CVE-2020-12762

CVSS V2 Medium 6.8 CVSS V3 High 7.8

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.

Overview

CVE ID
CVE-2020-12762

Assigner
cve@mitre.org

Vulnerability Status
Analyzed

Published Version
2020-05-09T18:15:11

Last Modified Date
2022-11-14T19:41:31

Weakness Enumerations

CWE	URL
CWE-787	http://cwe.mitre.org/data/definitions/787.html

CPE Configuration (Product)

CPE	Vulnerable	Operator	Version Start	Version End
cpe:2.3:a:json-c_project:json-c::::::::	1	OR		0.14
cpe:2.3:o:fedoraproject:fedora:30:::::::*	1	OR
cpe:2.3:o:fedoraproject:fedora:31:::::::*	1	OR
cpe:2.3:o:fedoraproject:fedora:32:::::::*	1	OR
cpe:2.3:o:debian:debian_linux:8.0:::::::*	1	OR
cpe:2.3:o:debian:debian_linux:9.0:::::::*	1	OR
cpe:2.3:o:debian:debian_linux:10.0:::::::*	1	OR
cpe:2.3:o:canonical:ubuntu_linux:12.04::::-:::	1	OR
cpe:2.3:o:canonical:ubuntu_linux:14.04::::esm:::	1	OR
cpe:2.3:o:canonical:ubuntu_linux:16.04::::esm:::	1	OR
cpe:2.3:o:canonical:ubuntu_linux:18.04::::lts:::	1	OR
cpe:2.3:o:canonical:ubuntu_linux:19.10:::::::*	1	OR
cpe:2.3:o:canonical:ubuntu_linux:20.04::::lts:::	1	OR
cpe:2.3:a:siemens:sinec_ins:-:::::::*	1	OR
cpe:2.3:a:siemens:sinec_ins:1.0:-::::::	1	OR
cpe:2.3:a:siemens:sinec_ins:1.0:sp1::::::	1	OR

CVSS Version 2

Version
2.0

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

Access Vector
NETWORK

Access Compatibility
MEDIUM

Authentication
NONE

Confidentiality Impact
PARTIAL

Integrity Impact
PARTIAL

Availability Impact
PARTIAL

Base Score
6.8

Severity
MEDIUM

Exploitability Score
8.6

Impact Score
6.4

CVSS Version 3

Version
3.1

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

Attack Vector
LOCAL

Attack Compatibility
LOW

Privileges Required
NONE

User Interaction
REQUIRED

Scope
UNCHANGED

Confidentiality Impact
HIGH

Availability Impact
HIGH

Base Score
7.8

Base Severity
HIGH

Exploitability Score
1.8

Impact Score
5.9

References

Reference URL	Reference Tags
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.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/CBR36IXYBHITAZFB5PFBJTED22WO5ONB/	Mailing List Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/CQQRRGBQCAWNCCJ2HN3W5SSCZ4QGMXQI/	Mailing List Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/W226TSCJBEOXDUFVKNWNH7ETG7AR6MCS/	Mailing List 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

Sources

Source Name	Source URL
NIST	https://nvd.nist.gov/vuln/detail/CVE-2020-12762
MITRE	https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-12762

History

Created	Old Value	New Value	Data Type	Notes
2022-05-10 16:15:23				Added to TrackCVE
2022-12-04 16:20:28	2020-05-09T18:15Z	2020-05-09T18:15:11	CVE Published Date	updated
2022-12-04 16:20:28		2022-11-14T19:41:31	CVE Modified Date	updated
2022-12-04 16:20:28		Analyzed	Vulnerability Status	updated
2022-12-04 16:20:33			References	updated