|CVSS Meta Temp Score|
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|CTI Interest Score|
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A vulnerability, which was classified as critical, was found in Juniper Junos (Router Operating System) (version unknown). Affected is an unknown code block of the component jdhcpd. The manipulation with an unknown input leads to a denial of service vulnerability. CWE is classifying the issue as CWE-404. This is going to have an impact on availability. CVE summarizes:
On Juniper Networks Junos OS devices configured with DHCPv6 relay enabled, receipt of a specific DHCPv6 packet might crash the jdhcpd daemon. The jdhcpd daemon automatically restarts without intervention, but continuous receipt of specific crafted DHCP messages will repeatedly crash jdhcpd, leading to an extended Denial of Service (DoS) condition. Only DHCPv6 packet can trigger this issue. DHCPv4 packet cannot trigger this issue. This issue affects Juniper Networks Junos OS: 17.3 versions prior to 17.3R3-S9; 17.4 versions prior to 17.4R2-S11, 17.4R3-S2, 17.4R3-S3; 18.1 versions prior to 18.1R3-S11; 18.2 versions prior to 18.2R3-S5; 18.3 versions prior to 18.3R2-S4, 18.3R3-S3; 18.4 versions prior to 18.4R2-S5, 18.4R3-S4; 19.1 versions prior to 19.1R2-S2, 19.1R3-S2; 19.2 versions prior to 19.2R1-S5, 19.2R2-S1, 19.2R3; 19.3 versions prior to 19.3R2-S4, 19.3R2-S4, 19.3R3; 19.4 versions prior to 19.4R1-S3, 19.4R2-S1, 19.4R3; 20.1 versions prior to 20.1R1-S3, 20.1R2.
The weakness was shared 10/17/2020 as JSA11069. The advisory is shared for download at kb.juniper.net. This vulnerability is traded as CVE-2020-1672 since 11/04/2019. The exploitability is told to be easy. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. 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 11/20/2020). The MITRE ATT&CK project declares the attack technique as T1499.
Upgrading eliminates this vulnerability.
CVSSv3VulDB 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: 🔍
NVD Base Score: 🔒
ExploitingClass: Denial of service
Status: Not defined
Price Prediction: 🔍
Current Price Estimation: 🔒
Threat IntelligenceThreat: 🔍
0-Day Time: 🔒
Timeline11/04/2019 CVE assigned
10/17/2020 +347 days Advisory disclosed
10/17/2020 +0 days VulDB entry created
11/20/2020 +34 days VulDB last update
CVE: CVE-2020-1672 (🔒)
EntryCreated: 10/17/2020 10:59 AM
Updated: 11/20/2020 08:47 PM
Changes: (7) vulnerability_cvss2_nvd_av vulnerability_cvss2_nvd_ac vulnerability_cvss2_nvd_au vulnerability_cvss2_nvd_ci vulnerability_cvss2_nvd_ii vulnerability_cvss2_nvd_ai source_cve_cna
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