CVE-2020-24753

Name: CVE-2020-24753
Creator: NVD / NIST
Published: 2020-09-17T18:15:12.32+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.8/10EPSS 2.64%

Last modified Jun 17, 2026

CVE-2020-24753 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. A memory corruption vulnerability in Objective Open CBOR Run-time (oocborrt) in versions before 2020-08-12 could allow an attacker to execute code via crafted Concise Binary Object Representation (CBOR) input to the cbor2json decoder. An uncaught error while decoding CBOR Major Type 3 text strings leads to the use of an attacker-controllable uninitialized stack value. EPSS estimates a 2.64% chance of exploitation in the next 30 days.

Description

A memory corruption vulnerability in Objective Open CBOR Run-time (oocborrt) in versions before 2020-08-12 could allow an attacker to execute code via crafted Concise Binary Object Representation (CBOR) input to the cbor2json decoder. An uncaught error while decoding CBOR Major Type 3 text strings leads to the use of an attacker-controllable uninitialized stack value. This can be used to modify memory, causing a crash or potentially exploitable heap corruption.

Metrics

CVSS 3.1

9.8/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS Probability

2.64%

83.7th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Objective Open Cbor Run-Time Project	Objective Open Cbor Run-Time	< 2020-08-12

References

https://github.com/objsys/oocborrt/commit/539851c66778f68a244633985f6f8d0df94ea3b3Patch, Third Party Advisory
https://warcollar.com/cve-2020-24753.htmlExploit, Third Party Advisory
https://github.com/objsys/oocborrt/commit/539851c66778f68a244633985f6f8d0df94ea3b3Patch, Third Party Advisory
https://warcollar.com/cve-2020-24753.htmlExploit, Third Party Advisory

Timeline

Published: Sep 17, 2020
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-24753?

How severe is CVE-2020-24753?

CVE-2020-24753 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 2.64% probability of exploitation in the next 30 days.

How do I fix CVE-2020-24753?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2020-24753?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST