CVE-2022-29225: Zip bomb vulnerability in Envoy
First published: Fri May 20 2022(Updated: )
A flaw was found in Envoy. A specifically constructed HTTP body delivered by an untrusted downstream or upstream peer whose decompressed size is dramatically larger than the compressed size can be sent by an attacker to cause a denial of service.
Credit: security-advisories@github.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| redhat/Envoy | <1.22.1 | 1.22.1 |
| redhat/Envoy | <1.21.3 | 1.21.3 |
| redhat/Envoy | <1.20.4 | 1.20.4 |
| redhat/Envoy | <1.19.5 | 1.19.5 |
| redhat/servicemesh-proxy | <0:2.0.10-1.el8 | 0:2.0.10-1.el8 |
| redhat/servicemesh-proxy | <0:2.1.3-1.el8 | 0:2.1.3-1.el8 |
| Envoyproxy Envoy | <1.22.1 |
Remedy
This can be mitigated by disabling decompression in Envoy.
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Reference Links
- https://github.com/envoyproxy/envoy/commit/cb4ef0b09200c720dfdb07e097092dd105450343
- https://github.com/envoyproxy/envoy/security/advisories/GHSA-75hv-2jjj-89hh
- https://access.redhat.com/errata/RHSA-2022:5003
- https://access.redhat.com/errata/RHSA-2022:5004
- https://access.redhat.com/security/cve/cve-2022-29225
- https://bugzilla.redhat.com/show_bug.cgi?id=2088737
- https://www.cve.org/CVERecord?id=CVE-2022-29225 https://nvd.nist.gov/vuln/detail/CVE-2022-29225 https://github.com/envoyproxy/envoy/security/advisories/GHSA-75hv-2jjj-89hh
Frequently Asked Questions
What is CVE-2022-29225?
CVE-2022-29225 is a vulnerability found in Envoy, a cloud-native high-performance proxy, where compressors accumulate decompressed data into an intermediate buffer before overwriting the body in the decode/encodeBody, potentially allowing an attacker to zip bomb the decompressor.
How does CVE-2022-29225 impact Envoy?
CVE-2022-29225 can allow an attacker to zip bomb the decompressor of Envoy by sending a small highly compressed payload, potentially causing resource exhaustion and denial of service.
What is the severity of CVE-2022-29225?
The severity of CVE-2022-29225 is high, with a CVSS score of 7.5.
Which versions of Envoy are affected by CVE-2022-29225?
Versions of Envoy prior to 1.22.1 are affected by CVE-2022-29225.
How can I mitigate the CVE-2022-29225 vulnerability?
To mitigate CVE-2022-29225, it is recommended to update Envoy to version 1.22.1 or later.
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