Denial of service in Apache Mina SSHD



Published: 2021-09-29
Risk Medium
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2021-30129
CWE-ID CWE-119
Exploitation vector Network
Public exploit N/A
Vulnerable software
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Apache Mina SSHD
Server applications / Remote management servers, RDP, SSH

Vendor Apache Foundation

Security Bulletin

This security bulletin contains one medium risk vulnerability.

1) Buffer overflow

EUVDB-ID: #VU56931

Risk: Medium

CVSSv3.1: 6.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-30129

CWE-ID: CWE-119 - Improper Restriction of Operations within the Bounds of a Memory Buffer

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to a boundary error in the sshd-core of Apache Mina SSHD. A remote attacker can send specially crafted requests to the server, trigger buffer overflow and perform a denial of service (DoS) attack.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Apache Mina SSHD: 2.0.0, 2.1.0, 2.2.0, 2.3.0, 2.4.0, 2.5.0, 2.5.1, 2.6.0

CPE2.3 External links

http://lists.apache.org/thread.html/r6d4f78e192a0c8eabd671a018da464024642980ecd24096bde6db36f%40%3Cusers.mina.apache.org%3E
http://lists.apache.org/thread.html/r6d4f78e192a0c8eabd671a018da464024642980ecd24096bde6db36f@%3Cusers.mina.apache.org%3E
http://lists.apache.org/thread.html/red01829efa2a8c893c4baff4f23c9312bd938543a9b8658e172b853b@%3Cannounce.apache.org%3E
http://www.openwall.com/lists/oss-security/2021/07/12/1
http://github.com/advisories/GHSA-9279-7hph-r3xw

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

How the attacker can exploit this vulnerability?

The attacker would have to send a specially crafted request to the affected application in order to exploit this vulnerability.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.



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