REDHAT-BUG-1666127
First published: Tue Jan 15 2019(Updated: )
OpenSSH has a vulnerability in the scp client utility. Due to the scp implementation being derived from 1983 rcp, the server chooses which files/directories are sent to the client. However, scp client only perform cursory validation of the object name returned (only directory traversal attacks are prevented). A malicious scp server can overwrite arbitrary files in the scp client target directory. If recursive operation (-r) is performed, the server can manipulate subdirectories as well (for example overwrite .ssh/authorized_keys). External Reference: <a href="https://sintonen.fi/advisories/scp-client-multiple-vulnerabilities.txt">https://sintonen.fi/advisories/scp-client-multiple-vulnerabilities.txt</a> Proposed Patch: <a href="https://sintonen.fi/advisories/scp-name-validator.patch">https://sintonen.fi/advisories/scp-name-validator.patch</a>
| Affected Software | Affected Version | How to fix |
|---|---|---|
| OpenSSH |
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Reference Links
- https://sintonen.fi/advisories/scp-client-multiple-vulnerabilities.txt
- https://sintonen.fi/advisories/scp-name-validator.patch
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1666128
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1666127#c2
- https://access.redhat.com/errata/RHSA-2019:3702
- https://access.redhat.com/security/cve/cve-2019-6111
- https://bugzilla.redhat.com/show_bug.cgi?id=1666127
Frequently Asked Questions
What is the severity of REDHAT-BUG-1666127?
The severity of REDHAT-BUG-1666127 is classified as high due to the potential for unauthorized file access.
How do I fix REDHAT-BUG-1666127?
To fix REDHAT-BUG-1666127, update your OpenSSH installation to a version that includes the security patch addressing this vulnerability.
What software is affected by REDHAT-BUG-1666127?
REDHAT-BUG-1666127 affects the OpenSSH scp client utility.
Can REDHAT-BUG-1666127 lead to a security breach?
Yes, REDHAT-BUG-1666127 can lead to a security breach through potential directory traversal vulnerabilities.
Is it possible to mitigate risks from REDHAT-BUG-1666127?
Yes, users can mitigate risks from REDHAT-BUG-1666127 by implementing strict user permissions and avoiding the use of scp until the vulnerability is patched.
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