Arch Linux Security Advisory ASA-202010-11

Severity: High
Date : 2020-10-20
CVE-ID : CVE-2020-15999
Package : lib32-freetype2
Type : arbitrary code execution
Remote : Yes
Link : https://security.archlinux.org/AVG-1255

Summary

The package lib32-freetype2 before version 2.10.4-1 is vulnerable to
arbitrary code execution.

Resolution

Upgrade to 2.10.4-1.

pacman -Syu “lib32-freetype2>=2.10.4-1”

The problem has been fixed upstream in version 2.10.4.

Workaround

None.

Description

A heap buffer overflow has been found in freetype2 before 2.10.4.
Malformed TTF files with PNG sbit glyphs can cause a heap buffer
overflow in Load_SBit_Png as libpng uses the original 32-bit values,
which are saved in png_struct. If the original width and/or height are
greater than 65535, the allocated buffer won’t be able to fit the
bitmap.

Impact

A remote user can serve malformed TTF files that can cause arbitrary
code execution on the affected host.

References

http://git.savannah.nongnu.org/cgit/freetype/freetype2.git/commit/?id=a3bab162b2ae616074c8877a04556932998aeacd
https://savannah.nongnu.org/bugs/?59308
https://security.archlinux.org/CVE-2020-15999