# CVE-2020-3639: Denial of service in Snapdragon Auto, Snapdragon Compute, Snapdragon Consumer IOT, Snapdragon Industrial IOT, Snapdragon Mobile, Snapdragon Wearables

> A remote attacker can cause a denial of service via memory overflow or excessive cycles in the SIP sigcomp component of Qualcomm Snapdragon chipsets.

- **Severity:** Critical 9.8 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/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:** 12 Nov 2020
- **Updated:** 4 Aug 2024
- **Also known as:** GHSA-8cxj-w3cq-8934

## What is CVE-2020-3639?

CVE-2020-3639 is a critical denial of service vulnerability in Qualcomm Apq8009 Firmware, published on 12 Nov 2020. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

u'When a non standard SIP sigcomp message is received from the network, then there may be chances of using more UDVM cycle or memory overflow' in Snapdragon Auto, Snapdragon Compute, Snapdragon Consumer IOT, Snapdragon Industrial IOT, Snapdragon Mobile, Snapdragon Wearables in APQ8009, APQ8017, APQ8037, APQ8053, MDM9250, MDM9607, MDM9628, MDM9640, MDM9650, MSM8108, MSM8208, MSM8209, MSM8608, MSM8905, MSM8909, MSM8917, MSM8920, MSM8937, MSM8940, MSM8953, MSM8996AU, QCM4290, QCM6125, QCS410, QCS4290, QCS603, QCS605, QCS610, QCS6125, QM215, QSM8350, SA415M, SA6145P, SA6150P, SA6155P, SA8150P, SA8155, SA8155P, SA8195P, SC7180, SC8180X, SC8180X+SDX55, SC8180XP, SDA429W, SDA640, SDA660, SDA670, SDA845, SDA855, SDM1000, SDM429, SDM429W, SDM439, SDM450, SDM455, SDM630, SDM632, SDM636, SDM640, SDM660, SDM670, SDM710, SDM712, SDM845, SDM850, SDX24, SDX50M, SDX55, SDX55M, SM4125, SM4250, SM4250P, SM6115, SM6115P, SM6125, SM6150, SM6150P, SM6250, SM6250P, SM7125, SM7150, SM7150P, SM7250, SM7250P, SM8150, SM8150P, SM8350, SM8350P, SXR1120, SXR1130

Weakness: CWE-129 (Improper Validation of Array Index)

## Which versions are affected by CVE-2020-3639?

It affects 89 products.


Products: Qualcomm Apq8009 Firmware, Qualcomm Apq8017 Firmware, Qualcomm Apq8037 Firmware, Qualcomm Apq8053 Firmware, Qualcomm Mdm9250 Firmware, Qualcomm Mdm9607 Firmware, Qualcomm Mdm9628 Firmware, Qualcomm Mdm9640 Firmware, Qualcomm Mdm9650 Firmware, Qualcomm Msm8108 Firmware, Qualcomm Msm8208 Firmware, Qualcomm Msm8209 Firmware, Qualcomm Msm8608 Firmware, Qualcomm Msm8905 Firmware, Qualcomm Msm8909 Firmware, Qualcomm Msm8917 Firmware, Qualcomm Msm8920 Firmware, Qualcomm Msm8937 Firmware, Qualcomm Msm8940 Firmware, Qualcomm Msm8953 Firmware and 69 more.

## How do I fix CVE-2020-3639?

No fix has been published for CVE-2020-3639 yet. Limit exposure of the affected software until one is available.

## Is CVE-2020-3639 being exploited?

There is no known exploitation of CVE-2020-3639 in the wild and no public exploit code.

## Other vulnerabilities in Qualcomm Apq8009 Firmware

- [CVE-2021-1905](https://insights.sbomify.com/CVE-2021-1905/): Qualcomm Multiple Chipsets Use-After-Free (high 8.4, exploited in the wild)
- [CVE-2020-11261](https://insights.sbomify.com/CVE-2020-11261/): Qualcomm Multiple Chipsets Improper Input Validation (high 7.8, exploited in the wild)
- [CVE-2021-1906](https://insights.sbomify.com/CVE-2021-1906/): Qualcomm Multiple Chipsets Detection of Error Condition Without Action (medium 6.2, exploited in the wild)
- [CVE-2022-40510](https://insights.sbomify.com/CVE-2022-40510/): Buffer copy without checking size of input in Audio. (critical 9.8)
- [CVE-2022-22088](https://insights.sbomify.com/CVE-2022-22088/): Integer Overflow to Buffer Overflow in Bluetooth HOST (critical 9.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2020-3639 and fix it if it is affected.

What it is: CVE-2020-3639 is a critical denial of service vulnerability in Qualcomm Apq8009 Firmware, published on 12 Nov 2020. 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-2020-3639 in the wild and no public exploit code.

Affected product: Qualcomm Apq8009 Firmware. 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-2020-3639/ (Markdown: https://insights.sbomify.com/CVE-2020-3639/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2020-3639
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2020-3639
- OSV: https://osv.dev/vulnerability/CVE-2020-3639

---
From sbomify Insights: https://insights.sbomify.com/CVE-2020-3639/
Summaries are generated and may contain mistakes; the official description above is the record.