GHSA-cxrh-j4jr-qwg3 CVE-2025-47279
undici Denial of Service attack via bad certificate data
- Severity
- 3.1 / 10
- Low · CVSS 3.1
- Exploit chance (EPSS)
- 0.34%
- Chance of exploitation in the next 30 days. Higher than 27.32% of scored vulnerabilities.
- Known exploited
- No
- Not in CISA's catalog
- Weakness
- CWE-401 Missing Release of Memory after Effective Lifetime
- Fix
5.29.0- Upgrade undici to this version or later
Description
Impact
Applications that use undici to implement a webhook-like system are vulnerable. If the attacker set up a server with an invalid certificate, and they can force the application to call the webhook repeatedly, then they can cause a memory leak.
Patches
This has been patched in https://github.com/nodejs/undici/pull/4088.
Workarounds
If a webhook fails, avoid keep calling it repeatedly.
References
Reported as: https://github.com/nodejs/undici/issues/3895
Affected versions
npm
| Package | Vulnerable | Fixed in |
|---|---|---|
| undici | < 5.29.0 |
5.29.0 |
| undici | >= 6.0.0, < 6.21.2 |
6.21.2 |
| undici | >= 7.0.0, < 7.5.0 |
7.5.0 |
| undici | < 5.29.0 |
5.29.0 |
| undici | >= 6.0.0, < 6.21.2 |
6.21.2 |
| undici | >= 7.0.0, < 7.5.0 |
7.5.0 |
How to fix
Move to the fixed version or later with your package manager, update the lockfile, and run your tests. If the package only arrives through another dependency, upgrade that dependency first. If none of its releases pulls a fixed version yet, force the version with your package manager's override.
undici npm → 5.29.0
- npm
npm install undici@5.29.0- yarn
yarn add undici@5.29.0- pnpm
pnpm add undici@5.29.0
Severity breakdown
CVSS 3.1 3.1
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:L
- Attack vector
- Network
- Attack complexity
- High
- Privileges required
- Low
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- None
- Integrity
- None
- Availability
- Low
Weakness
CWE-401: Missing Release of Memory after Effective Lifetime
The product does not sufficiently track and release allocated memory after it has been used, making the memory unavailable for reallocation and reuse.
How to prevent it
- Implementation: Choose a language or tool that provides automatic memory management, or makes manual memory management less error-prone. For example, glibc in Linux provides protection against free of invalid pointers. When using Xcode to target OS X or iOS, enable automatic reference counting (ARC) [REF-391]. To help correctly and consistently manage memory when programming in C++, consider using a smart pointer class such as std::auto_ptr (defined by ISO/IEC ISO/IEC 14882:2003), std::shared_ptr and std::unique_ptr (specified by an upcoming revision of the C++ standard, informally referred to as C++ 1x), or equivalent solutions such as Boost.
- Architecture and Design: Use an abstraction library to abstract away risky APIs. Not a complete solution.
- Architecture and Design, Build and Compilation: Consider using the Boehm-Demers-Weiser garbage collector (bdwgc), which can help avoid leaks.
References
Advisories
Fixes and patches
Packages
Other links
Timeline
- Published
- Last updated by the source
- Latest EPSS score
Related advisories
| Advisory | Severity | Why it's related |
|---|---|---|
| GHSA-55wc-3pg8-jfw6 undici vulnerable to Denial of Service via unhandled exception in the decompress interceptor | High | Also affects undici |
| GHSA-qrxm-fqhp-jwvm undici vulnerable to Denial of Service via TLS 1.2 certificate-changing renegotiation | High | Also affects undici |
| GHSA-9fm3-97px-rjf6 undici WebSocket client vulnerable to Denial of Service via unbounded automatic PONG buffering | High | Also affects undici |
| GHSA-4qv8-2p9j-2685 undici vulnerable to Denial of Service via unbounded memory in the EventSource parser | High | Also affects undici |
| GHSA-xjj6-f33q-929c undici vulnerable to Denial of Service via unhandled error on excessive content-encodings | High | Also affects undici |
| GHSA-f72v-6w45-q472 undici vulnerable to Subresource Integrity bypass via non-lowercase algorithm tokens | High | Also affects undici |
| GHSA-4w7w-5xrc-9h26 undici vulnerable to cache poisoning and cross-user disclosure via cross-origin redirects | Critical | Also affects undici |
| GHSA-2m5v-pch6-74hx undici vulnerable to TLS certificate validation bypass via dropped tls options in Agent | Critical | Also affects undici |
Credits: mcollina, styfle
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