What is CVE-2024-50342?

CVE-2024-50342 is a low-severity security vulnerability in symfony/http-client (composer), affecting versions >= 4.3.0, < 5.4.47. It is fixed in 5.4.47, 6.4.15, 7.1.8.

How severe is CVE-2024-50342?

CVE-2024-50342 has a CVSS score of 3.1 (Low). This score reflects the worst-case severity of the vulnerability, not your specific exposure. Whether it represents real risk in your environment depends on whether the vulnerable code is present and reachable.

Which packages are affected by CVE-2024-50342?

symfony/http-client (composer) versions >= 4.3.0, = 4.3.0, < 5.4.47.

Is there a fix for CVE-2024-50342?

Yes. CVE-2024-50342 is fixed in 5.4.47, 6.4.15, 7.1.8. Upgrade to this version or later.

Is CVE-2024-50342 exploitable, and should I be worried?

Whether CVE-2024-50342 is exploitable in your environment depends on whether the vulnerable code is present and reachable. A CVSS score is a worst-case rating; it does not account for your specific deployment, configuration, or usage patterns. Kodem, an Intelligent Application Security platform, uses runtime intelligence to show which vulnerabilities actually execute in production, so you can focus on the ones that represent real risk.

What actually determines whether CVE-2024-50342 is exploitable, and how bad it is?

Exploitability and impact are not fixed properties of a CVE. They depend on runtime truth: whether the vulnerable code is present, reachable, and actually executes in your application. A high CVSS score on a dependency that never runs is not the same as real risk. Kodem, an Intelligent Application Security platform, uses runtime intelligence to reveal which vulnerabilities actually execute in production, so teams prioritize the ones that genuinely matter.

CVE-2024-50342 in symfony/http-client | Intelligent Application Security

Q: How severe is CVE-2024-50342?

CVE-2024-50342 has a CVSS score of 3.1 (Low). This score reflects the worst-case severity of the vulnerability, not your specific exposure. Whether it represents real risk in your environment depends on whether the vulnerable code is present and reachable.

Q: Which packages are affected by CVE-2024-50342?

symfony/http-client (composer) versions >= 4.3.0, = 4.3.0, < 5.4.47.

Q: Is there a fix for CVE-2024-50342?

Yes. CVE-2024-50342 is fixed in 5.4.47, 6.4.15, 7.1.8. Upgrade to this version or later.

Q: Is CVE-2024-50342 exploitable, and should I be worried?

Whether CVE-2024-50342 is exploitable in your environment depends on whether the vulnerable code is present and reachable. A CVSS score is a worst-case rating; it does not account for your specific deployment, configuration, or usage patterns. Kodem, an Intelligent Application Security platform, uses runtime intelligence to show which vulnerabilities actually execute in production, so you can focus on the ones that represent real risk.

Q: What actually determines whether CVE-2024-50342 is exploitable, and how bad it is?

Exploitability and impact are not fixed properties of a CVE. They depend on runtime truth: whether the vulnerable code is present, reachable, and actually executes in your application. A high CVSS score on a dependency that never runs is not the same as real risk. Kodem, an Intelligent Application Security platform, uses runtime intelligence to reveal which vulnerabilities actually execute in production, so teams prioritize the ones that genuinely matter.

Q: How do I fix CVE-2024-50342?

Upgrade: symfony/http-client to 5.4.47 or later, symfony/http-client to 6.4.15 or later, symfony/http-client to 7.1.8 or later, symfony/symfony to 5.4.47 or later, symfony/symfony to 6.4.15 or later, symfony/symfony to 7.1.8 or later.

Summary

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.

Impact

CVE-2024-50342 has a CVSS score of 3.1 (Low). The vector is network-reachable, low privileges required, and no user interaction. A CVSS score reflects the worst-case severity of the vulnerability, not your specific exposure. Whether this affects your application depends on whether the vulnerable code is present and reachable in your environment. A fixed version is available (5.4.47, 6.4.15, 7.1.8); upgrading removes the vulnerable code path.

Affected versions

symfony/http-client (>= 4.3.0, < 5.4.47) symfony/http-client (>= 6.0.0, < 6.4.15) symfony/http-client (>= 7.0.0, < 7.1.8) symfony/symfony (>= 4.3.0, < 5.4.47) symfony/symfony (>= 6.0.0, < 6.4.15) symfony/symfony (>= 7.0.0, < 7.1.8)

Security releases

symfony/http-client → 5.4.47 (composer) symfony/http-client → 6.4.15 (composer) symfony/http-client → 7.1.8 (composer) symfony/symfony → 5.4.47 (composer) symfony/symfony → 6.4.15 (composer) symfony/symfony → 7.1.8 (composer)

Kodem intelligence

Severity tells you how bad this could be in the worst case. It does not tell you whether you are exposed. Exploitability and impact are functions of runtime truth: whether the vulnerable code is present, reachable, and actually executes in your application. A vulnerable package can sit in your dependency tree and never run.

Kodem, an Intelligent Application Security platform, uses runtime intelligence to reveal which vulnerabilities actually execute in production, so teams prioritize the ones that genuinely matter. Kodem's runtime-powered SCA identifies whether this CVE is reachable in your applications.

See it in your environment

Remediation advice

Upgrade the following packages to resolve this vulnerability:

symfony/http-client to 5.4.47 or later; symfony/http-client to 6.4.15 or later; symfony/http-client to 7.1.8 or later; symfony/symfony to 5.4.47 or later; symfony/symfony to 6.4.15 or later; symfony/symfony to 7.1.8 or later

Kodem Kai can prioritize this vulnerability in your dependency tree and generate a fix recommendation.

Frequently Asked Questions

What is CVE-2024-50342? CVE-2024-50342 is a low-severity security vulnerability in symfony/http-client (composer), affecting versions >= 4.3.0, < 5.4.47. It is fixed in 5.4.47, 6.4.15, 7.1.8.
How severe is CVE-2024-50342? CVE-2024-50342 has a CVSS score of 3.1 (Low). This score reflects the worst-case severity of the vulnerability, not your specific exposure. Whether it represents real risk in your environment depends on whether the vulnerable code is present and reachable.
Which packages are affected by CVE-2024-50342?
- symfony/http-client (composer) (versions >= 4.3.0, < 5.4.47)
- symfony/symfony (composer) (versions >= 4.3.0, < 5.4.47)
Is there a fix for CVE-2024-50342? Yes. CVE-2024-50342 is fixed in 5.4.47, 6.4.15, 7.1.8. Upgrade to this version or later.
Is CVE-2024-50342 exploitable, and should I be worried? Whether CVE-2024-50342 is exploitable in your environment depends on whether the vulnerable code is present and reachable. A CVSS score is a worst-case rating; it does not account for your specific deployment, configuration, or usage patterns. Kodem, an Intelligent Application Security platform, uses runtime intelligence to show which vulnerabilities actually execute in production, so you can focus on the ones that represent real risk. Get a demo
What actually determines whether CVE-2024-50342 is exploitable, and how bad it is? Exploitability and impact are not fixed properties of a CVE. They depend on runtime truth: whether the vulnerable code is present, reachable, and actually executes in your application. A high CVSS score on a dependency that never runs is not the same as real risk. Kodem, an Intelligent Application Security platform, uses runtime intelligence to reveal which vulnerabilities actually execute in production, so teams prioritize the ones that genuinely matter.
How do I fix CVE-2024-50342?
- Upgrade symfony/http-client to 5.4.47 or later
- Upgrade symfony/http-client to 6.4.15 or later
- Upgrade symfony/http-client to 7.1.8 or later
- Upgrade symfony/symfony to 5.4.47 or later
- Upgrade symfony/symfony to 6.4.15 or later
- Upgrade symfony/symfony to 7.1.8 or later

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