Symfony allows internal address and port enumeration by NoPrivateNetworkHttpClient
Description
When using the NoPrivateNetworkHttpClient, some internal information is still leaking during host resolution, which leads to possible IP/port enumeration.
Resolution
The NoPrivateNetworkHttpClient now filters blocked IPs earlier to prevent such leaks.
The fisrt patch for this issue is available here for branch 5.4.
The second one is available here for branch 5.4 also.
Credits
We would like to thank Linus Karlsson and Chris Smith for reporting the issue and Nicolas Grekas for providing the fix.
Affected software
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| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| Composer package | symfony/http-client | >= 4.3.0, < 5.4.47, >= 6.0.0, < 6.4.15, >= 7.0.0, < 7.1.8 | 5.4.47, 6.4.15, 7.1.8 |
| Composer package | symfony/symfony | >= 4.3.0, < 5.4.47, >= 6.0.0, < 6.4.15, >= 7.0.0, < 7.1.8 | 5.4.47, 6.4.15, 7.1.8 |
References
- https://github.com/symfony/symfony/security/advisories/GHSA-9c3x-r3wp-mgxm
- https://nvd.nist.gov/vuln/detail/CVE-2024-50342
- https://github.com/symfony/symfony/commit/296d4b34a33b1a6ca5475c6040b3203622520f5b
- https://github.com/FriendsOfPHP/security-advisories/blob/master/symfony/http-client/CVE-2024-50342.yaml
- https://github.com/FriendsOfPHP/security-advisories/blob/master/symfony/symfony/CVE-2024-50342.yaml
- https://github.com/symfony/symfony
- https://symfony.com/cve-2024-50342
- CVSS vector
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N- Weakness (CWE)
CWE-200- Platform
- Composer
- Package
symfony/http-client, symfony/symfony- Disclosed
- 06.11.2024
- Updated
- 11.10.2026 10:22
Sources and licenses
OSV / GitHub Advisory Database - GHSA-9c3x-r3wp-mgxm - CC BY 4.0
Vulnerability history: symfony/http-client
All published vulnerabilities of this package (Composer package), newest first. Shows whether this is a one-off slip or a package that needs watching.
- Total entries
- 2
- First → latest
- 11.2024 06.2026
- Without a fix
- 0
- Exploited in attacks
- 0
Severity breakdown
- Medium 1
- Low 1
Disclosures per year
- 2024: 1
- 2025: 0
- 2026: 1
-
Symfony allows internal address and port enumeration by NoPrivateNetworkHttpClient this entry
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