7.8

CVE-2020-12762

Exploit

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

Data is provided by the National Vulnerability Database (NVD)
Json-cJson-c Version < 0.15-20200726
FedoraprojectFedora Version30
FedoraprojectFedora Version31
FedoraprojectFedora Version32
DebianDebian Linux Version8.0
DebianDebian Linux Version9.0
DebianDebian Linux Version10.0
CanonicalUbuntu Linux Version12.04 SwEdition-
CanonicalUbuntu Linux Version14.04 SwEditionesm
CanonicalUbuntu Linux Version16.04 SwEditionesm
CanonicalUbuntu Linux Version18.04 SwEditionlts
CanonicalUbuntu Linux Version19.10
CanonicalUbuntu Linux Version20.04 SwEditionlts
SiemensSinec Ins Version-
SiemensSinec Ins Version1.0 Update-
SiemensSinec Ins Version1.0 Updatesp1
Zu dieser CVE wurde keine CISA KEV oder CERT.AT-Warnung gefunden.
EPSS Metriken
Type Source Score Percentile
EPSS FIRST.org 0.28% 0.513
CVSS Metriken
Source Base Score Exploit Score Impact Score Vector string
nvd@nist.gov 7.8 1.8 5.9
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
nvd@nist.gov 6.8 8.6 6.4
AV:N/AC:M/Au:N/C:P/I:P/A:P
134c704f-9b21-4f2e-91b3-4a467353bcc0 7.8 1.8 5.9
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
CWE-190 Integer Overflow or Wraparound

The product performs a calculation that can produce an integer overflow or wraparound when the logic assumes that the resulting value will always be larger than the original value. This occurs when an integer value is incremented to a value that is too large to store in the associated representation. When this occurs, the value may become a very small or negative number.

CWE-787 Out-of-bounds Write

The product writes data past the end, or before the beginning, of the intended buffer.

https://github.com/json-c/json-c/pull/592
Patch
Third Party Advisory
Exploit
https://usn.ubuntu.com/4360-1/
Third Party Advisory
https://usn.ubuntu.com/4360-4/
Third Party Advisory