CVE-2020-11612
HIGH
7.5
CVSS Score
Published: April 7, 2020 at 06:00 PM UTC
Updated: June 17, 2026 at 02:50 AM UTC
13 products affected across 5 vendorsDebian LinuxFedoraOnCommand Insight
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Severity
HIGH7.5
Exploit prediction
EPSS 9%
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.
Affected
Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.
Debian Linux· Debiandrupal
95%95%
All versions
95%
All versions
All versions
4.1 ≤ v < 4.1.46
Affected range stops below 4.1.46, so it looks safe — our inference, not a vendor statement
Remediation
No guide yetNo remediation guidance has been written for this CVE yet. What the record does show:
Patch and advisory references
- https://github.com/netty/netty/compare/netty-4.1.45.Final...netty-4.1.46.Final
- https://github.com/netty/netty/pull/9924
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TS6VX7OMXPDJIU5LRGUAHRK6MENAVJ46/
- https://www.debian.org/security/2021/dsa-4885
- https://www.oracle.com//security-alerts/cpujul2021.html
References (45)
x_refsource_MISCPatchThird Party Advisory
Source: [email protected]
https://github.com/netty/netty/compare/netty-4.1.45.Final...netty-4.1.46.Finalx_refsource_MISCThird Party Advisory
Source: [email protected]
https://github.com/netty/netty/issues/6168x_refsource_MISCPatchThird Party Advisory
Source: [email protected]
https://github.com/netty/netty/pull/9924Mailing Listx_refsource_MLIST
Source: [email protected]
https://lists.apache.org/thread.html/r14446ed58208cb6d97b6faa6ebf145f1cf2c70c0886c0c133f4d3b6f%40%3Ccommits.druid.apache.org%3EMailing Listx_refsource_MLIST
Source: [email protected]
https://lists.apache.org/thread.html/r255ed239e65d0596812362adc474bee96caf7ba042c7ad2f3c62cec7%40%3Cissues.zookeeper.apache.org%3EMailing Listx_refsource_MLIST
Source: [email protected]
https://lists.apache.org/thread.html/r281882fdf9ea89aac02fd2f92786693a956aac2ce9840cce87c7df6b%40%3Ccommits.zookeeper.apache.org%3EMailing Listx_refsource_MLIST
Source: [email protected]
https://lists.apache.org/thread.html/r2958e4d49ee046e1e561e44fdc114a0d2285927501880f15852a9b53%40%3Ccommits.druid.apache.org%3ECVSS
- Attack Vector
- NETWORK
- Complexity
- LOW
- Privileges
- NONE
- User Interaction
- NONE
- Scope
- UNCHANGED
- Confidentiality
- NONE
- Integrity
- NONE
- Availability
- HIGH
Vector?
Quick Info
StatusMODIFIED
CWE
CWE-770
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