CVE-2020-12762 is an integer overflow and out-of-bounds write vulnerability in json-c versions up to 0.14, affecting products from vendors like Canonical, Debian, Fedora, and Siemens. With a CVSS score of 7.8 (HIGH), it allows an unauthenticated attacker to achieve high impact on confidentiality, integrity, and availability through local access and user interaction, typically via a crafted large JSON file. Despite its severity, there is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
< 0.15-20200726CPE matchmatch criteria | cpe:2.3:a:json-c:json-c:*:*:*:*:*:*:*:* | ||
30CPE matchmatch criteria | cpe:2.3:o:fedoraproject:fedora:30:*:*:*:*:*:*:* | ||
31CPE matchmatch criteria | cpe:2.3:o:fedoraproject:fedora:31:*:*:*:*:*:*:* | ||
32CPE matchmatch criteria | cpe:2.3:o:fedoraproject:fedora:32:*:*:*:*:*:*:* | ||
8.0CPE matchmatch criteria | cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:* |
CVSS version used by this source: 3.1
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.2 GitHub mentions.
No media coverage found for this CVE.
The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.
CVE-2020-12762
Aug 11, 2020json-c through 0.14 has an integer overflow and out-of-bounds write via a large JSON file as demonstrated by printbuf_memappend.
May 12, 2020libfastjson: integer overflow and out-of-bounds write via a large JSON file
May 2, 2020