CVE-2018-15503 json
The unpack implementation in Swoole version 4.0.4 lacks correct size checks in the deserialization process.
published 8y ago modified 4mo ago also EUVD-2018-7380
- cvss
- 7.5
- version 3.0, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 2.3%
- EPSS 2.3% chance of exploitation in 30 days, percentile 83%
- public exploits
- 0
- none known
Summary
The unpack implementation in Swoole version 4.0.4 lacks correct size checks in the deserialization process. An attacker can craft a serialized object to exploit this vulnerability and cause a SEGV.
Patch / fix
Is CVE-2018-15503 in your stack? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.
Check with FencerExploit prediction
2.27% chance of exploitation in the next 30 days, higher than 83% of all scored CVEs (FIRST EPSS, 2026-11-09).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 3.0 | 7.5 | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
| NVD | 2.0 | 5.0 | AV:N/AC:L/Au:N/C:N/I:N/A:P |
Classification
- Weakness
-
- CWE-502 Deserialization of Untrusted Data
References
-
github.com
/swoole/swoole-src/commit/4cdbce5d9bf2fe596bb6acd7d6611f9e8c253a76
patch, vendor-advisory
-
github.com
/swoole/swoole-src/issues/1882
issue-tracking, vendor-advisory
-
x-c3ll.github.io
/posts/swoole-deserialization-cve-2018-15503/
technical-description, third-party-advisory
Sources
- CVE List CVE-2018-15503
- NVD CVE-2018-15503
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