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-lenandclient-query-buffer-limitconfiguration 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-serverexecutable is to prevent users from modifying theproto-max-bulk-lenconfiguration parameter. This can be done using ACL to restrict unprivileged users from using theCONFIG SETcommand.Credit
This issue was discovered and reported by sundb.
References
An additional workaround to mitigate the problem without patching the
redis-serverexecutable is to prevent users from modifying theproto-max-bulk-lenconfiguration parameter. This can be done using ACL to restrict unprivileged users from using theCONFIG SETcommand.For more information
If you have any questions or comments about this advisory: