HIGH
The unpack implementation in Swoole version 4.0.4 lacks correct size checks in the deserialization process
Published Aug 18, 2018
7.5
HIGHCVSS 3.0
EPSS 2.27%
Description
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.
Affected products
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
No CVSS v3.1 score for this CVE.
7.5 HIGH NVD
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality Impact None
Integrity Impact None
Availability Impact High
5.0 MEDIUM NVD
AV:N/AC:L/Au:N/C:N/I:N/A:P
Access Vector Network
Access Complexity Low
Authentication None
Confidentiality Impact None
Integrity Impact None
Availability Impact Partial
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
2.27% 0.02272
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 3, 2026.
EPSS probability 0.02272
Score over time
2021–2026- EPSS v1
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v1
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (17 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 3, 2026 | 2.27% (0.02272) | 82.48th | v5 (v2026.06.15) |
| Jun 15, 2026 | 2.27% (0.02272) | 80.73th | v5 (v2026.06.15) |
| Mar 30, 2025 | 2.09% (0.02093) | 82.47th | v4 (v2025.03.14) |
| Mar 29, 2025 | 18.86% (0.18861) | 92.27th | v4 (v2025.03.14) |
| Mar 17, 2025 | 2.09% (0.02093) | 82.84th | v4 (v2025.03.14) |
| Jul 20, 2024 | 0.27% (0.00272) | 68.25th | v3 (v2023.03.01) |
| Feb 8, 2024 | 0.27% (0.00272) | 67.01th | v3 (v2023.03.01) |
| Aug 11, 2023 | 0.27% (0.00272) | 63.78th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.24% (0.00237) | 59.95th | v3 (v2023.03.01) |
| Mar 6, 2023 | 0.95% (0.00954) | 36.37th | v2 (v2022.01.01) |
| Sep 2, 2022 | 0.95% (0.00954) | 34.50th | v2 (v2022.01.01) |
| Apr 1, 2022 | 0.95% (0.00954) | 32.50th | v2 (v2022.01.01) |
| Feb 4, 2022 | 0.95% (0.00954) | 16.28th | v2 (v2022.01.01) |
| Feb 3, 2022 | 0.83% (0.00833) | 24.58th | v1 |
| Jan 6, 2022 | 0.83% (0.00833) | 23.96th | v1 |
| Sep 1, 2021 | 0.83% (0.00833) | 57.50th | v1 |
| Apr 14, 2021 | 0.83% (0.00833) | 0.00th | v1 |
Weaknesses (1)
References (3)
- https://github.com/swoole/swoole-src/commit/4cdbce5d9bf2fe596bb6acd7d6611f9e8c253a76 x_refsource_MISCPatchVendor Advisory
- https://github.com/swoole/swoole-src/issues/1882 x_refsource_MISCIssue TrackingVendor Advisory
- https://x-c3ll.github.io/posts/swoole-deserialization-cve-2018-15503/ x_refsource_MISCTechnical DescriptionThird Party Advisory
| Link | Providers | Tags |
|---|---|---|
| https://github.com/swoole/swoole-src/commit/4cdbce5d9bf2fe596bb6acd7d6611f9e8c253a76 | x_refsource_MISCPatchVendor Advisory | |
| https://github.com/swoole/swoole-src/issues/1882 | x_refsource_MISCIssue TrackingVendor Advisory | |
| https://x-c3ll.github.io/posts/swoole-deserialization-cve-2018-15503/ | x_refsource_MISCTechnical DescriptionThird Party Advisory |
Change history (0)
No recorded changes yet.
Sources
CVE.org / MITRE
Status PUBLISHED
Assigner mitre
Published Aug 18, 2018
Updated Aug 5, 2024
Reserved Aug 17, 2018
Link CVE-2018-15503
CISA Vulnrichment
Updated n/a