CVE-2021-3405

Public Exploit

Description

A flaw was found in libebml before 1.4.2. A heap overflow bug exists in the implementation of EbmlString::ReadData and EbmlUnicodeString::ReadData in libebml.

Category

6.5
CVSS
Severity: Medium
CVSS 3.1 •
CVSS 2.0 •
EPSS 0.24%
Vendor Advisory fedoraproject.org Vendor Advisory fedoraproject.org Vendor Advisory fedoraproject.org Vendor Advisory gentoo.org
Affected: n/a libebml
Published at:
Updated at:

References

Link Tags
https://github.com/Matroska-Org/libebml/issues/74 issue tracking exploit third party advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/YY7R2JZRO5I6WS62KTJFTZGKYELVFTVB/ vendor advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/JNHQI6MDOECJ2HT5GCLEX2DMJFEOWPW7/ vendor advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/UHIIMWZKHHELFF4NRDMOOCS3HKK3K4DF/ vendor advisory
https://lists.debian.org/debian-lts-announce/2021/04/msg00016.html third party advisory mailing list
https://security.gentoo.org/glsa/202208-21 third party advisory vendor advisory

Frequently Asked Questions

What is the severity of CVE-2021-3405?
CVE-2021-3405 has been scored as a medium severity vulnerability.
How to fix CVE-2021-3405?
To fix CVE-2021-3405, 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-2021-3405 being actively exploited in the wild?
It is possible that CVE-2021-3405 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2021-3405?
CVE-2021-3405 affects n/a libebml.
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