netty: Infinite loop vulnerability when handling renegotiation using SslProvider.OpenSsl
Published Apr 13, 2017
7.5
HIGHCVSS 3.1
EPSS 11.26%
Description
handler/ssl/OpenSslEngine.java in Netty 4.0.x before 4.0.37.Final and 4.1.x before 4.1.1.Final allows remote attackers to cause a denial of service (infinite loop).
Affected products
No data.
Configuration 1
Configuration 2
- 7.1
- 1.0
No data.
Red Hat Fuse 7.7.0
netty
Fixed · RHSA-2020:3192
Red Hat JBoss A-MQ 6.3
n/a
Fixed · RHSA-2017:0179
Red Hat JBoss Data Grid 7.1
n/a
Fixed · RHSA-2017:1097
Red Hat JBoss Fuse 6.3
n/a
Fixed · RHSA-2017:0179
Red Hat BPM Suite 6
netty
Not affected
Red Hat Enterprise Linux OpenStack Platform 7 (Kilo) Operational Tools
netty
Not affected
Red Hat JBoss BRMS 6
netty
Not affected
Red Hat JBoss Data Virtualization 6
netty
Not affected
Red Hat JBoss Enterprise Application Platform 6
netty
Not affected
Red Hat JBoss Enterprise Application Platform 7
netty
Will not fix
Red Hat JBoss Fuse 6
camel
Affected
Red Hat JBoss Fuse Service Works 6
netty
Not affected
Red Hat JBoss Operations Network 3
netty
Will not fix
Red Hat OpenShift Enterprise 2
netty
Not affected
Red Hat OpenStack Platform 10 (Newton)
opendaylight
Not affected
Red Hat OpenStack Platform 8 (Liberty)
opendaylight
Not affected
Red Hat OpenStack Platform 9 (Mitaka)
opendaylight
Not affected
Red Hat Satellite 6
netty
Not affected
Red Hat Software Collections
rh-java-common-netty
Not affected
Red Hat Software Collections
thermostat1-netty
Not affected
Red Hat Subscription Asset Manager
netty
Not affected
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Fuse 7.7.0 | netty | Fixed | RHSA-2020:3192 |
| Red Hat JBoss A-MQ 6.3 | n/a | Fixed | RHSA-2017:0179 |
| Red Hat JBoss Data Grid 7.1 | n/a | Fixed | RHSA-2017:1097 |
| Red Hat JBoss Fuse 6.3 | n/a | Fixed | RHSA-2017:0179 |
| Red Hat BPM Suite 6 | netty | Not affected | n/a |
| Red Hat Enterprise Linux OpenStack Platform 7 (Kilo) Operational Tools | netty | Not affected | n/a |
| Red Hat JBoss BRMS 6 | netty | Not affected | n/a |
| Red Hat JBoss Data Virtualization 6 | netty | Not affected | n/a |
| Red Hat JBoss Enterprise Application Platform 6 | netty | Not affected | n/a |
| Red Hat JBoss Enterprise Application Platform 7 | netty | Will not fix | n/a |
| Red Hat JBoss Fuse 6 | camel | Affected | n/a |
| Red Hat JBoss Fuse Service Works 6 | netty | Not affected | n/a |
| Red Hat JBoss Operations Network 3 | netty | Will not fix | n/a |
| Red Hat OpenShift Enterprise 2 | netty | Not affected | n/a |
| Red Hat OpenStack Platform 10 (Newton) | opendaylight | Not affected | n/a |
| Red Hat OpenStack Platform 8 (Liberty) | opendaylight | Not affected | n/a |
| Red Hat OpenStack Platform 9 (Mitaka) | opendaylight | Not affected | n/a |
| Red Hat Satellite 6 | netty | Not affected | n/a |
| Red Hat Software Collections | rh-java-common-netty | Not affected | n/a |
| Red Hat Software Collections | thermostat1-netty | Not affected | n/a |
| Red Hat Subscription Asset Manager | netty | Not affected | n/a |
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L
AV:N/AC:L/Au:N/C:N/I:N/A:C
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
Score over time
2022–2026- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (15 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 11.26% (0.11259) | 95.84th | v5 (v2026.06.15) |
| Jun 15, 2026 | 11.26% (0.11259) | 95.39th | v5 (v2026.06.15) |
| Mar 30, 2025 | 8.23% (0.08230) | 91.41th | v4 (v2025.03.14) |
| Mar 29, 2025 | 16.89% (0.16895) | 91.65th | v4 (v2025.03.14) |
| Mar 17, 2025 | 8.23% (0.08230) | 91.60th | v4 (v2025.03.14) |
| Jan 1, 2025 | 3.54% (0.03541) | 91.44th | v3 (v2023.03.01) |
| Dec 17, 2024 | 4.95% (0.04952) | 92.71th | v3 (v2023.03.01) |
| Jul 14, 2024 | 1.53% (0.01528) | 87.19th | v3 (v2023.03.01) |
| Apr 25, 2024 | 1.35% (0.01352) | 85.97th | v3 (v2023.03.01) |
| Nov 8, 2023 | 1.15% (0.01152) | 83.17th | v3 (v2023.03.01) |
| Jul 18, 2023 | 1.19% (0.01191) | 83.28th | v3 (v2023.03.01) |
| Mar 7, 2023 | 1.66% (0.01657) | 85.63th | v3 (v2023.03.01) |
| Mar 6, 2023 | 3.38% (0.03384) | 84.41th | v2 (v2022.01.01) |
| Apr 1, 2022 | 3.38% (0.03384) | 82.82th | v2 (v2022.01.01) |
| Feb 4, 2022 | 3.38% (0.03384) | 65.92th | v2 (v2022.01.01) |
References (14)
- http://netty.io/news/2016/06/07/4-0-37-Final.html x_refsource_CONFIRMRelease NotesVendor Advisory
- http://netty.io/news/2016/06/07/4-1-1-Final.html x_refsource_CONFIRMRelease NotesVendor Advisory
- http://rhn.redhat.com/errata/RHSA-2017-0179.html vendor-advisoryx_refsource_REDHATThird Party Advisory
- http://rhn.redhat.com/errata/RHSA-2017-1097.html vendor-advisoryx_refsource_REDHATThird Party Advisory
- http://www.securityfocus.com/bid/96540 vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry
- https://access.redhat.com/security/cve/CVE-2016-4970 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1343616 x_refsource_CONFIRMIssue TrackingThird Party AdvisoryVDB Entry
- https://github.com/advisories/GHSA-rv63-gqm8-9w8q Advisory
- https://github.com/netty/netty/pull/5364 x_refsource_CONFIRMPatchThird Party Advisory
- https://lists.apache.org/thread.html/afaa5860e3a6d327eb96c3d82cbd2f5996de815a16854ed1ad310144%40%3Ccommits.cassandra.apache.org%3E mailing-listx_refsource_MLIST
- https://lists.apache.org/thread.html/afaa5860e3a6d327eb96c3d82cbd2f5996de815a16854ed1ad310144@%3Ccommits.cassandra.apache.org%3E
- https://nvd.nist.gov/vuln/detail/CVE-2016-4970
- https://wiki.opendaylight.org/view/Security_Advisories x_refsource_CONFIRMThird Party Advisory
- https://www.cve.org/CVERecord?id=CVE-2016-4970
Change history (0)
No recorded changes yet.