Headline
CVE-2022-22161: 2022-01 Security Bulletin: Junos OS: MX104 might become unresponsive if the out-of-band management port receives a flood of traffic (CVE-2022-22161)
An Uncontrolled Resource Consumption vulnerability in the kernel of Juniper Networks Junos OS allows an unauthenticated network based attacker to cause 100% CPU load and the device to become unresponsive by sending a flood of traffic to the out-of-band management ethernet port. Continued receipted of a flood will create a sustained Denial of Service (DoS) condition. Once the flood subsides the system will recover by itself. An indication that the system is affected by this issue would be that an irq handled by the fman process is shown to be using a high percentage of CPU cycles like in the following example output: user@host> show system processes extensive … PID USERNAME PRI NICE SIZE RES STATE TIME WCPU COMMAND 31 root -84 -187 0K 16K WAIT 22.2H 56939.26% irq96: fman0 This issue affects Juniper Networks Junos OS: All versions prior to 18.3R3-S6; 18.4 versions prior to 18.4R2-S9, 18.4R3-S9; 19.1 versions prior to 19.1R2-S3, 19.1R3-S7; 19.2 versions prior to 19.2R1-S7, 19.2R3-S3; 19.3 versions prior to 19.3R2-S7, 19.3R3-S4; 19.4 versions prior to 19.4R2-S5, 19.4R3-S5; 20.1 versions prior to 20.1R3-S1; 20.2 versions prior to 20.2R3-S2; 20.3 versions prior to 20.3R3-S1; 20.4 versions prior to 20.4R2-S2, 20.4R3; 21.1 versions prior to 21.1R2; 21.2 versions prior to 21.2R1-S1, 21.2R2.
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2022-01 Security Bulletin: Junos OS: MX104 might become unresponsive if the out-of-band management port receives a flood of traffic (CVE-2022-22161)
Article ID: JSA11269 SECURITY_ADVISORIES Last Updated: 12 Jan 2022Version: 1.0 Product Affected:
This issue affects all versions of Junos OS. Affected platforms: MX104.
Problem:
An Uncontrolled Resource Consumption vulnerability in the kernel of Juniper Networks Junos OS allows an unauthenticated network based attacker to cause 100% CPU load and the device to become unresponsive by sending a flood of traffic to the out-of-band management ethernet port.
Continued receipted of a flood will create a sustained Denial of Service (DoS) condition. Once the flood subsides the system will recover by itself.
An indication that the system is affected by this issue would be that an irq handled by the fman process is shown to be using a high percentage of CPU cycles like in the following example output:
user@host> show system processes extensive
...
PID USERNAME PRI NICE SIZE RES STATE TIME WCPU COMMAND
31 root -84 -187 0K 16K WAIT 22.2H 56939.26% irq96: fman0
This issue affects Juniper Networks Junos OS:
- All versions prior to 18.3R3-S6;
- 18.4 versions prior to 18.4R2-S9, 18.4R3-S9;
- 19.1 versions prior to 19.1R2-S3, 19.1R3-S7;
- 19.2 versions prior to 19.2R1-S7, 19.2R3-S3;
- 19.3 versions prior to 19.3R2-S7, 19.3R3-S4;
- 19.4 versions prior to 19.4R2-S5, 19.4R3-S5;
- 20.1 versions prior to 20.1R3-S1;
- 20.2 versions prior to 20.2R3-S2;
- 20.3 versions prior to 20.3R3-S1;
- 20.4 versions prior to 20.4R2-S2, 20.4R3;
- 21.1 versions prior to 21.1R2;
- 21.2 versions prior to 21.2R1-S1, 21.2R2.
Juniper SIRT is not aware of any malicious exploitation of this vulnerability.
This issue was seen during production usage.
This issue has been assigned CVE-2022-22161.
Solution:
The following software releases have been updated to resolve this specific issue: 18.3R3-S6, 18.4R2-S9, 18.4R3-S9, 19.1R2-S3, 19.1R3-S7, 19.2R1-S7, 19.2R3-S3, 19.3R2-S7, 19.3R3-S4, 19.4R2-S5, 19.4R3-S5, 20.1R3-S1, 20.2R3-S2, 20.3R3-S1, 20.4R2-S2, 20.4R3, 21.1R2, 21.2R1-S1, 21.2R2, 21.3R1, and all subsequent releases.
This issue is being tracked as 1585829.
Workaround:
There are no viable workarounds for this issue.
Implementation:
Software releases or updates are available for download at https://support.juniper.net/support/downloads/
Modification History:
2022-01-12: Initial Publication.
CVSS Score:
7.5 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H)
Severity Level:
High
Severity Assessment:
Information for how Juniper Networks uses CVSS can be found at KB 16446 “Common Vulnerability Scoring System (CVSS) and Juniper’s Security Advisories.”
Related Links
- KB16613: Overview of the Juniper Networks SIRT Quarterly Security Bulletin Publication Process
- KB16765: In which releases are vulnerabilities fixed?
- KB16446: Common Vulnerability Scoring System (CVSS) and Juniper’s Security Advisories
- Report a Security Vulnerability - How to Contact the Juniper Networks Security Incident Response Team
- CVE-2022-22161 at cve.org
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