CVE-2018-14337 json
The CHECK macro in mrbgems/mruby-sprintf/src/sprintf.c in mruby 1.4.1 contains a signed integer overflow, possibly leading to out-of-bounds…
published 2018-07-17 8 y ago modified 2026-06-17 4 mo ago also EUVD-2018-6259
- cvss
- 7.5
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 1.4%
- EPSS 1.4% chance of exploitation in 30 days, percentile 71%
- public exploits
- 0
- none known
Summary
The CHECK macro in mrbgems/mruby-sprintf/src/sprintf.c in mruby 1.4.1 contains a signed integer overflow, possibly leading to out-of-bounds memory access because the mrb_str_resize function in string.c does not check for a negative length.
Patch / fix
- mruby Debian 14, Debian 13, Debian 12 2.0.0-1
debian advisories DEBIAN-CVE-2018-14337
Exploit prediction
1.35% chance of exploitation in the next 30 days, higher than 71% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- github.com https://github.com/mruby/mruby/issues/4062 referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 3.1 | 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N |
| NVD | 2.0 | 5.0 | AV:N/AC:L/Au:N/C:P/I:N/A:N |
Classification
- Weakness
-
- CWE-190 Integer Overflow or Wraparound
References
-
github.com
/mruby/mruby/issues/4062
exploit, issue-tracking, third-party-advisory
-
lists.debian.org
/debian-lts-announce/2022/05/msg00006.html
mailing-list, third-party-advisory
Sources
- CVE List CVE-2018-14337
- NVD CVE-2018-14337
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.