MGASA-2021-0115 Updated pngcheck packages fix security vulnerabilities

This update fixes a buffer-overrun bug related to the MNG LOOP chunk which gets noticed even in PNG files if the -s option is used. RHBZ1908559. It also fixes a buffer overrun for certain invalid MNG PPLT chunk contents. RHBZ1907428...

Updated pngcheck packages fix a security vulnerability

This update fixes a potential global buffer overflow in the checkchunkname function via a crafted png file...

MGASA-2020-0444 Updated pngcheck packages fix a security vulnerability

This update fixes a potential global buffer overflow in the checkchunkname function via a crafted png file...