CVE-2020-24753: A memory corruption vulnerability in Objective Open CBOR Run-time (oocborrt) in versions before 2020-08-12 cou

Q: How do I fix CVE-2020-24753?

objective open cbor run-time: upgrade to 2020-08-12. Exact commands for each OS are on this page.

Q: Is CVE-2020-24753 being exploited?

CVE-2020-24753 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2020-24753 affect?

CVE-2020-24753 affects objective open cbor run-time. Severity is critical (CVSS 9.8). 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 un

Q: How urgent is CVE-2020-24753?

Priority 66/100. Critical severity; Public exploit reference; Remotely exploitable, no login, no user action

This week

CRITICAL 9.8REMOTEUPGRADE

CVE-2020-24753 is a critical-severity flaw (CVSS 9.8) affecting objective open cbor run-time. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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 h

Why this priority

Critical severity
Public exploit reference
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	9.8 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	2.6% (top 14%)
CISA exploited list	No
Weakness	CWE-755, CWE-787, CWE-908
Published	2020-09-17
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: objective open cbor run-time project

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2020-09-17 18:15 UTCPublished CVE record published
2026-06-17 03:06 UTCUpdated Record last modified

objective open cbor run-time project objective open cbor run-time UPGRADE

Affected: < 2020-08-12

Fixed in: 2020-08-12

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy objective-open-cbor-run-time || rpm -q objective-open-cbor-run-time || objective-open-cbor-run-time --version

2. UPGRADE to 2020-08-12 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade objective-open-cbor-run-time

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade objective-open-cbor-run-time

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2020-24753?

objective open cbor run-time: upgrade to 2020-08-12. Exact commands for each OS are on this page.

Is CVE-2020-24753 being exploited?

CVE-2020-24753 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2020-24753 affect?

CVE-2020-24753 affects objective open cbor run-time. Severity is critical (CVSS 9.8). 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 un

How urgent is CVE-2020-24753?

Priority 66/100. Critical severity; Public exploit reference; Remotely exploitable, no login, no user action

References

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