CVE-2024-27919
HTTP/2: memory exhaustion due to CONTINUATION frame flood
At a glance
- Source
- NVD
- EPSS
- EPSS 86.75 % · percentile 100 ()
- State
- PUBLISHED
- Published
- Updated
- Assigner
- GitHub_M
- NVD status
- Modified
Description
Envoy is a cloud-native, open-source edge and service proxy. In versions 1.29.0 and 1.29.1, theEnvoy HTTP/2 protocol stack is vulnerable to the flood of CONTINUATION frames. Envoy's HTTP/2 codec does not reset a request when header map limits have been exceeded. This allows an attacker to send an sequence of CONTINUATION frames without the END_HEADERS bit set causing unlimited memory consumption. This can lead to denial of service through memory exhaustion. Users should upgrade to versions 1.29.2 to mitigate the effects of the CONTINUATION flood. Note that this vulnerability is a regression in Envoy version 1.29.0 and 1.29.1 only. As a workaround, downgrade to version 1.28.1 or earlier or disable HTTP/2 protocol for downstream connections.
Weaknesses (CWE)
- CWE-390 — Detection of Error Condition Without Action
References
- https://github.com/envoyproxy/envoy/security/advisories/GHSA-gghf-vfxp-799r
- https://github.com/envoyproxy/envoy/commit/57a02565532c18eb9df972a3e8974be3ae59f2d5
- http://www.openwall.com/lists/oss-security/2024/04/05/3
- http://www.openwall.com/lists/oss-security/2024/04/03/16
- https://www.kb.cert.org/vuls/id/421644
Scores
| Version | Score | Vector | Scored by |
|---|---|---|---|
| CVSS 3.1 | HIGH 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H | GitHub_M |
| CVSS 3.1 | HIGH 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H | NVD · security-advisories@github.com (Secondary) |
European references
- ENISA EUVD · EUVD-2024-25106
- GCVE · GCVE-0-2024-27919
Affected configurations (NVD CPE)
cpe:2.3:a:envoyproxy:envoy:1.29.0:*:*:*:*:*:*:*cpe:2.3:a:envoyproxy:envoy:1.29.1:*:*:*:*:*:*:*
Affected products
| Product | Versions |
|---|---|
| envoyproxy · envoy | affected >= 1.29.0, < 1.29.2 |
Sources
| Source | Licence |
|---|---|
| CVE List (CVEProject cvelistV5) | CVE Program Terms of Use |
| EPSS (FIRST.org) | FIRST — attribution requested |
| ENISA EUVD | ENISA — reproduction authorised, source acknowledged |
| NVD (NIST) via fkie-cad/nvd-json-data-feeds | Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD |