CVE-2020-27539

Public Exploit

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.

Category

9.8
CVSS
Severity: Critical
CVSS 3.1 •
CVSS 2.0 •
EPSS 0.59%
Third-Party Advisory medium.com
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
https://dil4rd.medium.com/groundhog-day-in-iot-valley-or-5-cves-in-1-camera-7dc1d2864707 third party advisory exploit

Frequently Asked Questions

What is the severity of CVE-2020-27539?
CVE-2020-27539 has been scored as a critical severity vulnerability.
How to fix CVE-2020-27539?
To fix CVE-2020-27539, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2020-27539 being actively exploited in the wild?
It is possible that CVE-2020-27539 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~1% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
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