CVE-2020-12762

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

CVSS v3 7.8 HIGH
CVSS v2.0 6.8 MEDIUM

7.8^/10

CVSS v3 : HIGH

V3 Legend

Vector :

Exploitability : 1.8 / Impact : 5.9

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required NONE

User Interaction REQUIRED

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

6.8^/10

CVSS v2.0 : MEDIUM

V2 Legend

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

Exploitability : 8.6 / Impact : 6.4

Access Vector NETWORK

Access Complexity MEDIUM

Authentication NONE

Confidentiality Impact PARTIAL

Integrity Impact PARTIAL

Availability Impact PARTIAL

References

Link	Resource
https://cert-portal.siemens.com/productcert/pdf/ssa-637483.pdf	Third Party Advisory
https://github.com/json-c/json-c/pull/592	Exploit Patch Third Party Advisory
https://github.com/rsyslog/libfastjson/issues/161	Exploit Third Party Advisory
https://lists.debian.org/debian-lts-announce/2020/05/msg00032.html	Mailing List Third Party Advisory
https://lists.debian.org/debian-lts-announce/2020/05/msg00034.html	Mailing List Third Party Advisory
https://lists.debian.org/debian-lts-announce/2020/07/msg00031.html	Mailing List Third Party Advisory
https://lists.debian.org/debian-lts-announce/2023/06/msg00023.html	Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/CBR36IXYBHITAZFB5PFBJTED22WO5ONB/
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/W226TSCJBEOXDUFVKNWNH7ETG7AR6MCS/
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	Third Party Advisory
https://github.com/json-c/json-c/pull/592	Exploit Patch Third Party Advisory
https://github.com/rsyslog/libfastjson/issues/161	Exploit Third Party Advisory
https://lists.debian.org/debian-lts-announce/2020/05/msg00032.html	Mailing List Third Party Advisory
https://lists.debian.org/debian-lts-announce/2020/05/msg00034.html	Mailing List Third Party Advisory
https://lists.debian.org/debian-lts-announce/2020/07/msg00031.html	Mailing List Third Party Advisory
https://lists.debian.org/debian-lts-announce/2023/06/msg00023.html	Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/CBR36IXYBHITAZFB5PFBJTED22WO5ONB/
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/W226TSCJBEOXDUFVKNWNH7ETG7AR6MCS/
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

Configurations

Configuration 1 (hide)

cpe:2.3:a:json-c:json-c:*:*:*:*:*:*:*:*

Configuration 2 (hide)

OR	cpe:2.3:o:fedoraproject:fedora:30:::::::*
	cpe:2.3:o:fedoraproject:fedora:31:::::::*
	cpe:2.3:o:fedoraproject:fedora:32:::::::*

Configuration 3 (hide)

OR	cpe:2.3:o:debian:debian_linux:8.0:::::::*
	cpe:2.3:o:debian:debian_linux:9.0:::::::*
	cpe:2.3:o:debian:debian_linux:10.0:::::::*

Configuration 4 (hide)

OR	cpe:2.3:o:canonical:ubuntu_linux:12.04::::-:::
	cpe:2.3:o:canonical:ubuntu_linux:14.04::::esm:::
	cpe:2.3:o:canonical:ubuntu_linux:16.04::::esm:::
	cpe:2.3:o:canonical:ubuntu_linux:18.04::::lts:::
	cpe:2.3:o:canonical:ubuntu_linux:19.10:::::::*
	cpe:2.3:o:canonical:ubuntu_linux:20.04::::lts:::

Configuration 5 (hide)

OR	cpe:2.3:a:siemens:sinec_ins:-:::::::*
	cpe:2.3:a:siemens:sinec_ins:1.0:-::::::
	cpe:2.3:a:siemens:sinec_ins:1.0:sp1::::::

History

21 Nov 2024, 05:00

Information

Published : 2020-05-09 18:15

Updated : 2025-05-30 20:15

NVD link : CVE-2020-12762

Mitre link : CVE-2020-12762

CVE.ORG link : CVE-2020-12762

JSON object : View

Products Affected

debian

debian_linux

fedoraproject

fedora

siemens

sinec_ins

canonical

ubuntu_linux

json-c

json-c

CWE

CWE-190

Integer Overflow or Wraparound

CWE-787

Out-of-bounds Write

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7.8 /10