Juniper Junos MACsec Packet protection mechanism

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5.2$0-$5k0.00

A vulnerability was found in Juniper Junos (Router Operating System) (affected version not known) and classified as problematic. Affected by this issue is an unknown function of the component MACsec Packet Handler. The manipulation with an unknown input leads to a privilege escalation vulnerability. Using CWE to declare the problem leads to CWE-693. Impacted is confidentiality, and integrity. CVE summarizes:

Juniper Networks Junos OS and Junos OS Evolved fail to drop/discard delayed MACsec packets (e.g. delayed by more than 2 seconds). Per the specification, called the "bounded receive delay", there should be no replies to delayed MACsec packets. Any MACsec traffic delayed more than 2 seconds should be dropped and late drop counters should increment. Without MACsec delay protection, an attacker could exploit the delay to spoof or decrypt packets. This issue affects: Juniper Networks Junos OS: 16.1 versions prior to 16.1R7-S8; 17.2 versions prior to 17.2R3-S4; 17.3 versions prior to 17.3R3-S8, 17.3R3-S9; 17.4 versions prior to 17.4R2-S11, 17.4R3-S2; 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 18.4R1-S7, 18.4R2-S5, 18.4R3-S3; 19.1 versions prior to 19.1R3-S2; 19.2 versions prior to 19.2R1-S5, 19.2R3; 19.3 versions prior to 19.3R2-S3, 19.3R3; 19.4 versions prior to 19.4R1-S2, 19.4R2-S1, 19.4R3; 20.1 versions prior to 20.1R1-S2, 20.1R2. Juniper Networks Junos OS Evolved: all versions prior to 19.4R3-EVO; 20.1 versions prior to 20.1R2-EVO. This issue does not affect Junos OS versions prior to 16.1R1.

The weakness was released 10/17/2020 as JSA11071. The advisory is available at kb.juniper.net. This vulnerability is handled as CVE-2020-1674 since 11/04/2019. The exploitation is known to be easy. The attack needs to approached within the local network. No form of authentication is required for exploitation. The technical details are unknown and an exploit is not available. The structure of the vulnerability defines a possible price range of USD $0-$5k at the moment (estimation calculated on 11/20/2020).

Upgrading eliminates this vulnerability.

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VulDB Meta Base Score: 5.4
VulDB Meta Temp Score: 5.2

VulDB Base Score: 5.4
VulDB Temp Score: 5.2
VulDB Vector: 🔒
VulDB Reliability: 🔍

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VulDB Base Score: 🔒
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VulDB Reliability: 🔍

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Exploitinginfoedit

Class: Privilege escalation
CWE: CWE-693
ATT&CK: Unknown

Local: No
Remote: Partially

Availability: 🔒
Status: Not defined

Price Prediction: 🔍
Current Price Estimation: 🔒

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Recommended: Upgrade
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0-Day Time: 🔒

Timelineinfoedit

11/04/2019 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

Sourcesinfoedit

Vendor: https://www.juniper.net/

Advisory: JSA11071
Status: Confirmed
Confirmation: 🔒

CVE: CVE-2020-1674 (🔒)

Entryinfoedit

Created: 10/17/2020 11:01 AM
Updated: 11/20/2020 09:06 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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