the device. Transit traffic will not trigger these issues. This issue affects: Juniper Networks Junos OS 12.3 versions prior to 12.3R12-S19; 15.1 versions prior to 15.1R7-S10; 16.1 version 16.1R1 and later versions; 16.2 version 16.2R1 and later versions; 17.1 version 17.1R1 and later versions; 17.2 version 17.2R1 and later versions; 17.3 versions prior to 17.3R3-S12; 17.4 version 17.4R1 and later versions; 18.1 versions prior to 18.1R3-S13; 18.2 version 18.2R1 and later versions; 18.3 versions prior to 18.3R3-S5; 18.4 versions prior to 18.4R2-S9, 18.4R3-S9; 19.1 versions prior to 19.1R3-S6; 19.2 versions prior to 19.2R1-S7, 19.2R3-S3; 19.3 versions prior to 19.3R2-S7, 19.3R3-S3; 19.4 versions prior to 19.4R3-S5; 20.1 versions prior to 20.1R2-S2, 20.1R3-S1; 20.2 versions prior to 20.2R3-S2; 20.3 versions prior to 20.3R3; 20.4 versions prior to 20.4R2-S1, 20.4R3; 21.1 versions prior to 21.1R1-S1, 21.1R2; 21.2 versions prior to 21.2R1-S1, 21.2R2.
Credit: sirt@juniper.net
Affected Software | Affected Version | How to fix |
---|---|---|
Juniper Junos | =12.3 | |
Juniper Junos | =12.3-r1 | |
Juniper Junos | =12.3-r10 | |
Juniper Junos | =12.3-r10-s1 | |
Juniper Junos | =12.3-r10-s2 | |
Juniper Junos | =12.3-r11 | |
Juniper Junos | =12.3-r12 | |
Juniper Junos | =12.3-r12-s1 | |
Juniper Junos | =12.3-r12-s10 | |
Juniper Junos | =12.3-r12-s11 | |
Juniper Junos | =12.3-r12-s12 | |
Juniper Junos | =12.3-r12-s13 | |
Juniper Junos | =12.3-r12-s14 | |
Juniper Junos | =12.3-r12-s15 | |
Juniper Junos | =12.3-r12-s16 | |
Juniper Junos | =12.3-r12-s17 | |
Juniper Junos | =12.3-r12-s18 | |
Juniper Junos | =12.3-r12-s3 | |
Juniper Junos | =12.3-r12-s4 | |
Juniper Junos | =12.3-r12-s6 | |
Juniper Junos | =12.3-r12-s8 | |
Juniper Junos | =15.1 | |
Juniper Junos | =15.1-a1 | |
Juniper Junos | =15.1-f | |
Juniper Junos | =15.1-f1 | |
Juniper Junos | =15.1-f2 | |
Juniper Junos | =15.1-f2-s1 | |
Juniper Junos | =15.1-f2-s2 | |
Juniper Junos | =15.1-f2-s3 | |
Juniper Junos | =15.1-f2-s4 | |
Juniper Junos | =15.1-f3 | |
Juniper Junos | =15.1-f4 | |
Juniper Junos | =15.1-f5 | |
Juniper Junos | =15.1-f5-s7 | |
Juniper Junos | =15.1-f6 | |
Juniper Junos | =15.1-f6-s1 | |
Juniper Junos | =15.1-f6-s10 | |
Juniper Junos | =15.1-f6-s12 | |
Juniper Junos | =15.1-f6-s2 | |
Juniper Junos | =15.1-f6-s3 | |
Juniper Junos | =15.1-f6-s4 | |
Juniper Junos | =15.1-f6-s5 | |
Juniper Junos | =15.1-f6-s6 | |
Juniper Junos | =15.1-f6-s7 | |
Juniper Junos | =15.1-f6-s8 | |
Juniper Junos | =15.1-f6-s9 | |
Juniper Junos | =15.1-f7 | |
Juniper Junos | =15.1-r | |
Juniper Junos | =15.1-r1 | |
Juniper Junos | =15.1-r2 | |
Juniper Junos | =15.1-r3 | |
Juniper Junos | =15.1-r4 | |
Juniper Junos | =15.1-r4-s7 | |
Juniper Junos | =15.1-r4-s8 | |
Juniper Junos | =15.1-r4-s9 | |
Juniper Junos | =15.1-r5 | |
Juniper Junos | =15.1-r5-s1 | |
Juniper Junos | =15.1-r5-s3 | |
Juniper Junos | =15.1-r5-s5 | |
Juniper Junos | =15.1-r5-s6 | |
Juniper Junos | =15.1-r6 | |
Juniper Junos | =15.1-r6-s1 | |
Juniper Junos | =15.1-r6-s2 | |
Juniper Junos | =15.1-r6-s3 | |
Juniper Junos | =15.1-r6-s4 | |
Juniper Junos | =15.1-r6-s6 | |
Juniper Junos | =15.1-r7 | |
Juniper Junos | =15.1-r7-s1 | |
Juniper Junos | =15.1-r7-s2 | |
Juniper Junos | =15.1-r7-s3 | |
Juniper Junos | =15.1-r7-s4 | |
Juniper Junos | =15.1-r7-s5 | |
Juniper Junos | =15.1-r7-s6 | |
Juniper Junos | =15.1-r7-s7 | |
Juniper Junos | =15.1-r7-s8 | |
Juniper Junos | =16.1-r1 | |
Juniper Junos | =16.1-r2 | |
Juniper Junos | =16.1-r3 | |
Juniper Junos | =16.1-r3-s10 | |
Juniper Junos | =16.1-r3-s11 | |
Juniper Junos | =16.1-r3-s8 | |
Juniper Junos | =16.1-r4 | |
Juniper Junos | =16.1-r4-s12 | |
Juniper Junos | =16.1-r4-s2 | |
Juniper Junos | =16.1-r4-s3 | |
Juniper Junos | =16.1-r4-s4 | |
Juniper Junos | =16.1-r4-s6 | |
Juniper Junos | =16.1-r4-s8 | |
Juniper Junos | =16.1-r4-s9 | |
Juniper Junos | =16.1-r5 | |
Juniper Junos | =16.1-r5-s4 | |
Juniper Junos | =16.1-r6 | |
Juniper Junos | =16.1-r6-s1 | |
Juniper Junos | =16.1-r6-s3 | |
Juniper Junos | =16.1-r6-s4 | |
Juniper Junos | =16.1-r6-s6 | |
Juniper Junos | =16.1-r7 | |
Juniper Junos | =16.1-r7-s2 | |
Juniper Junos | =16.1-r7-s3 | |
Juniper Junos | =16.1-r7-s4 | |
Juniper Junos | =16.1-r7-s5 | |
Juniper Junos | =16.1-r7-s6 | |
Juniper Junos | =16.1-r7-s7 | |
Juniper Junos | =16.1-r7-s8 | |
Juniper Junos | =16.2-r1 | |
Juniper Junos | =16.2-r1-s6 | |
Juniper Junos | =16.2-r2 | |
Juniper Junos | =16.2-r2-s1 | |
Juniper Junos | =16.2-r2-s10 | |
Juniper Junos | =16.2-r2-s2 | |
Juniper Junos | =16.2-r2-s5 | |
Juniper Junos | =16.2-r2-s6 | |
Juniper Junos | =16.2-r2-s7 | |
Juniper Junos | =16.2-r2-s8 | |
Juniper Junos | =16.2-r2-s9 | |
Juniper Junos | =16.2-r3 | |
Juniper Junos | =17.1-r1 | |
Juniper Junos | =17.1-r1-s7 | |
Juniper Junos | =17.1-r2 | |
Juniper Junos | =17.1-r2-s1 | |
Juniper Junos | =17.1-r2-s10 | |
Juniper Junos | =17.1-r2-s11 | |
Juniper Junos | =17.1-r2-s2 | |
Juniper Junos | =17.1-r2-s3 | |
Juniper Junos | =17.1-r2-s4 | |
Juniper Junos | =17.1-r2-s5 | |
Juniper Junos | =17.1-r2-s6 | |
Juniper Junos | =17.1-r2-s7 | |
Juniper Junos | =17.1-r2-s8 | |
Juniper Junos | =17.1-r2-s9 | |
Juniper Junos | =17.1-r3 | |
Juniper Junos | =17.1-r3-s1 | |
Juniper Junos | =17.1-r3-s2 | |
Juniper Junos | =17.1-r3-s3 | |
Juniper Junos | =17.2-r1 | |
Juniper Junos | =17.2-r1-s1 | |
Juniper Junos | =17.2-r1-s2 | |
Juniper Junos | =17.2-r1-s3 | |
Juniper Junos | =17.2-r1-s4 | |
Juniper Junos | =17.2-r1-s5 | |
Juniper Junos | =17.2-r1-s6 | |
Juniper Junos | =17.2-r1-s7 | |
Juniper Junos | =17.2-r1-s8 | |
Juniper Junos | =17.2-r2 | |
Juniper Junos | =17.2-r2-s11 | |
Juniper Junos | =17.2-r2-s4 | |
Juniper Junos | =17.2-r2-s6 | |
Juniper Junos | =17.2-r2-s7 | |
Juniper Junos | =17.2-r3 | |
Juniper Junos | =17.2-r3-s1 | |
Juniper Junos | =17.2-r3-s2 | |
Juniper Junos | =17.2-r3-s3 | |
Juniper Junos | =17.2-r3-s4 | |
Juniper Junos | =17.3-r1 | |
Juniper Junos | =17.3-r1-s1 | |
Juniper Junos | =17.3-r1-s4 | |
Juniper Junos | =17.3-r2 | |
Juniper Junos | =17.3-r2-s1 | |
Juniper Junos | =17.3-r2-s2 | |
Juniper Junos | =17.3-r2-s3 | |
Juniper Junos | =17.3-r2-s4 | |
Juniper Junos | =17.3-r2-s5 | |
Juniper Junos | =17.3-r3 | |
Juniper Junos | =17.3-r3 | |
Juniper Junos | =17.3-r3-s1 | |
Juniper Junos | =17.3-r3-s10 | |
Juniper Junos | =17.3-r3-s11 | |
Juniper Junos | =17.3-r3-s2 | |
Juniper Junos | =17.3-r3-s3 | |
Juniper Junos | =17.3-r3-s4 | |
Juniper Junos | =17.3-r3-s5 | |
Juniper Junos | =17.3-r3-s6 | |
Juniper Junos | =17.3-r3-s7 | |
Juniper Junos | =17.3-r3-s8 | |
Juniper Junos | =17.3-r3-s9 | |
Juniper Junos | =18.1 | |
Juniper Junos | =18.1-r1 | |
Juniper Junos | =18.1-r2 | |
Juniper Junos | =18.1-r2-s1 | |
Juniper Junos | =18.1-r2-s2 | |
Juniper Junos | =18.1-r2-s4 | |
Juniper Junos | =18.1-r3 | |
Juniper Junos | =18.1-r3-s1 | |
Juniper Junos | =18.1-r3-s10 | |
Juniper Junos | =18.1-r3-s11 | |
Juniper Junos | =18.1-r3-s12 | |
Juniper Junos | =18.1-r3-s2 | |
Juniper Junos | =18.1-r3-s3 | |
Juniper Junos | =18.1-r3-s4 | |
Juniper Junos | =18.1-r3-s5 | |
Juniper Junos | =18.1-r3-s6 | |
Juniper Junos | =18.1-r3-s7 | |
Juniper Junos | =18.1-r3-s8 | |
Juniper Junos | =18.1-r3-s9 | |
Juniper Junos | =18.2-r1 | |
Juniper Junos | =18.2-r1-s2 | |
Juniper Junos | =18.2-r1-s3 | |
Juniper Junos | =18.2-r1-s4 | |
Juniper Junos | =18.2-r1-s5 | |
Juniper Junos | =18.2-r2 | |
Juniper Junos | =18.2-r2-s1 | |
Juniper Junos | =18.2-r2-s2 | |
Juniper Junos | =18.2-r2-s3 | |
Juniper Junos | =18.2-r2-s4 | |
Juniper Junos | =18.2-r2-s5 | |
Juniper Junos | =18.2-r2-s6 | |
Juniper Junos | =18.2-r2-s7 | |
Juniper Junos | =18.2-r3 | |
Juniper Junos | =18.2-r3-s1 | |
Juniper Junos | =18.2-r3-s2 | |
Juniper Junos | =18.2-r3-s3 | |
Juniper Junos | =18.2-r3-s4 | |
Juniper Junos | =18.2-r3-s5 | |
Juniper Junos | =18.2-r3-s6 | |
Juniper Junos | =18.2-r3-s7 | |
Juniper Junos | =18.3 | |
Juniper Junos | =18.3-r1 | |
Juniper Junos | =18.3-r1-s1 | |
Juniper Junos | =18.3-r1-s2 | |
Juniper Junos | =18.3-r1-s3 | |
Juniper Junos | =18.3-r1-s4 | |
Juniper Junos | =18.3-r1-s5 | |
Juniper Junos | =18.3-r1-s6 | |
Juniper Junos | =18.3-r2 | |
Juniper Junos | =18.3-r2-s1 | |
Juniper Junos | =18.3-r2-s2 | |
Juniper Junos | =18.3-r2-s3 | |
Juniper Junos | =18.3-r2-s4 | |
Juniper Junos | =18.3-r3 | |
Juniper Junos | =18.3-r3-s1 | |
Juniper Junos | =18.3-r3-s2 | |
Juniper Junos | =18.3-r3-s3 | |
Juniper Junos | =18.3-r3-s4 | |
Juniper Junos | =18.4 | |
Juniper Junos | =18.4-r1 | |
Juniper Junos | =18.4-r1-s1 | |
Juniper Junos | =18.4-r1-s2 | |
Juniper Junos | =18.4-r1-s3 | |
Juniper Junos | =18.4-r1-s4 | |
Juniper Junos | =18.4-r1-s5 | |
Juniper Junos | =18.4-r1-s6 | |
Juniper Junos | =18.4-r1-s7 | |
Juniper Junos | =18.4-r2 | |
Juniper Junos | =18.4-r2-s1 | |
Juniper Junos | =18.4-r2-s2 | |
Juniper Junos | =18.4-r2-s3 | |
Juniper Junos | =18.4-r2-s4 | |
Juniper Junos | =18.4-r2-s5 | |
Juniper Junos | =18.4-r2-s6 | |
Juniper Junos | =18.4-r2-s7 | |
Juniper Junos | =18.4-r3 | |
Juniper Junos | =18.4-r3-s1 | |
Juniper Junos | =18.4-r3-s2 | |
Juniper Junos | =18.4-r3-s3 | |
Juniper Junos | =18.4-r3-s4 | |
Juniper Junos | =18.4-r3-s5 | |
Juniper Junos | =18.4-r3-s6 | |
Juniper Junos | =18.4-r3-s7 | |
Juniper Junos | =18.4-r3-s8 | |
Juniper Junos | =19.1 | |
Juniper Junos | =19.1-r1 | |
Juniper Junos | =19.1-r1-s1 | |
Juniper Junos | =19.1-r1-s2 | |
Juniper Junos | =19.1-r1-s3 | |
Juniper Junos | =19.1-r1-s4 | |
Juniper Junos | =19.1-r1-s5 | |
Juniper Junos | =19.1-r1-s6 | |
Juniper Junos | =19.1-r2 | |
Juniper Junos | =19.1-r2-s1 | |
Juniper Junos | =19.1-r2-s2 | |
Juniper Junos | =19.1-r3 | |
Juniper Junos | =19.1-r3-s1 | |
Juniper Junos | =19.1-r3-s2 | |
Juniper Junos | =19.1-r3-s3 | |
Juniper Junos | =19.1-r3-s4 | |
Juniper Junos | =19.1-r3-s5 | |
Juniper Junos | =19.2 | |
Juniper Junos | =19.2-r1 | |
Juniper Junos | =19.2-r1-s1 | |
Juniper Junos | =19.2-r1-s2 | |
Juniper Junos | =19.2-r1-s3 | |
Juniper Junos | =19.2-r1-s4 | |
Juniper Junos | =19.2-r1-s5 | |
Juniper Junos | =19.2-r1-s6 | |
Juniper Junos | =19.2-r2 | |
Juniper Junos | =19.2-r2-s1 | |
Juniper Junos | =19.2-r3 | |
Juniper Junos | =19.2-r3-s1 | |
Juniper Junos | =19.2-r3-s2 | |
Juniper Junos | =19.3 | |
Juniper Junos | =19.3-r1 | |
Juniper Junos | =19.3-r1-s1 | |
Juniper Junos | =19.3-r2 | |
Juniper Junos | =19.3-r2-s1 | |
Juniper Junos | =19.3-r2-s2 | |
Juniper Junos | =19.3-r2-s3 | |
Juniper Junos | =19.3-r2-s4 | |
Juniper Junos | =19.3-r2-s5 | |
Juniper Junos | =19.3-r2-s6 | |
Juniper Junos | =19.3-r3 | |
Juniper Junos | =19.3-r3-s1 | |
Juniper Junos | =19.3-r3-s2 | |
Juniper Junos | =19.4-r1 | |
Juniper Junos | =19.4-r1-s1 | |
Juniper Junos | =19.4-r1-s2 | |
Juniper Junos | =19.4-r1-s3 | |
Juniper Junos | =19.4-r1-s4 | |
Juniper Junos | =19.4-r2 | |
Juniper Junos | =19.4-r2-s1 | |
Juniper Junos | =19.4-r2-s2 | |
Juniper Junos | =19.4-r2-s3 | |
Juniper Junos | =19.4-r3 | |
Juniper Junos | =19.4-r3-s1 | |
Juniper Junos | =19.4-r3-s2 | |
Juniper Junos | =19.4-r3-s3 | |
Juniper Junos | =19.4-r3-s4 | |
Juniper Junos | =20.1-r1 | |
Juniper Junos | =20.1-r1-s1 | |
Juniper Junos | =20.1-r1-s2 | |
Juniper Junos | =20.1-r1-s3 | |
Juniper Junos | =20.1-r1-s4 | |
Juniper Junos | =20.1-r2 | |
Juniper Junos | =20.1-r2-s1 | |
Juniper Junos | =20.1-r3 | |
Juniper Junos | =20.2-r1 | |
Juniper Junos | =20.2-r1-s1 | |
Juniper Junos | =20.2-r1-s2 | |
Juniper Junos | =20.2-r1-s3 | |
Juniper Junos | =20.2-r2 | |
Juniper Junos | =20.2-r2-s1 | |
Juniper Junos | =20.2-r2-s2 | |
Juniper Junos | =20.2-r2-s3 | |
Juniper Junos | =20.2-r3 | |
Juniper Junos | =20.2-r3-s1 | |
Juniper Junos | =20.3-r1 | |
Juniper Junos | =20.3-r1-s1 | |
Juniper Junos | =20.3-r2 | |
Juniper Junos | =20.4-r1 | |
Juniper Junos | =20.4-r1-s1 | |
Juniper Junos | =21.1-r1 | |
Juniper Junos | =21.2-r1 |
The following software releases have been updated to resolve this specific issue: 12.3R12-S19, 15.1R7-S10, 17.3R3-S12, 18.1R3-S13, 18.3R3-S5, 18.4R2-S9, 18.4R3-S9, 19.1R3-S6, 19.2R1-S7, 19.2R3-S3, 19.3R2-S7, 19.3R3-S3, 19.4R3-S5, 20.1R2-S2, 20.1R3-S1, 20.2R3-S2, 20.3R3, 20.4R2-S1, 20.4R3, 21.1R1-S1, 21.1R2, 21.2R1-S1, 21.2R2, 21.3R1, and all subsequent releases.
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CVE-2021-0283 is classified with a High severity score due to its potential to cause Denial of Service (DoS).
To fix CVE-2021-0283, it is recommended to apply the latest firmware updates or patches provided by Juniper Networks for affected Junos OS versions.
CVE-2021-0283 affects multiple versions including 12.3, 15.1, and 16.x through 21.x, specifically those listed in the vulnerability advisories.
The attack vector for CVE-2021-0283 involves sending specific sequences of packets to devices running affected versions of Junos OS.
Yes, CVE-2021-0283 can be exploited remotely, allowing attackers to initiate Denial of Service attacks without physical access to the affected device.