2021-0283 | Juniper Junos OS Transit Traffic denial of service (JSA11200)
|CVSS Meta Temp Score||Current Exploit Price (≈)||CTI Interest Score|
A vulnerability has been found in Juniper Junos OS (Router Operating System) (the affected version is unknown) and classified as critical. This vulnerability affects some unknown processing of the component Transit Traffic Handler. The manipulation with an unknown input leads to a denial of service vulnerability. The CWE definition for the vulnerability is CWE-404. As an impact it is known to affect availability. CVE summarizes:
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: 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 version 17.3R1 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 ot 18.4R3-S9; 19.1 versions prior to 19.1R3-S6; 19.2 versions prior to 19.2R3-S3; 19.3 versions prior to 19.3R3-S3; 19.4 versions prior to 19.4R1-S4, 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 21.2R2.
The weakness was shared 07/16/2021 as JSA11200. The advisory is shared for download at kb.juniper.net. This vulnerability was named CVE-2021-0283 since 10/27/2020. The exploitation appears to be easy. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. There are neither technical details nor an exploit publicly available. The current price for an exploit might be approx. USD $0-$5k (estimation calculated on 07/19/2021). The MITRE ATT&CK project declares the attack technique as T1499.
Upgrading eliminates this vulnerability.
VulDB Meta Base Score: 7.5
VulDB Meta Temp Score: 7.2
VulDB Base Score: 7.5
VulDB Temp Score: 7.2
VulDB Vector: 🔒
VulDB Reliability: 🔍
VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍
Class: Denial of service
Status: Not defined
Price Prediction: 🔍
Current Price Estimation: 🔒
Active Actors: 🔍
Active APT Groups: 🔍Recommended: Upgrade
0-Day Time: 🔒
10/27/2020 CVE assigned
07/16/2021 +261 days Advisory disclosed
07/16/2021 +0 days VulDB entry created
07/19/2021 +3 days VulDB last updateVendor: https://www.juniper.net/
CVE: CVE-2021-0283 (🔒)
Created: 07/16/2021 09:18
Updated: 07/19/2021 09:11
Changes: (1) source_cve_cna
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