Heap-based buffer overflow in freetype (Alpine package)

1) Heap-based buffer overflow

EUVDB-ID: #VU11094

Risk: High

CVSSv3.1: 8.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2017-8105

CWE-ID: CWE-122 - Heap-based Buffer Overflow

Exploit availability: No

Description

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The weakness exists in the t1_decoder_parse_charstrings function due to heap-based buffer overflow. A remote attacker can trigger out-of-bounds write and execute arbitrary code.

Mitigation

Install update from vendor's website.

Vulnerable software versions

freetype (Alpine package): 2.5.5-r0

External links

http://git.alpinelinux.org/aports/commit/?id=686283c246936ebea184fd5c9b82d35b373bc6a8
http://git.alpinelinux.org/aports/commit/?id=7a7493c33286ca7e43c8171cd6fad02bd13574c8
http://git.alpinelinux.org/aports/commit/?id=89c7aef675e52f6296314b9c79c495732c7b5809
http://git.alpinelinux.org/aports/commit/?id=b214882eb550b57e1a6f1c44dfdd338ad11850f9
http://git.alpinelinux.org/aports/commit/?id=c5817a33b6ca1ed535e773a879e359fb32c39aa1
http://git.alpinelinux.org/aports/commit/?id=e4bb22b94325a5d26f07a717475760c410e49f25
http://git.alpinelinux.org/aports/commit/?id=5c9c87da94bc8d71f77e53686827b3935ac9ae50
http://git.alpinelinux.org/aports/commit/?id=1050b6acec33be8e4a2e6838971c4861b62bbf9d

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.