CVE-2021-0294: Junos OS: QFX5000 Series and EX4600 Series: Enhanced storm control might not work leading to partial Denial of Service
First published: Thu Jul 15 2021(Updated: )
A vulnerability in Juniper Networks Junos OS, which only affects the release 18.4R2-S5, where a function is inconsistently implemented on Juniper Networks Junos QFX5000 Series and EX4600 Series, and if "storm-control enhanced" is configured, can lead to the enhanced storm control filter group not be installed. It will cause storm control not to work hence allowing an attacker to cause high CPU usage or packet loss issues by sending a large amount of broadcast or unknown unicast packets arriving the device. This issue affects Juniper Networks QFX5100, QFX5110, QFX5120, QFX5200, QFX5210, EX4600, and EX4650, and QFX5100 with QFX 5e Series image installed. QFX5130 and QFX5220 are not affected from this issue. This issue affects Juniper Networks Junos OS 18.4R2-S5 on QFX5000 Series and EX4600 Series. No other product or platform is affected by this vulnerability.
Credit: sirt@juniper.net
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Juniper JUNOS | =18.4-r2-s5 | |
| Juniper EX4600 | ||
| Juniper Ex4650 | ||
| Juniper Qfx5100 | ||
| Juniper Qfx5110 | ||
| Juniper Qfx5120 | ||
| Juniper Qfx5200 | ||
| Juniper Qfx5210 |
Remedy
The following software releases has been updated to resolve this specific issue: Junos OS 18.4R2-S6.
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Reference Links
Frequently Asked Questions
What is CVE-2021-0294?
CVE-2021-0294 is a vulnerability in Juniper Networks Junos OS that affects the release 18.4R2-S5.
Which software versions are affected by CVE-2021-0294?
Only the release 18.4R2-S5 of Juniper Networks Junos OS is affected by CVE-2021-0294.
Which series of Juniper Networks devices are affected by CVE-2021-0294?
The vulnerability only affects the Juniper Networks Junos QFX5000 Series and EX4600 Series.
What is the severity of CVE-2021-0294?
The severity of CVE-2021-0294 is medium with a CVSS score of 5.3.
How can I fix CVE-2021-0294?
To fix CVE-2021-0294, update to a version of Juniper Networks Junos OS that is not affected.
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- agent/type
- agent/softwarecombine
- collector/mitre-cve
- source/MITRE
- agent/remedy
- agent/author
- agent/severity
- agent/weakness
- agent/last-modified-date
- agent/title
- agent/references
- agent/tags
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- agent/event
- vendor/juniper
- canonical/juniper junos
- version/juniper junos/18.4-r2-s5
- canonical/juniper ex4600
- canonical/juniper ex4650
- canonical/juniper qfx5100
- canonical/juniper qfx5110
- canonical/juniper qfx5120
- canonical/juniper qfx5200
- canonical/juniper qfx5210