CVE-2020-12135

Name: CVE-2020-12135
Creator: NVD / NIST
Published: 2020-04-24T01:15:11.43+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.5/10EPSS 1.17%

Last modified Jun 17, 2026

CVE-2020-12135 is a medium-severity vulnerability rated 5.5/10 on the CVSS scale. bson before 0.8 incorrectly uses int rather than size_t for many variables, parameters, and return values. In particular, the bson_ensure_space() parameter bytesNeeded could have an integer overflow via properly constructed bson input.. EPSS estimates a 1.17% chance of exploitation in the next 30 days.

Description

bson before 0.8 incorrectly uses int rather than size_t for many variables, parameters, and return values. In particular, the bson_ensure_space() parameter bytesNeeded could have an integer overflow via properly constructed bson input.

Metrics

CVSS 3.1

5.5/10

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

EPSS Probability

1.17%

63.3th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-190

Affected Software

Vendor	Product	Versions
Whoopsie Project	Whoopsie	<= 0.2.69
Mongodb	C Driver	< 0.8

References

https://bugs.launchpad.net/ubuntu/+source/whoopsie/+bug/1872560Exploit, Third Party Advisory
https://github.com/10gen-archive/mongo-c-driver-legacy/commit/1a1f5e26a4309480d88598913f9eebf9e9cba8ca#diff-f7d29a680148f52d6601f59ed787f577Patch, Third Party Advisory
https://launchpadlibrarian.net/474887364/bson-fix-overflow.patchPatch, Third Party Advisory
https://usn.ubuntu.com/4450-1/
https://bugs.launchpad.net/ubuntu/+source/whoopsie/+bug/1872560Exploit, Third Party Advisory
https://github.com/10gen-archive/mongo-c-driver-legacy/commit/1a1f5e26a4309480d88598913f9eebf9e9cba8ca#diff-f7d29a680148f52d6601f59ed787f577Patch, Third Party Advisory
https://launchpadlibrarian.net/474887364/bson-fix-overflow.patchPatch, Third Party Advisory
https://usn.ubuntu.com/4450-1/

Timeline

Published: Apr 24, 2020
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-12135?

How severe is CVE-2020-12135?

CVE-2020-12135 has a CVSS score of 5.5/10 (MEDIUM severity). The EPSS model estimates a 1.17% probability of exploitation in the next 30 days.

How do I fix CVE-2020-12135?

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-2020-12135?

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

Scan your code now

Source: NVD / NIST