CVE-2020-12762

high

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.

References

Advisories
More

https://www.debian.org/security/2020/dsa-4741

https://usn.ubuntu.com/4360-4/

https://usn.ubuntu.com/4360-1/

https://security.netapp.com/advisory/ntap-20210521-0001/

https://security.gentoo.org/glsa/202006-13

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/W226TSCJBEOXDUFVKNWNH7ETG7AR6MCS/

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/CQQRRGBQCAWNCCJ2HN3W5SSCZ4QGMXQI/

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/CBR36IXYBHITAZFB5PFBJTED22WO5ONB/

https://lists.debian.org/debian-lts-announce/2023/06/msg00023.html

https://lists.debian.org/debian-lts-announce/2020/07/msg00031.html

https://lists.debian.org/debian-lts-announce/2020/05/msg00034.html

https://lists.debian.org/debian-lts-announce/2020/05/msg00032.html

https://cert-portal.siemens.com/productcert/pdf/ssa-637483.pdf

https://lists.debian.org/debian-lts-announce/2025/07/msg00021.html

https://github.com/rsyslog/libfastjson/issues/161

https://github.com/json-c/json-c/pull/592

https://euvd.enisa.europa.eu/vulnerability/EUVD-2020-5047

https://cert-portal.siemens.com/productcert/html/ssa-794697.html

https://cert-portal.siemens.com/productcert/html/ssa-637483.html

https://cert-portal.siemens.com/productcert/html/ssa-398330.html

https://cert-portal.siemens.com/productcert/html/ssa-202008.html

Details

Source: Mitre, NVD

Published: 2020-05-09

Updated: 2026-10-14

Risk Information

CVSS v2

Base Score: 6.8

Vector: CVSS2#AV:N/AC:M/Au:N/C:P/I:P/A:P

Severity: Medium

CVSS v3

Base Score: 7.8

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

Severity: High

EPSS

EPSS: 0.01895