Impact
An integer overflow bug in the ziplist data structure used by all versions of Redis can be exploited to corrupt the heap and potentially result with remote code execution.
The vulnerability involves modifying the default ziplist configuration parameters (hash-max-ziplist-entries, hash-max-ziplist-value, zset-max-ziplist-entries or zset-max-ziplist-value) to a very large value, and then constructing specially crafted commands to create very large ziplists.
Patches
The problem is fixed in Redis versions 6.2.6, 6.0.16, 5.0.14.
Workarounds
An additional workaround to mitigate the problem without patching the redis-server executable is to prevent users from modifying the above configuration parameters. 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.
For more information
If you have any questions or comments about this advisory:
sundb Analyst
Impact
An integer overflow bug in the ziplist data structure used by all versions of Redis can be exploited to corrupt the heap and potentially result with remote code execution.
The vulnerability involves modifying the default ziplist configuration parameters (
hash-max-ziplist-entries,hash-max-ziplist-value,zset-max-ziplist-entriesorzset-max-ziplist-value) to a very large value, and then constructing specially crafted commands to create very large ziplists.Patches
The problem is fixed in Redis versions 6.2.6, 6.0.16, 5.0.14.
Workarounds
An additional workaround to mitigate the problem without patching the
redis-serverexecutable is to prevent users from modifying the above configuration parameters. This can be done using ACL to restrict unprivileged users from using theCONFIG SETcommand.Credit
This issue was discovered and reported by sundb.
For more information
If you have any questions or comments about this advisory: