A flaw was found in the OpenSSH package. For each ping packet the SSH server receives, a pong packet is allocated in a memory buffer and stored in a queue of packages. It is only freed when the server/client key exchange has finished. A malicious client may keep sending such packages, leading to an uncontrolled increase in memory consumption on the server side. Consequently, the server may become unavailable, resulting in a denial of service attack.
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No Fix Known
No patch has been released yet. Apply workarounds or mitigations where available.
Published
CVE disclosed publicly
Last Modified
Most recent update
Indexed to CVEInsight
Added to this platform
AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
14
Affected Products
16
References
openbsd / openssh
| - |
| openbsd | openssh | - | - |
| openbsd | openssh | - | - |
| openbsd | openssh | - | - |
| openbsd | openssh | - | - |
| openbsd | openssh | - | - |
| openbsd | openssh | - | - |
| canonical | ubuntu_linux | - | - |
| canonical | ubuntu_linux | - | - |
| debian | debian_linux | - | - |
| debian | debian_linux | - | - |
| debian | debian_linux | - | - |
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
Exploitability
Impact