Sign-up

ID

VAR-202104-0569


CVE

CVE-2021-0244


TITLE

Juniper Networks Junos OS Competitive conditional vulnerability

Trust: 0.6

sources: CNNVD: CNNVD-202104-1036

DESCRIPTION

A signal handler race condition exists in the Layer 2 Address Learning Daemon (L2ALD) of Juniper Networks Junos OS due to the absence of a specific protection mechanism to avoid a race condition which may allow an attacker to bypass the storm-control feature on devices. This issue is a corner case and only occurs during specific actions taken by an administrator of a device under certain specifics actions which triggers the event. The event occurs less frequently on devices which are not configured with Virtual Chassis configurations, and more frequently on devices configured in Virtual Chassis configurations. This issue is not specific to any particular Junos OS platform. An Indicator of Compromise (IoC) may be seen by reviewing log files for the following error message seen by executing the following show statement: show log messages | grep storm Result to look for: /kernel: GENCFG: op 58 (Storm Control Blob) failed; err 1 (Unknown) This issue affects: Juniper Networks Junos OS: 14.1X53 versions prior to 14.1X53-D49 on EX Series; 15.1 versions prior to 15.1R7-S6; 15.1X49 versions prior to 15.1X49-D191, 15.1X49-D200 on SRX Series; 16.1 versions prior to 16.1R7-S7; 16.2 versions prior to 16.2R2-S11, 16.2R3; 17.1 versions prior to 17.1R2-S11, 17.1R3; 17.2 versions prior to 17.2R2-S8, 17.2R3-S3; 17.3 versions prior to 17.3R2-S5, 17.3R3-S7; 17.4 versions prior to 17.4R2-S9, 17.4R3; 18.1 versions prior to 18.1R3-S5; 18.2 versions prior to 18.2R2-S6, 18.2R3; 18.3 versions prior to 18.3R1-S7, 18.3R2-S3, 18.3R3; 18.4 versions prior to 18.4R1-S5, 18.4R2; 19.1 versions prior to 19.1R1-S4, 19.1R2

Trust: 1.08

sources: NVD: CVE-2021-0244 // VULHUB: VHN-372146 // VULMON: CVE-2021-0244

AFFECTED PRODUCTS

vendor:junipermodel:junosscope:eqversion:17.3

Trust: 1.0

vendor:junipermodel:junosscope:eqversion:18.1

Trust: 1.0

vendor:junipermodel:junosscope:eqversion:17.1

Trust: 1.0

vendor:junipermodel:junosscope:eqversion:17.4

Trust: 1.0

vendor:junipermodel:junosscope:eqversion:15.1

Trust: 1.0

vendor:junipermodel:junosscope:eqversion:18.2

Trust: 1.0

vendor:junipermodel:junosscope:eqversion:14.1x53

Trust: 1.0

vendor:junipermodel:junosscope:eqversion:16.2

Trust: 1.0

vendor:junipermodel:junosscope:eqversion:19.1

Trust: 1.0

vendor:junipermodel:junosscope:eqversion:15.1x49

Trust: 1.0

vendor:junipermodel:junosscope:eqversion:16.1

Trust: 1.0

vendor:junipermodel:junosscope:eqversion:17.2

Trust: 1.0

vendor:junipermodel:junosscope:eqversion:18.3

Trust: 1.0

sources: NVD: CVE-2021-0244

CVSS

SEVERITY

CVSSV2

CVSSV3

nvd@nist.gov: CVE-2021-0244
value: MEDIUM

Trust: 1.0

sirt@juniper.net: CVE-2021-0244
value: HIGH

Trust: 1.0

CNNVD: CNNVD-202104-1036
value: HIGH

Trust: 0.6

VULHUB: VHN-372146
value: MEDIUM

Trust: 0.1

VULMON: CVE-2021-0244
value: MEDIUM

Trust: 0.1

nvd@nist.gov: CVE-2021-0244
severity: MEDIUM
baseScore: 4.3
vectorString: AV:N/AC:M/AU:N/C:N/I:N/A:P
accessVector: NETWORK
accessComplexity: MEDIUM
authentication: NONE
confidentialityImpact: NONE
integrityImpact: NONE
availabilityImpact: PARTIAL
exploitabilityScore: 8.6
impactScore: 2.9
acInsufInfo: NONE
obtainAllPrivilege: NONE
obtainUserPrivilege: NONE
obtainOtherPrivilege: NONE
userInteractionRequired: NONE
version: 2.0

Trust: 1.1

VULHUB: VHN-372146
severity: MEDIUM
baseScore: 4.3
vectorString: AV:N/AC:M/AU:N/C:N/I:N/A:P
accessVector: NETWORK
accessComplexity: MEDIUM
authentication: NONE
confidentialityImpact: NONE
integrityImpact: NONE
availabilityImpact: PARTIAL
exploitabilityScore: 8.6
impactScore: 2.9
acInsufInfo: NONE
obtainAllPrivilege: NONE
obtainUserPrivilege: NONE
obtainOtherPrivilege: NONE
userInteractionRequired: NONE
version: 2.0

Trust: 0.1

sirt@juniper.net: CVE-2021-0244
baseSeverity: HIGH
baseScore: 7.4
vectorString: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:N/I:N/A:H
attackVector: NETWORK
attackComplexity: LOW
privilegesRequired: NONE
userInteraction: REQUIRED
scope: CHANGED
confidentialityImpact: NONE
integrityImpact: NONE
availabilityImpact: HIGH
exploitabilityScore: 2.8
impactScore: 4.0
version: 3.1

Trust: 1.0

sources: VULHUB: VHN-372146 // VULMON: CVE-2021-0244 // CNNVD: CNNVD-202104-1036 // NVD: CVE-2021-0244 // NVD: CVE-2021-0244

PROBLEMTYPE DATA

problemtype:CWE-362

Trust: 1.1

sources: VULHUB: VHN-372146 // NVD: CVE-2021-0244

THREAT TYPE

remote

Trust: 0.6

sources: CNNVD: CNNVD-202104-1036

TYPE

competition condition problem

Trust: 0.6

sources: CNNVD: CNNVD-202104-1036

PATCH

title:Juniper Networks Junos OS Repair measures for the competition condition problem loopholeurl:http://www.cnnvd.org.cn/web/xxk/bdxqById.tag?id=148821

Trust: 0.6

sources: CNNVD: CNNVD-202104-1036

EXTERNAL IDS

db:JUNIPERid:JSA11137

Trust: 1.8

db:NVDid:CVE-2021-0244

Trust: 1.8

db:CNNVDid:CNNVD-202104-1036

Trust: 0.6

db:VULHUBid:VHN-372146

Trust: 0.1

db:VULMONid:CVE-2021-0244

Trust: 0.1

sources: VULHUB: VHN-372146 // VULMON: CVE-2021-0244 // CNNVD: CNNVD-202104-1036 // NVD: CVE-2021-0244

REFERENCES

url:https://kb.juniper.net/jsa11137

Trust: 1.8

url:https://vigilance.fr/vulnerability/junos-os-multiple-vulnerabilities-35081

Trust: 0.6

url:https://nvd.nist.gov/vuln/detail/cve-2021-0244

Trust: 0.6

url:https://cwe.mitre.org/data/definitions/362.html

Trust: 0.1

url:https://nvd.nist.gov

Trust: 0.1

sources: VULHUB: VHN-372146 // VULMON: CVE-2021-0244 // CNNVD: CNNVD-202104-1036 // NVD: CVE-2021-0244

SOURCES

db:VULHUBid:VHN-372146
db:VULMONid:CVE-2021-0244
db:CNNVDid:CNNVD-202104-1036
db:NVDid:CVE-2021-0244

LAST UPDATE DATE

2024-08-14T14:44:27.212000+00:00


SOURCES UPDATE DATE

db:VULHUBid:VHN-372146date:2021-04-28T00:00:00
db:VULMONid:CVE-2021-0244date:2021-04-28T00:00:00
db:CNNVDid:CNNVD-202104-1036date:2021-04-29T00:00:00
db:NVDid:CVE-2021-0244date:2021-04-28T01:02:46.037

SOURCES RELEASE DATE

db:VULHUBid:VHN-372146date:2021-04-22T00:00:00
db:VULMONid:CVE-2021-0244date:2021-04-22T00:00:00
db:CNNVDid:CNNVD-202104-1036date:2021-04-14T00:00:00
db:NVDid:CVE-2021-0244date:2021-04-22T20:15:09.127