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Test your applicationsUpgrade SLES:15.6
openssh-fips
to version 9.6p1-150600.6.15.2 or higher.
Note: Versions mentioned in the description apply only to the upstream openssh-fips
package and not the openssh-fips
package as distributed by SLES
.
See How to fix?
for SLES:15.6
relevant fixed versions and status.
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.