# CVE-2022-22178: Memory corruption in Junos OS

> An unauthenticated attacker can cause a denial of service by sending a specific SIP packet when SIP ALG is enabled on Juniper MX and SRX devices.

- **Severity:** High 7.5 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 19 Jan 2022
- **Updated:** 17 Sep 2024
- **Also known as:** GHSA-pg23-wvf8-rvmv

## What is CVE-2022-22178?

CVE-2022-22178 is a high-severity memory corruption vulnerability in Juniper Junos, published on 19 Jan 2022. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

A Stack-based Buffer Overflow vulnerability in the flow processing daemon (flowd) of Juniper Networks Junos OS on MX Series and SRX series allows an unauthenticated networked attacker to cause a flowd crash and thereby a Denial of Service (DoS). Continued receipt of these specific packets will cause a sustained Denial of Service condition. This issue can be triggered by a specific Session Initiation Protocol (SIP) invite packet if the SIP ALG is enabled. Due to this, the PIC will be rebooted and all traffic that traverses the PIC will be dropped. This issue affects: Juniper Networks Junos OS 20.4 versions prior to 20.4R3-S2; 21.1 versions prior to 21.1R2-S1, 21.1R3; 21.2 versions prior to 21.2R2; 21.3 versions prior to 21.3R2. This issue does not affect Juniper Networks Junos OS versions prior to 20.4R1.

Weakness: CWE-121 (Stack-based Buffer Overflow)

## Which versions are affected by CVE-2022-22178?

It affects 1 product.


Products: Juniper Junos.

## How do I fix CVE-2022-22178?

No fix has been published for CVE-2022-22178 yet. Limit exposure of the affected software until one is available.

## Is CVE-2022-22178 being exploited?

There is no known exploitation of CVE-2022-22178 in the wild and no public exploit code.

## Other vulnerabilities in Juniper Junos

- [CVE-2023-36845](https://insights.sbomify.com/CVE-2023-36845/): Juniper Junos OS EX Series and SRX Series PHP External Variable Modification (critical 9.8, exploited in the wild)
- [CVE-2020-1631](https://insights.sbomify.com/CVE-2020-1631/): Juniper Junos OS Path Traversal (high 8.8, exploited in the wild)
- [CVE-2025-21590](https://insights.sbomify.com/CVE-2025-21590/): Juniper Junos OS Improper Isolation or Compartmentalization (medium 6.7, exploited in the wild)
- [CVE-2023-36851](https://insights.sbomify.com/CVE-2023-36851/): Juniper Junos OS SRX Series Missing Authentication for Critical Function (medium 5.3, exploited in the wild)
- [CVE-2023-36844](https://insights.sbomify.com/CVE-2023-36844/): Juniper Junos OS EX Series PHP External Variable Modification (medium 5.3, exploited in the wild)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2022-22178 and fix it if it is affected.

What it is: CVE-2022-22178 is a high-severity memory corruption vulnerability in Juniper Junos, published on 19 Jan 2022. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2022-22178 in the wild and no public exploit code.

Affected product: Juniper Junos. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2022-22178/ (Markdown: https://insights.sbomify.com/CVE-2022-22178/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2022-22178
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2022-22178
- OSV: https://osv.dev/vulnerability/CVE-2022-22178

---
From sbomify Insights: https://insights.sbomify.com/CVE-2022-22178/
Summaries are generated and may contain mistakes; the official description above is the record.