3.1
Low
CVE-2023-3603 A missing allocation check in sftp server processing read requests may cause a NULL dereference on low-memory conditions
Description
A missing allocation check in sftp server processing read requests may cause a NULL dereference on low-memory conditions. The malicious client can request up to 4GB SFTP reads, causing allocation of up to 4GB buffers, which was not being checked for failure. This will likely crash the authenticated user's sftp server connection (if implemented as forking as recommended). For thread-based servers, this might also cause DoS for legitimate users. Given this code is not in any released versions, no security releases have been issued.
Affected products and versions
| Product | Affected versions | Fixed in |
|---|---|---|
| libssh | Versions not published | |
| Red Hat Enterprise Linux 7 | Versions not published | |
| Red Hat Enterprise Linux 8 | Versions not published | |
| Red Hat Enterprise Linux 9 | Versions not published | |
| Extra Packages for Enterprise Linux 7 | Versions not published | |
| Fedora | Versions not published |
References
- access.redhat.com access.redhat.com
- RHBZ#2221791 bugzilla.redhat.com
Timeline
- Published
- Last modified
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