Gentoo update for HarfBuzz

Published: 2022-09-26

Risk	High
Patch available	YES
Number of vulnerabilities	2
CVE-ID	CVE-2021-45931 CVE-2022-33068
CWE-ID	CWE-787 CWE-190
Exploitation vector	Network
Public exploit	N/A
Vulnerable software Subscribe	Gentoo Linux Operating systems & Components / Operating system media-libs/harfbuzz Operating systems & Components / Operating system package or component
Vendor	Gentoo

Security Bulletin

This security bulletin contains information about 2 vulnerabilities.

1) Out-of-bounds write

EUVDB-ID: #VU67642

Risk: High

CVSSv3.1: 7.7 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-45931

CWE-ID: CWE-787 - Out-of-bounds write

Exploit availability: No

Description

The vulnerability allows a remote attacker to compromise vulnerable system.

The vulnerability exists due to a boundary error when processing untrusted input within the hb_bit_set_invertible_t::set() function. A remote attacker can create a specially crafted file, trick the victim into opening it, trigger an out-of-bounds write and execute arbitrary code on the target system.

Mitigation

Update the affected packages.
media-libs/harfbuzz to version: 4.4.0

Vulnerable software versions

Gentoo Linux: All versions

media-libs/harfbuzz: before 4.4.0

External links

http://security.gentoo.org/glsa/202209-11

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.

2) Integer overflow

EUVDB-ID: #VU65442

Risk: Medium

CVSSv3.1: 6.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2022-33068

CWE-ID: CWE-190 - Integer overflow