CVE-2023-3603
Last modified
CVE-2023-3603 is a medium-severity vulnerability rated 6.5/10 on the CVSS scale. 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. EPSS estimates a 0.77% chance of exploitation in the next 30 days.
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.
Metrics
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Libssh | Libssh | < 0.8.9 |
References
- https://access.redhat.com/security/cve/CVE-2023-3603Third Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2221791Issue Tracking, Third Party Advisory
- https://access.redhat.com/security/cve/CVE-2023-3603Third Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2221791Issue Tracking, Third Party Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
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