CVE-2020-27539 Memory corruption in n/a

Critical 9.8 Published 25 Jan 2021 Updated 4 Aug 2024

Heap buffer overflow in the camera's HTTP parser allows code execution, though exploitation requires bypassing default HTTPS-only restrictions.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Over the internet
Victim action needed: Not needed
Fix: None listed

What is CVE-2020-27539?

CVE-2020-27539 is a critical memory corruption vulnerability in n/a, published on 25 Jan 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

Heap overflow with full parsing of HTTP respose in Rostelecom CS-C2SHW 5.0.082.1. AgentUpdater service has a self-written HTTP parser and builder. HTTP parser has a heap buffer overflow (OOB write). In default configuration camera parses responses only from HTTPS URLs from config file, so vulnerable code is unreachable and one more bug required to reach it.

Weakness: CWE-787

Which versions are affected by CVE-2020-27539?

It affects 1 product.

Products include Company Cs-C2shw Firmware.

How do I fix CVE-2020-27539?

No fix has been published for CVE-2020-27539 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-2020-27539 being exploited?

There is no known exploitation of CVE-2020-27539 in the wild and no public exploit code.

Sources

Also known as GHSA-75m6-wc48-gvw9.