CVE-2020-12762

moderate-risk

Published 2020-05-09

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

Do I need to act?

0.28% chance of exploitation

EPSS score — low exploit probability

Not on CISA KEV list

No confirmed active exploitation reported to CISA

Patch status unknown

Check vendor advisories for fix availability and mitigation guidance

CVSS 7.8/10 High

LOCAL / LOW complexity

Json-C

Fedora

Debian Linux

Ubuntu Linux

Sinec Ins

Debian Siemens Canonical Fedoraproject Json-C

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

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

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

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

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

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

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

Third Party Advisory https://security.gentoo.org/glsa/202006-13

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

Third Party Advisory https://usn.ubuntu.com/4360-1/

Third Party Advisory https://usn.ubuntu.com/4360-4/

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

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

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

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

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

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

and 11 more references

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moderate-risk

Severity 24/34 · High

Exploitability 1/34 · Minimal

Exposure 18/34 · Moderate