CVE-2020-11612
HIGHCVSS 7.5/10EPSS 9.44%
Last modified
CVE-2020-11612 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. The ZlibDecoders in Netty 4.1.x before 4.1.46 allow for unbounded memory allocation while decoding a ZlibEncoded byte stream. An attacker could send a large ZlibEncoded byte stream to the Netty server, forcing the server to allocate all of its free memory to a single decoder.. EPSS estimates a 9.44% chance of exploitation in the next 30 days.
Description
The ZlibDecoders in Netty 4.1.x before 4.1.46 allow for unbounded memory allocation while decoding a ZlibEncoded byte stream. An attacker could send a large ZlibEncoded byte stream to the Netty server, forcing the server to allocate all of its free memory to a single decoder.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Netty | Netty | >= 4.1, < 4.1.46 |
| Debian | Debian Linux | 9.0 |
| Debian | Debian Linux | 10.0 |
| Fedoraproject | Fedora | 33 |
| Netapp | Oncommand Api Services | All versions |
| Netapp | Oncommand Insight | All versions |
| Netapp | Oncommand Workflow Automation | All versions |
| Oracle | Communications Brm - Elastic Charging Engine | 12.0.0.3 |
| Oracle | Communications Cloud Native Core Service Communication Proxy | 1.5.2 |
| Oracle | Communications Design Studio | 7.4.2 |
| Oracle | Nosql Database | < 20.3 |
| Oracle | Siebel Core - Server Framework | < 21.5 |
| Oracle | Webcenter Portal | 12.2.1.3.0 |
| Oracle | Webcenter Portal | 12.2.1.4.0 |
| Oracle | Communications Messaging Server | 8.1 |
References
- https://github.com/netty/netty/compare/netty-4.1.45.Final...netty-4.1.46.FinalPatch, Third Party Advisory
- https://github.com/netty/netty/issues/6168Third Party Advisory
- https://github.com/netty/netty/pull/9924Patch, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2020/09/msg00003.htmlMailing List, Third Party Advisory
- https://security.netapp.com/advisory/ntap-20201223-0001/Third Party Advisory
- https://www.debian.org/security/2021/dsa-4885Third Party Advisory
- https://www.oracle.com//security-alerts/cpujul2021.htmlPatch, Third Party Advisory
- https://www.oracle.com/security-alerts/cpuApr2021.htmlPatch, Third Party Advisory
- https://www.oracle.com/security-alerts/cpuapr2022.htmlThird Party Advisory
- https://www.oracle.com/security-alerts/cpujan2021.htmlPatch, Third Party Advisory
- https://github.com/netty/netty/compare/netty-4.1.45.Final...netty-4.1.46.FinalPatch, Third Party Advisory
- https://github.com/netty/netty/issues/6168Third Party Advisory
- https://github.com/netty/netty/pull/9924Patch, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2020/09/msg00003.htmlMailing List, Third Party Advisory
- https://security.netapp.com/advisory/ntap-20201223-0001/Third Party Advisory
- https://www.debian.org/security/2021/dsa-4885Third Party Advisory
- https://www.oracle.com//security-alerts/cpujul2021.htmlPatch, Third Party Advisory
- https://www.oracle.com/security-alerts/cpuApr2021.htmlPatch, Third Party Advisory
- https://www.oracle.com/security-alerts/cpuapr2022.htmlThird Party Advisory
- https://www.oracle.com/security-alerts/cpujan2021.htmlPatch, Third Party Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2020-11612?
The ZlibDecoders in Netty 4.1.x before 4.1.46 allow for unbounded memory allocation while decoding a ZlibEncoded byte stream. An attacker could send a large ZlibEncoded byte stream to the Netty server, forcing the server to allocate all of its free memory to a single decoder.
How severe is CVE-2020-11612?
CVE-2020-11612 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 9.44% probability of exploitation in the next 30 days.
How do I fix CVE-2020-11612?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
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Are you affected by CVE-2020-11612?
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