Impact
An integer overflow bug in Redis 5.0 or newer can be exploited to corrupt the heap and potentially result with remote code execution.
The vulnerability involves changing the default proto-max-bulk-len
and client-query-buffer-limit
configuration parameters to very large values and constructing specially crafted very large stream elements.
Patches
The problem is fixed in Redis 6.2.6, 6.0.16 and 5.0.14.
Workarounds
An additional workaround to mitigate the problem without patching the redis-server
executable is to prevent users from modifying the proto-max-bulk-len
configuration parameter. This can be done using ACL to restrict unprivileged users from using the CONFIG SET
command.
Credit
This issue was discovered and reported by sundb.
References
An additional workaround to mitigate the problem without patching the redis-server
executable is to prevent users from modifying the proto-max-bulk-len
configuration parameter. This can be done using ACL to restrict unprivileged users from using the CONFIG SET
command.
For more information
If you have any questions or comments about this advisory:
Impact
An integer overflow bug in Redis 5.0 or newer can be exploited to corrupt the heap and potentially result with remote code execution.
The vulnerability involves changing the default
proto-max-bulk-len
andclient-query-buffer-limit
configuration parameters to very large values and constructing specially crafted very large stream elements.Patches
The problem is fixed in Redis 6.2.6, 6.0.16 and 5.0.14.
Workarounds
An additional workaround to mitigate the problem without patching the
redis-server
executable is to prevent users from modifying theproto-max-bulk-len
configuration parameter. This can be done using ACL to restrict unprivileged users from using theCONFIG SET
command.Credit
This issue was discovered and reported by sundb.
References
An additional workaround to mitigate the problem without patching the
redis-server
executable is to prevent users from modifying theproto-max-bulk-len
configuration parameter. This can be done using ACL to restrict unprivileged users from using theCONFIG SET
command.For more information
If you have any questions or comments about this advisory: