CVE-2021-0233: Junos OS: ACX500 Series, ACX4000 Series: Denial of Service due to FFEB crash while processing high rate of specific packets.
First published: Wed Apr 14 2021(Updated: )
A vulnerability in Juniper Networks Junos OS ACX500 Series, ACX4000 Series, may allow an attacker to cause a Denial of Service (DoS) by sending a high rate of specific packets to the device, resulting in a Forwarding Engine Board (FFEB) crash. Continued receipt of these packets will sustain the Denial of Service (DoS) condition. This issue affects Juniper Networks Junos OS on ACX500 Series, ACX4000 Series: 17.4 versions prior to 17.4R3-S2.
Credit: sirt@juniper.net
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Juniper Junos | =17.4 | |
| Juniper Junos | =17.4-r1 | |
| Juniper Junos | =17.4-r1-s1 | |
| Juniper Junos | =17.4-r1-s2 | |
| Juniper Junos | =17.4-r1-s3 | |
| Juniper Junos | =17.4-r1-s4 | |
| Juniper Junos | =17.4-r1-s5 | |
| Juniper Junos | =17.4-r1-s6 | |
| Juniper Junos | =17.4-r1-s7 | |
| Juniper Junos | =17.4-r2 | |
| Juniper Junos | =17.4-r2-s1 | |
| Juniper Junos | =17.4-r2-s10 | |
| Juniper Junos | =17.4-r2-s11 | |
| Juniper Junos | =17.4-r2-s2 | |
| Juniper Junos | =17.4-r2-s3 | |
| Juniper Junos | =17.4-r2-s4 | |
| Juniper Junos | =17.4-r2-s5 | |
| Juniper Junos | =17.4-r2-s6 | |
| Juniper Junos | =17.4-r2-s7 | |
| Juniper Junos | =17.4-r2-s8 | |
| Juniper Junos | =17.4-r2-s9 | |
| Juniper Junos | =17.4-r3 | |
| Juniper Junos | =17.4-r3-s1 | |
| Juniper ACX4000 | ||
| Juniper ACX500 |
Remedy
The following software releases have been updated to resolve this specific issue: 17.4R3-S2, and all subsequent releases.
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Reference Links
Frequently Asked Questions
What is the severity of CVE-2021-0233?
The severity of CVE-2021-0233 is critical as it can lead to a Denial of Service (DoS) affecting the Junos OS devices.
How do I fix CVE-2021-0233?
To mitigate CVE-2021-0233, upgrade to a patched version of Junos OS that addresses this vulnerability.
What devices are affected by CVE-2021-0233?
CVE-2021-0233 affects Juniper Networks ACX500 and ACX4000 Series devices running specific versions of Junos OS.
What is the impact of CVE-2021-0233?
CVE-2021-0233 allows attackers to crash the Forwarding Engine Board, resulting in potential service interruptions.
Can CVE-2021-0233 be exploited remotely?
Yes, CVE-2021-0233 can be exploited remotely by sending specially crafted packets to vulnerable devices.
- agent/weakness
- agent/type
- collector/nvd-index
- agent/software-canonical-lookup-request
- collector/mitre-cve
- source/MITRE
- agent/title
- agent/last-modified-date
- agent/references
- agent/remedy
- agent/author
- agent/severity
- agent/softwarecombine
- agent/description
- agent/first-publish-date
- agent/event
- agent/tags
- agent/source
- vendor/juniper
- canonical/juniper junos
- version/juniper junos/17.4
- version/juniper junos/17.4-r1
- version/juniper junos/17.4-r1-s1
- version/juniper junos/17.4-r1-s2
- version/juniper junos/17.4-r1-s3
- version/juniper junos/17.4-r1-s4
- version/juniper junos/17.4-r1-s5
- version/juniper junos/17.4-r1-s6
- version/juniper junos/17.4-r1-s7
- version/juniper junos/17.4-r2
- version/juniper junos/17.4-r2-s1
- version/juniper junos/17.4-r2-s10
- version/juniper junos/17.4-r2-s11
- version/juniper junos/17.4-r2-s2
- version/juniper junos/17.4-r2-s3
- version/juniper junos/17.4-r2-s4
- version/juniper junos/17.4-r2-s5
- version/juniper junos/17.4-r2-s6
- version/juniper junos/17.4-r2-s7
- version/juniper junos/17.4-r2-s8
- version/juniper junos/17.4-r2-s9
- version/juniper junos/17.4-r3
- version/juniper junos/17.4-r3-s1
- canonical/juniper acx4000
- canonical/juniper acx500