CVE-2020-12762

  1. OpenCVE
  2. Vulnerabilities (CVE)
  3. 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.

7.8 /10

CVSS v3.0 : 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://www.debian.org/security/2020/dsa-4741 Third Party Advisory
https://usn.ubuntu.com/4360-4/ Third Party Advisory
https://usn.ubuntu.com/4360-1/ Third Party Advisory
https://security.netapp.com/advisory/ntap-20210521-0001/ Third Party Advisory
https://security.gentoo.org/glsa/202006-13 Third Party Advisory
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 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/2020/05/msg00034.html Mailing List Third Party Advisory
https://lists.debian.org/debian-lts-announce/2020/05/msg00032.html Mailing List Third Party Advisory
https://github.com/rsyslog/libfastjson/issues/161 Exploit Third Party Advisory
https://github.com/json-c/json-c/pull/592 Exploit Patch Third Party Advisory
https://cert-portal.siemens.com/productcert/pdf/ssa-637483.pdf 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:18.04:*:*:*:lts:*:*:*
cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:esm:*:*:*
cpe:2.3:o:canonical:ubuntu_linux:19.10:*:*:*:*:*:*:*
cpe:2.3:o:canonical:ubuntu_linux:20.04:*:*:*:lts:*:*:*
cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:esm:*:*:*
cpe:2.3:o:canonical:ubuntu_linux:12.04:*:*:*:-:*:*:*

Configuration 5 (hide)

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

30 May 2025, 20:15

Type Values Removed Values Added
References (UBUNTU) https://usn.ubuntu.com/4360-1/ - Third Party Advisory () https://usn.ubuntu.com/4360-1/ - Third Party Advisory
References (MLIST) 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/msg00032.html - Mailing List, Third Party Advisory
References (MLIST) https://lists.debian.org/debian-lts-announce/2020/05/msg00034.html - Mailing List, Third Party Advisory () https://lists.debian.org/debian-lts-announce/2020/05/msg00034.html - Mailing List, Third Party Advisory
References (CONFIRM) https://cert-portal.siemens.com/productcert/pdf/ssa-637483.pdf - Third Party Advisory () https://cert-portal.siemens.com/productcert/pdf/ssa-637483.pdf - Third Party Advisory
References (GENTOO) https://security.gentoo.org/glsa/202006-13 - Third Party Advisory () https://security.gentoo.org/glsa/202006-13 - Third Party Advisory
References (MLIST) https://lists.debian.org/debian-lts-announce/2023/06/msg00023.html - Third Party Advisory () https://lists.debian.org/debian-lts-announce/2023/06/msg00023.html - Third Party Advisory
References (MISC) https://github.com/rsyslog/libfastjson/issues/161 - Exploit, Third Party Advisory () https://github.com/rsyslog/libfastjson/issues/161 - Exploit, Third Party Advisory
References (CONFIRM) https://github.com/json-c/json-c/pull/592 - Exploit, Patch, Third Party Advisory () https://github.com/json-c/json-c/pull/592 - Exploit, Patch, Third Party Advisory
References (UBUNTU) https://usn.ubuntu.com/4360-4/ - Third Party Advisory () https://usn.ubuntu.com/4360-4/ - Third Party Advisory
References (DEBIAN) https://www.debian.org/security/2020/dsa-4741 - Third Party Advisory () https://www.debian.org/security/2020/dsa-4741 - Third Party Advisory
References (MLIST) https://lists.debian.org/debian-lts-announce/2020/07/msg00031.html - Mailing List, Third Party Advisory () https://lists.debian.org/debian-lts-announce/2020/07/msg00031.html - Mailing List, Third Party Advisory
References (CONFIRM) https://security.netapp.com/advisory/ntap-20210521-0001/ - Third Party Advisory () https://security.netapp.com/advisory/ntap-20210521-0001/ - Third Party Advisory

07 Nov 2023, 03:15

Type Values Removed Values Added
First Time Json-c
Json-c json-c
CPE cpe:2.3:a:json-c_project:json-c:*:*:*:*:*:*:*:* cpe:2.3:a:json-c:json-c:*:*:*:*:*:*:*:*
References
  • {'url': 'https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/W226TSCJBEOXDUFVKNWNH7ETG7AR6MCS/', 'name': 'FEDORA-2020-7eb7eac270', 'tags': ['Mailing List', 'Third Party Advisory'], 'refsource': 'FEDORA'}
  • {'url': 'https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/CBR36IXYBHITAZFB5PFBJTED22WO5ONB/', 'name': 'FEDORA-2020-847ad856ab', 'tags': ['Mailing List', 'Third Party Advisory'], 'refsource': 'FEDORA'}
  • {'url': 'https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/CQQRRGBQCAWNCCJ2HN3W5SSCZ4QGMXQI/', 'name': 'FEDORA-2020-63c6f4ab1d', 'tags': ['Mailing List', 'Third Party Advisory'], 'refsource': 'FEDORA'}
  • () 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/ -
References (MLIST) https://lists.debian.org/debian-lts-announce/2023/06/msg00023.html - (MLIST) https://lists.debian.org/debian-lts-announce/2023/06/msg00023.html - Third Party Advisory

21 Jun 2023, 00:15

Type Values Removed Values Added
References
  • (MLIST) https://lists.debian.org/debian-lts-announce/2023/06/msg00023.html -
Information

Published : 2020-05-09 18:15

Updated : 2025-05-30 20:15

NVD link : CVE-2020-12762

Mitre link : CVE-2020-12762

JSON object : View

Products Affected

debian

  • debian_linux

json-c

  • json-c

fedoraproject

  • fedora

canonical

  • ubuntu_linux

siemens

  • sinec_ins
CWE
CWE-787

Out-of-bounds Write

CWE-190

Integer Overflow or Wraparound