Heap-based buffer overflow in firefox-esr (Alpine package)

1) Heap-based buffer overflow

EUVDB-ID: #VU13074

Risk: High

CVSSv3.1: 8.3 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2018-6126

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 due to heap-based buffer overflow in Skia when handling malicious input. A remote attacker can trick the victim into visiting a specially crafted website, trigger memory corruption and execute arbitrary code with privileges of the current user.

Successful exploitation of the vulnerability may result in system compromise.

Mitigation

Install update from vendor's website.

Vulnerable software versions

firefox-esr (Alpine package): 52.8.0-r0 - 52.8.0-r2

External links

http://git.alpinelinux.org/aports/commit/?id=716ebb36f3df347447bc5309889df44a337b7428
http://git.alpinelinux.org/aports/commit/?id=87a58154ba71f8435bad6a2f7fe626defeca29ce
http://git.alpinelinux.org/aports/commit/?id=c8648770e08a1351777b3727553420e582622fb4

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.