CVE-2020-12762

7.8 HIGH
Published: May 09, 2020 Modified: November 03, 2025
View on NVD

Description

json-c through 0.14 has an integer overflow and out-of-bounds write via a large JSON file, as demonstrated by printbuf_memappend.

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CVSS v3.x Details

0.0 Low Medium High Critical 10.0
Vector String
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

References to Advisories, Solutions, and Tools

Patch Vendor Advisory Exploit Third Party Advisory
https://cert-portal.siemens.com/productcert/pdf/ssa-637483.pdf
Source: cve@mitre.org
Third Party Advisory
https://github.com/json-c/json-c/pull/592
Source: cve@mitre.org
Exploit Patch Third Party Advisory
https://github.com/rsyslog/libfastjson/issues/161
Source: cve@mitre.org
Exploit Third Party Advisory
https://lists.debian.org/debian-lts-announce/2020/05/msg00032.html
Source: cve@mitre.org
Mailing List Third Party Advisory
https://lists.debian.org/debian-lts-announce/2020/05/msg00034.html
Source: cve@mitre.org
Mailing List Third Party Advisory
https://lists.debian.org/debian-lts-announce/2020/07/msg00031.html
Source: cve@mitre.org
Mailing List Third Party Advisory
https://lists.debian.org/debian-lts-announce/2023/06/msg00023.html
Source: cve@mitre.org
Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/CBR36IXYBHITAZFB5PFBJTED22WO5ONB/
Source: cve@mitre.org
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/CQQRRGBQCAWNCCJ2HN3W5SSCZ4QGMXQI/
Source: cve@mitre.org
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/W226TSCJBEOXDUFVKNWNH7ETG7AR6MCS/
Source: cve@mitre.org
https://security.gentoo.org/glsa/202006-13
Source: cve@mitre.org
Third Party Advisory
https://security.netapp.com/advisory/ntap-20210521-0001/
Source: cve@mitre.org
Third Party Advisory
https://usn.ubuntu.com/4360-1/
Source: cve@mitre.org
Third Party Advisory
https://usn.ubuntu.com/4360-4/
Source: cve@mitre.org
Third Party Advisory
https://www.debian.org/security/2020/dsa-4741
Source: cve@mitre.org
Third Party Advisory
https://cert-portal.siemens.com/productcert/pdf/ssa-637483.pdf
Source: af854a3a-2127-422b-91ae-364da2661108
Third Party Advisory
https://github.com/json-c/json-c/pull/592
Source: af854a3a-2127-422b-91ae-364da2661108
Exploit Patch Third Party Advisory
https://github.com/rsyslog/libfastjson/issues/161
Source: af854a3a-2127-422b-91ae-364da2661108
Exploit Third Party Advisory
https://lists.debian.org/debian-lts-announce/2020/05/msg00032.html
Source: af854a3a-2127-422b-91ae-364da2661108
Mailing List Third Party Advisory
https://lists.debian.org/debian-lts-announce/2020/05/msg00034.html
Source: af854a3a-2127-422b-91ae-364da2661108
Mailing List Third Party Advisory
https://lists.debian.org/debian-lts-announce/2020/07/msg00031.html
Source: af854a3a-2127-422b-91ae-364da2661108
Mailing List Third Party Advisory
https://lists.debian.org/debian-lts-announce/2023/06/msg00023.html
Source: af854a3a-2127-422b-91ae-364da2661108
Third Party Advisory
https://lists.debian.org/debian-lts-announce/2025/07/msg00021.html
Source: af854a3a-2127-422b-91ae-364da2661108
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/CBR36IXYBHITAZFB5PFBJTED22WO5ONB/
Source: af854a3a-2127-422b-91ae-364da2661108
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/CQQRRGBQCAWNCCJ2HN3W5SSCZ4QGMXQI/
Source: af854a3a-2127-422b-91ae-364da2661108
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/W226TSCJBEOXDUFVKNWNH7ETG7AR6MCS/
Source: af854a3a-2127-422b-91ae-364da2661108
https://security.gentoo.org/glsa/202006-13
Source: af854a3a-2127-422b-91ae-364da2661108
Third Party Advisory
https://security.netapp.com/advisory/ntap-20210521-0001/
Source: af854a3a-2127-422b-91ae-364da2661108
Third Party Advisory
https://usn.ubuntu.com/4360-1/
Source: af854a3a-2127-422b-91ae-364da2661108
Third Party Advisory
https://usn.ubuntu.com/4360-4/
Source: af854a3a-2127-422b-91ae-364da2661108
Third Party Advisory
https://www.debian.org/security/2020/dsa-4741
Source: af854a3a-2127-422b-91ae-364da2661108
Third Party Advisory

31 reference(s) from NVD

Quick Stats

CVSS v3 Score
7.8 / 10.0
EPSS (Exploit Probability)
0.3%
51th percentile
Exploitation Status
Not in CISA KEV

Weaknesses (CWE)

CWE-190 CWE-787 CWE-787

Affected Vendors

canonical fedoraproject json-c debian siemens

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