CVE-2020-12762 — Integer Overflow or Wraparound in Json-c

CWE-190 — Integer Overflow or WraparoundCWE-787 — Out-of-bounds Write14 documents9 sources
Severity
7.8HIGHNVD
EPSS
0.3%
top 48.56%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
5
Json-cCanonical Ubuntu LinuxDebian Linux+2 more
Timeline
PublishedMay 9
Latest updateMay 24

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:HExploitability: 1.8 | Impact: 5.9

Affected Packages4 packages

▶NVDjson-c/json-c< 0.15-20200726
▶Debianjson-c/json-c< 0.13.1+dfsg-8+3
▶Ubuntujson-c/json-c< 0.11-4ubuntu2.6+3

Also affects: Debian Linux 10.0, 8.0, 9.0, Fedora 30, 31, 32, Ubuntu Linux 12.04, 14.04, 16.04, 18.04, 19.10, 20.04

Patches

Patch: github.com ↗Patch: github.com ↗

🔴Vulnerability Details

4
GHSA
GHSA-3797-gmjf-45gm: json-c through 0↗2022-05-24
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OSV
json-c vulnerability↗2020-05-28
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OSV
CVE-2020-12762: json-c through 0↗2020-05-09
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CVEList
CVE-2020-12762: json-c through 0↗2020-05-09
▶

📋Vendor Advisories

5
Ubuntu
json-c vulnerability↗2020-05-28
▶
Ubuntu
json-c vulnerability↗2020-05-14
▶
Microsoft
json-c through 0.14 has an integer overflow and out-of-bounds write via a large JSON file as demonstrated by printbuf_memappend.↗2020-05-12
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Red Hat
libfastjson: integer overflow and out-of-bounds write via a large JSON file↗2020-05-02
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Debian
CVE-2020-12762: json-c - json-c through 0.14 has an integer overflow and out-of-bounds write via a large ...↗2020
▶

💬Community

4
Bugzilla
CVE-2020-12762 json-c12: json-c: integer overflow and out-of-bounds write via a large JSON file [epel-7]↗2020-05-15
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Bugzilla
CVE-2020-12762 json-c12: json-c: integer overflow and out-of-bounds write via a large JSON file [epel-6]↗2020-05-15
▶
Bugzilla
CVE-2020-12762 json-c: integer overflow and out-of-bounds write via a large JSON file [fedora-all]↗2020-05-13
▶
Bugzilla
CVE-2020-12762 json-c, libfastjson: integer overflow and out-of-bounds write via a large JSON file↗2020-05-13
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CVE-2020-12762 — Integer Overflow or Wraparound | cvebase