GHSA-4vwx-54mw-vqfw CVE-2024-28869 GO-2024-2722
Traefik vulnerable to denial of service with Content-length header
- Severity
- 7.5 / 10
- High · CVSS 3.1
- Exploit chance (EPSS)
- 1.05%
- Chance of exploitation in the next 30 days. Higher than 64.20% of scored vulnerabilities.
- Known exploited
- No
- Not in CISA's catalog
- Weakness
- CWE-404 Improper Resource Shutdown or Release
- CWE-755 Improper Handling of Exceptional Conditions
- Fix
- Available
- 3 packages have a fixed version
Description
There is a potential vulnerability in Traefik managing requests with Content-length and no body .
Sending a GET request to any Traefik endpoint with the Content-length request header results in an indefinite hang with the default configuration. This vulnerability can be exploited by attackers to induce a denial of service.
Patches
- https://github.com/traefik/traefik/releases/tag/v2.11.2
- https://github.com/traefik/traefik/releases/tag/v3.0.0-rc5
Workarounds
For affected versions, this vulnerability can be mitigated by configuring the readTimeout option.
For more information
If you have any questions or comments about this advisory, please open an issue.
Affected versions
Go
| Package | Vulnerable | Fixed in |
|---|---|---|
| github.com/traefik/traefik | < 2.11.2 |
2.11.2 |
| github.com/traefik/traefik | all versions |
No fix yet |
| github.com/traefik/traefik/v2 | < 2.11.2 |
2.11.2 |
| github.com/traefik/traefik/v3 | >= 3.0.0-beta3, < 3.0.0-rc5 |
3.0.0-rc5 |
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.
github.com/traefik/traefik Go → 2.11.2
- go
go get github.com/traefik/traefik@v2.11.2 && go mod tidy
github.com/traefik/traefik/v2 Go → 2.11.2
- go
go get github.com/traefik/traefik/v2@v2.11.2 && go mod tidy
github.com/traefik/traefik/v3 Go → 3.0.0-rc5
- go
go get github.com/traefik/traefik/v3@v3.0.0-rc5 && go mod tidy
Severity breakdown
CVSS 3.1 7.5
CVSS:3.1/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
- None
- Integrity
- None
- Availability
- High
Weakness
CWE-404: Improper Resource Shutdown or Release
The product does not release or incorrectly releases a resource before it is made available for re-use.
How to prevent it
- Requirements: Use a language that does not allow this weakness to occur or provides constructs that make this weakness easier to avoid. For example, languages such as Java, Ruby, and Lisp perform automatic garbage collection that releases memory for objects that have been deallocated.
- Implementation: It is good practice to be responsible for freeing all resources you allocate and to be consistent with how and where you free memory in a function. If you allocate memory that you intend to free upon completion of the function, you must be sure to free the memory at all exit points for that function including error conditions.
- Implementation: Memory should be allocated/freed using matching functions such as malloc/free, new/delete, and new[]/delete[].
- Implementation: When releasing a complex object or structure, ensure that you properly dispose of all of its member components, not just the object itself.
CWE-755: Improper Handling of Exceptional Conditions
The product does not handle or incorrectly handles an exceptional condition.
References
Advisories
Packages
Other links
Timeline
- Published
- Last updated by the source
- Latest EPSS score
Related advisories
| Advisory | Severity | Why it's related |
|---|---|---|
| GO-2026-6558 Traefik: BasicAuth singleflight coalescing reintroduces an unauthenticated username-enumeration timing oracle | Medium | Also affects github.com/traefik/traefik |
| GHSA-f52w-8j3h-j724 Traefik: Rootless HTTP/1 request-target routes as "/" but is forwarded verbatim, bypassing path-scoped routing, middleware guards and access logging | High | Also affects github.com/traefik/traefik |
| GHSA-w4v4-9rw7-5326 Traefik: Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling') and Incorrect Authorization | Critical | Also affects github.com/traefik/traefik |
| GHSA-qqjf-53cj-pwvv Traefik HTTP/3 Backend NTLM Connection Reuse | Critical | Also affects github.com/traefik/traefik |
| GO-2026-6467 Traefik entrypoint header-name sanitization bypassed via request trailers | High | Also affects github.com/traefik/traefik |
| GHSA-rf44-j88r-hh8c Traefik: ForwardAuth identity spoofing via dot-form header alias | High | Also affects github.com/traefik/traefik |
| GHSA-7ghq-v6jf-g56c Traefik: respondingTimeouts.readTimeout is not applied to HTTP/3, leaving slow-body uploads unbounded | Medium | Also affects github.com/traefik/traefik |
| GHSA-62fc-8686-hfmq Traefik: `allowCrossNamespace=false` bypass via `@kubernetescrd` TraefikService backendRef | Medium | Also affects github.com/traefik/traefik |
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