CVE-2023-39277 Memory corruption in SonicOS

What is CVE-2023-39277?

CVE-2023-39277 is a medium-severity memory corruption vulnerability in Sonicwall Sonicos, published on 17 Oct 2023. Any signed-in user can exploit it over the network, with no action from the victim.

Official description

SonicOS post-authentication stack-based buffer overflow vulnerability in the sonicflow.csv and appflowsessions.csv URL endpoints leads to a firewall crash.

Weakness: CWE-787, CWE-121

Which versions are affected by CVE-2023-39277?

It affects 1 product.

Products include Sonicwall Sonicos.

How do I fix CVE-2023-39277?

No fix has been published for CVE-2023-39277 yet. Limit exposure of the affected software until one is available.

Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.

Is CVE-2023-39277 being exploited?

There is no known exploitation of CVE-2023-39277 in the wild and no public exploit code.

Other vulnerabilities in Sonicwall Sonicos

• CVE-2020-5135 SonicWall SonicOS Buffer Overflow Exploited Critical 9.8
• CVE-2024-40766 SonicWall SonicOS Improper Access Control Exploited Critical 9.3
• CVE-2024-53704 SonicWall SonicOS SSLVPN Improper Authentication Exploited High 8.2
• CVE-2025-40600 Denial of service in SonicOS Critical 9.8
• CVE-2024-22394 Auth bypass in SonicOS Critical 9.8

All Sonicwall Sonicos vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as GHSA-537g-m9mx-pvhm.