High severity · published May 9, 2020
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
CVSS
1.9%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Attack vector
Local
Complexity
Low
Privileges
None
User interaction
Required
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)1.9% · higher than 80% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
DL
Debian Linux · Debian
8.0; 9.0; 10.0 · source: NVD
FE
Fedora · Fedoraproject
30; 31; 32 · source: NVD
JS
Json-c · Json-c
before 0.15-20200726 · source: NVD
SI
Sinec Ins · Siemens
1.0; 1.0 · source: NVD
UL
Ubuntu Linux · Canonical
12.04; 14.04; 16.04; 18.04; 19.10; 20.04 · source: NVD
RR
RUGGEDCOM ROX MX5000 · Siemens
before V2.17.0 · source: CISA
RR
RUGGEDCOM ROX MX5000RE · Siemens
before V2.17.0 · source: CISA
RR
RUGGEDCOM ROX RX1400 · Siemens
before V2.17.0 · source: CISA
RR
RUGGEDCOM ROX RX1500 · Siemens
before V2.17.0 · source: CISA
RR
RUGGEDCOM ROX RX1501 · Siemens
before V2.17.0 · source: CISA
RR
RUGGEDCOM ROX RX1510 · Siemens
before V2.17.0 · source: CISA
RR
RUGGEDCOM ROX RX1511 · Siemens
before V2.17.0 · source: CISA
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2020-12762
CVE.org
https://www.cve.org/CVERecord?id=CVE-2020-12762
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
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