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CVE-2021-37136

Affected software8 products, listed below
Severity7.5 High CVSS 3.1 2 scores
Fixed in4.1.68.Final
WeaknessUncontrolled resource consumption (CWE-400)
Published19 Oct 2021
Updated8 Oct 2026

Description

The Bzip2 decompression decoder function doesn't allow setting size restrictions on the decompressed output data (which affects the allocation size used during decompression). All users of Bzip2Decoder are affected. The malicious input can trigger an OOME and so a DoS attack

Exploitation status

No public exploit

No exploit has been reported in the sources we check. Published 5 years ago.

  • CISA KEV not listed
  • VulnCheck KEV not listed
  • CISA Vulnrichment exploitation: none
  • Indexed PoC none indexed
  • EPSS 5.9% chance in 30 days

Waratek protection

Protected by Waratek

Waratek has a rule that blocks attacks on this vulnerability.

  • Protection full
  • Action available security rule
  • Review human Researcher
  • Record active
Decided by Manual classification of this CVE in the legacy dataset
Finding A manual classification set this CVE's status to Protected by Waratek.

How to mitigate CVE-2021-37136

Upgrade the affected software to 4.1.68.Final or later. Until you can, Waratek RASP blocks exploitation with a security rule that blocks this kind of attack. It runs inside the Java application, with no code changes.

Waratek RASP Runtime protection for Java applications

CVSS

7.5 HIGH v3.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H 2 metrics

We show the highest score from the newest CVSS version. Scores from different versions can't be compared, and the first score listed is sometimes a 0.0 placeholder.

VersionScoreBandVectorAssignerType
CVSS 3.1 7.5 HIGH CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H NVD Primary published
CVSS 2.0 5.0 none AV:N/AC:L/Au:N/C:N/I:N/A:P NVD Primary

Affected software and releases

Oracle advisories

AdvisoryTypeQuarterProducts Oracle names in its risk matrix
Oracle Critical Patch Update October 2024 ↗ CPU 2024-Q4 Oracle Communications Applications / Core (Snappy) (5.5.0-5.5.22, 6.0.0-6.0.3)
Oracle Critical Patch Update October 2023 ↗ CPU 2023-Q4 Oracle Fusion Middleware / Centralized Thirdparty Jars (Netty) (12.2.1.4.0)
Oracle Critical Patch Update April 2023 ↗ CPU 2023-Q2 Oracle Communications Applications / Core (Apache Kafka) (5.5.0-5.5.10, 6.0.0-6.0.2)

Oracle components and versions

FamilyComponentVersions, as Oracle lists themRead as
Oracle Communications Applications Core (Apache Kafka) 5.5.0-5.5.10, 6.0.0-6.0.2
Oracle Communications Applications Core (Snappy) 5.5.0-5.5.22, 6.0.0-6.0.3
Oracle Fusion Middleware Centralized Thirdparty Jars (Netty) 12.2.1.4.0 12.2.1.4.0

Maven packages

Affected and fixed versions, from OSV.dev
PackageIntroducedFixedLast affected
io.netty:netty-codec 0 4.1.68.Final unbounded
org.jboss.netty:netty 0 none unbounded
io.netty:netty 0 none unbounded

Products and versions

22 products, 41 version entries
SourceVendorProductSchemeAffected versions
nvd debian debian linux generic 10.0 · 11.0
osv io.netty netty generic any version
osv io.netty netty-codec generic < 4.1.68
nvd netapp oncommand insight generic any version
nvd netty netty generic < 4.1.68
nvd oracle banking apis generic ≥ 18.1 and ≤ 18.3 · 19.1 · 19.2 · 20.1 · 21.1
nvd oracle banking digital experience generic 18.1 · 18.2 · 18.3 · 19.1 · 19.2 · 20.1 · 21.1
nvd oracle coherence generic 12.2.1.4.0 · 14.1.1.0.0
nvd oracle commerce guided search generic 11.3.2
nvd oracle communications brm - elastic charging engine generic < 12.0.0.4.6 · 12:0.0.5.0
nvd oracle communications cloud native core binding support function generic 1.10.0 · 1.11.0
nvd oracle communications cloud native core network slice selection function generic 1.8.0
nvd oracle communications cloud native core policy generic 1.15.0
nvd oracle communications cloud native core security edge protection proxy generic 1.7.0
nvd oracle communications cloud native core unified data repository generic 1.15.0
nvd oracle communications diameter signaling router generic ≥ 8.0.0.0 and ≤ 8.5.0.2
nvd oracle communications instant messaging server generic 8.1
nvd oracle helidon generic 1.4.10 · 2.4.0
nvd oracle peoplesoft enterprise peopletools generic 8.48 · 8.57 · 8.58 · 8.59
nvd oracle webcenter portal generic 12.2.1.3.0 · 12.2.1.4.0
osv org.jboss.netty netty generic any version
nvd quarkus quarkus generic < 2.2.4

References

URLTags
https://github.com/netty/netty/security/advisories/GHSA-grg4-wf29-r9vv WEB
https://github.com/netty/netty/commit/41d3d61a61608f2223bb364955ab2045dd5e4020 WEB
https://www.oracle.com/security-alerts/cpujul2022.html WEB
https://www.oracle.com/security-alerts/cpujan2022.html WEB
https://www.oracle.com/security-alerts/cpuapr2022.html WEB
https://www.debian.org/security/2023/dsa-5316 WEB
https://security.netapp.com/advisory/ntap-20220210-0012 WEB
https://lists.debian.org/debian-lts-announce/2023/01/msg00008.html WEB
https://lists.apache.org/thread.html/rfb2bf8597e53364ccab212fbcbb2a4e9f0a9e1429b1dc08023c6868e@%3Cdev.tinkerpop.apache.org%3E WEB
https://lists.apache.org/thread.html/rd262f59b1586a108e320e5c966feeafbb1b8cdc96965debc7cc10b16@%3Ccommits.druid.apache.org%3E WEB

Timeline

Published2021-10-19By the CVE Program.
NVD record modified2026-10-08NVD's own last-modified date for this record.