CVE-2022-22195

Junos OS Evolved: Specific packets reaching the RE lead to a counter overflow and eventually a crash

Description

An Improper Update of Reference Count vulnerability in the kernel of Juniper Networks Junos OS Evolved allows an unauthenticated, network-based attacker to trigger a counter overflow, eventually causing a Denial of Service (DoS). This issue affects Juniper Networks Junos OS Evolved: All versions prior to 20.4R3-S1-EVO; 21.1 versions prior to 21.1R3-EVO; 21.2 versions prior to 21.2R3-EVO; 21.3 versions prior to 21.3R2-EVO. This issue does not affect Juniper Networks Junos OS.

Remediation

Solution:

  • The following software releases have been updated to resolve this specific issue: 20.4R3-S1-EVO, 21.1R3-EVO, 21.2R3-EVO, 21.3R2-EVO, 21.4R1-EVO, and all subsequent releases.

Workaround:

  • There are no viable workarounds for this issue. To reduce the risk of exploitation of this issue, use access lists or firewall filters to limit access to only trusted networks, hosts and users.

Category

7.5
CVSS
Severity: High
CVSS 3.1 •
CVSS 2.0 •
EPSS 0.63%
Vendor Advisory juniper.net
Affected: Juniper Networks Junos OS Evolved
Affected: Juniper Networks Junos OS
Published at:
Updated at:

References

Link Tags
https://kb.juniper.net/JSA69508 vendor advisory

Frequently Asked Questions

What is the severity of CVE-2022-22195?
CVE-2022-22195 has been scored as a high severity vulnerability.
How to fix CVE-2022-22195?
To fix CVE-2022-22195: The following software releases have been updated to resolve this specific issue: 20.4R3-S1-EVO, 21.1R3-EVO, 21.2R3-EVO, 21.3R2-EVO, 21.4R1-EVO, and all subsequent releases.
Is CVE-2022-22195 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2022-22195 is being actively exploited. According to its EPSS score, there is a ~1% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2022-22195?
CVE-2022-22195 affects Juniper Networks Junos OS Evolved, Juniper Networks Junos OS.
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