CVE-2021-30129 — sshd-mina
MEDIUMCVE-2021-30129 is a medium-severity (CVSS 6.5) CWE-772 vulnerability in org.apache.sshd:sshd-mina. A fix is available for org.apache.sshd:sshd-mina — see the affected versions and patch details below.
Buffer Overflow in Apache Mina SSHD
EPSS Exploitation Probability
Probability of exploitation in the next 30 days, from FIRST.org EPSS.
How urgent is this, really
Where this sits among everything scored
Real-World Exposure
org.apache.sshd:sshd-mina☕org.apache.sshd:sshd-coreReal-time download stats are indexed for npm and PyPI packages. This vulnerability affects Maven packages — download data is not available via public APIs for these ecosystems.
Description
A vulnerability in sshd-core of Apache Mina SSHD allows an attacker to overflow the server causing an OutOfMemory error. This issue affects the SFTP and port forwarding features of Apache Mina SSHD version 2.0.0 and later versions. It was addressed in Apache Mina SSHD 2.7.0
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| ☕Maven | org.apache.sshd:sshd-mina | ≥ 2.0.0&&< 2.7.0 | 2.7.0org.apache.sshd:sshd-mina:2.7.0 |
| ☕Maven | org.apache.sshd:sshd-core | ≥ 2.0.0&&< 2.7.0 | 2.7.0org.apache.sshd:sshd-core:2.7.0 |
Affected Products
sshdapachebanking paymentsoraclebanking trade financeoraclebanking treasury managementoraclecommunications cloud native core consoleoracleflexcube universal bankingoracleDetection & mitigation playbook
Open-source dependencyDetect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for org.apache.sshd:sshd-mina, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Fix
Update org.apache.sshd:sshd-mina to 2.7.0 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2021-30129 is resolved across your whole dependency graph.
Workarounds
Constrain what reaches the vulnerable code: limit the size and shape of untrusted input, isolate the affected component in a sandboxed or least-privileged process, and enable the platform's memory-safety mitigations (ASLR, stack protector, hardened allocator) so an out-of-bounds access is more likely to fail closed than to be exploitable.
Fixing This On Your OS
If you run this on a Linux distribution, patch through your package manager against the distro's own security advisory below — it tracks the exact backported fix for your release, which can ship on a different timeline (and sometimes a different severity) than the upstream project.
Red Hat OpenStack Platform's OpenDaylight will not be updated for this flaw because it was deprecated as of OpenStack Platform 14 and is only receiving security fixes for Critical flaws.
| Product | Fixed in | Advisory |
|---|---|---|
| Red Hat Fuse 7.10 | sshd-core | RHSA-2021:5134 |
| Red Hat JBoss Enterprise Application Platform | org.apache.sshd/sshd-core:2.7.0.redhat-00001 | RHSA-2021:4679 |
| Red Hat JBoss Enterprise Application Platform 7.4 for RHEL 8 | eap7-apache-sshd-0:2.7.0-1.redhat_00001.1.el8eap | RHSA-2021:4677 |
| Red Hat JBoss Enterprise Application Platform 7.4 on RHEL 7 | eap7-apache-sshd-0:2.7.0-1.redhat_00001.1.el7eap | RHSA-2021:4676 |
| RHINT Camel-Q 2.2.1 | see advisory | RHSA-2022:1013 |
| RHPAM 7.13.4 async | sshd-core | RHSA-2023:4983 |
Frequently Asked Questions
Is CVE-2021-30129 in your dependencies?
Find it across Maven, including transitive dependencies.