CVE-2020-12062: Input Validation
First published: Mon Jun 01 2020(Updated: )
** DISPUTED ** The scp client in OpenSSH 8.2 incorrectly sends duplicate responses to the server upon a utimes system call failure, which allows a malicious unprivileged user on the remote server to overwrite arbitrary files in the client's download directory by creating a crafted subdirectory anywhere on the remote server. The victim must use the command scp -rp to download a file hierarchy containing, anywhere inside, this crafted subdirectory. NOTE: the vendor points out that "this attack can achieve no more than a hostile peer is already able to achieve within the scp protocol" and "utimes does not fail under normal circumstances."
Credit: cve@mitre.org cve@mitre.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Openbsd Openssh | =8.2 | |
| =8.2 |
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Reference Links
Frequently Asked Questions
What is the vulnerability ID for this OpenSSH vulnerability?
The vulnerability ID for this OpenSSH vulnerability is CVE-2020-12062.
What is the severity rating of CVE-2020-12062?
The severity rating of CVE-2020-12062 is high with a score of 7.5.
What is the affected software?
The affected software is OpenSSH version 8.2.
How can a malicious user exploit CVE-2020-12062?
A malicious unprivileged user on the remote server can exploit CVE-2020-12062 by creating a crafted subdirectory, leading to the overwriting of arbitrary files in the client's download directory.
Are there any fixes or patches available for CVE-2020-12062?
Yes, OpenSSH has released patches for this vulnerability. Please refer to the OpenSSH website for more information.
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