CVE-2021-0244 (GCVE-0-2021-0244)

Vulnerability from cvelistv5 – Published: 2021-04-22 19:37 – Updated: 2024-09-16 19:56
VLAI?
Title
Junos OS: A race condition in the storm control profile may allow an attacker to cause a Denial of Service condition
Summary
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.
Severity ?
7.4 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:N/I:N/A:H
CWE
  • 364 - Signal Handler Race Condition
  • Denial of Service (DoS)
  • Absence of a specific protection mechanism to avoid a race condition.
Assigner
References
Impacted products
Vendor Product Version
Juniper Networks Junos OS Affected: 14.1X53 , < 14.1X53-D49 (custom)
Create a notification for this product.
    Juniper Networks Junos OS Affected: 15.1 , < 15.1R7-S6 (custom)
Affected: 16.1 , < 16.1R7-S7 (custom)
Affected: 16.2 , < 16.2R2-S11, 16.2R3 (custom)
Affected: 17.1 , < 17.1R2-S11, 17.1R3 (custom)
Affected: 17.2 , < 17.2R2-S8, 17.2R3-S3 (custom)
Affected: 17.3 , < 17.3R2-S5, 17.3R3-S7 (custom)
Affected: 17.4 , < 17.4R2-S9, 17.4R3 (custom)
Affected: 18.1 , < 18.1R3-S5 (custom)
Affected: 18.2 , < 18.2R2-S6, 18.2R3 (custom)
Affected: 18.3 , < 18.3R1-S7, 18.3R2-S3, 18.3R3 (custom)
Affected: 18.4 , < 18.4R1-S5, 18.4R2 (custom)
Affected: 19.1 , < 19.1R1-S4, 19.1R2 (custom)
Create a notification for this product.
    Juniper Networks Junos OS Affected: 15.1X49 , < 15.1X49-D191, 15.1X49-D200 (custom)
Create a notification for this product.
Show details on NVD website
To clipboard 

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  "cveMetadata": {
    "assignerOrgId": "8cbe9d5a-a066-4c94-8978-4b15efeae968",
    "assignerShortName": "juniper",
    "cveId": "CVE-2021-0244",
    "datePublished": "2021-04-22T19:37:08.716Z",
    "dateReserved": "2020-10-27T00:00:00.000Z",
    "dateUpdated": "2024-09-16T19:56:59.732Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1"
}


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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



Detection rules are retrieved from Rulezet.