CVE-2019-16161

A NULL pointer dereference vulnerability was found in Onigmo in the way it handled certain types of "subexp" regular expressions. A remote attacker could exploit this flaw by providing a malformed regular expression that when processed by an application linked to Onigmo, would crash the application, causing a denial of service.

This flaw does not affect the versions of oniguruma (embedded in php:7.2/php) as shipped with Red Hat Enterprise Linux 8 as they do not include the vulnerable code, which was introduced in a newer version of the package. The same is true for the versions of oniguruma as shipped with Red Hat Enterprise Linux 6, the versions of oniguruma (embedded in php and php53) as shipped with Red Hat Enterprise Linux 5, 6, and 7, and the versions of oniguruma (embedded in rh-php72-php) as shipped with Red Hat Software Collections 3.

This flaw does not affect the versions of oniguruma as shipped with Red Hat Enterprise Linux 8 as they already include the patch. The same is true for the versions of oniguruma (embedded in php:7.3/php) as shipped with Red Hat Enterprise Linux 8 and the versions of oniguruma (embedded in rh-php73-php) as shipped with Red Hat Software Collections 3.

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.