Denial of service in HarfBuzz

1) Out-of-bounds read

EUVDB-ID: #VU69668

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-2015-9274

CWE-ID: CWE-125 - Out-of-bounds read

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to a boundary condition when handling GPOS and GSUB table in hb-ot-layout-gpos-table.hh, hb-ot-layout-gsub-table.hh, and hb-ot-layout-gsubgpos-private.hh files. A remote attacker can pass specially crafted data to the application, trigger an out-of-bounds read error and perform a denial of service attack.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

HarfBuzz: 1.0.0 - 1.0.3

CPE2.3

• cpe:2.3:a:freedesktop_org:harfbuzz:1.0.0:*:*:*:*:*:*:*
• cpe:2.3:a:freedesktop_org:harfbuzz:1.0.1:*:*:*:*:*:*:*
• cpe:2.3:a:freedesktop_org:harfbuzz:1.0.2:*:*:*:*:*:*:*

External links

http://github.com/harfbuzz/harfbuzz/commit/c917965b9e6fe2b21ed6c51559673288fa3af4b7

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.