CVE-2020-11612

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.

Category

7.5
CVSS
Severity: High
CVSS 3.1 •
CVSS 2.0 •
EPSS 1.85% Top 20%
Vendor Advisory fedoraproject.org Vendor Advisory debian.org
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
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https://lists.debian.org/debian-lts-announce/2020/09/msg00003.html third party advisory mailing list
https://lists.apache.org/thread.html/raaac04b7567c554786132144bea3dcb72568edd410c1e6f0101742e7%40%3Cissues.flink.apache.org%3E mailing list
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https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TS6VX7OMXPDJIU5LRGUAHRK6MENAVJ46/ vendor advisory
https://www.oracle.com/security-alerts/cpujan2021.html third party advisory patch
https://github.com/netty/netty/issues/6168 third party advisory
https://github.com/netty/netty/pull/9924 third party advisory patch
https://github.com/netty/netty/compare/netty-4.1.45.Final...netty-4.1.46.Final third party advisory patch
https://lists.apache.org/thread.html/r31424427cc6d7db46beac481bdeed9a823fc20bb1b9deede38557f71%40%3Cnotifications.zookeeper.apache.org%3E
https://security.netapp.com/advisory/ntap-20201223-0001/ third party advisory
https://lists.apache.org/thread.html/r832724df393a7ef25ca4c7c2eb83ad2d6c21c74569acda5233f9f1ec%40%3Ccommits.pulsar.apache.org%3E mailing list
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https://www.debian.org/security/2021/dsa-4885 third party advisory vendor advisory
https://www.oracle.com/security-alerts/cpuApr2021.html third party advisory patch
https://www.oracle.com//security-alerts/cpujul2021.html third party advisory patch
https://www.oracle.com/security-alerts/cpuapr2022.html third party advisory

Frequently Asked Questions

What is the severity of CVE-2020-11612?
CVE-2020-11612 has been scored as a high severity vulnerability.
How to fix CVE-2020-11612?
To fix CVE-2020-11612, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2020-11612 being actively exploited in the wild?
It is possible that CVE-2020-11612 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~2% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
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