Use-after-free error in firefox-esr (Alpine package)

1) Use-after-free error

EUVDB-ID: #VU10183

Risk: High

CVSSv4.0: 6.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber]

CVE-ID: CVE-2018-5096

CWE-ID: CWE-416 - Use After Free

Exploit availability: No

Description

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

The weakness exists due to use-after-free error during WebRTC connections while editing events in form elements on a page. 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): 52.5.2-r0 - 52.5.3-r0

CPE2.3

• cpe:2.3:o:alpine:firefox-esr_alpine_package:52.5.2-r0:*:*:*:*:alpine_linux:*:3.7
• cpe:2.3:o:alpine:firefox-esr_alpine_package:52.5.3-r0:*:*:*:*:alpine_linux:*:3.6

External links

https://git.alpinelinux.org/aports/commit/?id=f21cbd7eaa510ec218e63fc43323ca9b101bdad6
https://git.alpinelinux.org/aports/commit/?id=26701b74f891400a545844d0ba4f616001b15944

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.