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

1) Use-after-free

EUVDB-ID: #VU49300

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-2020-16044

CWE-ID: CWE-416 - Use After Free

Exploit availability: No

Description

The vulnerability allows a remote attacker to compromise vulnerable system.

The vulnerability exists due to a use-after-free error when processing COOKIE-ECHO chunk in a SCTP packet. A remote attacker can pass specially crafted data to the browser, trigger a use-after-free error and execute arbitrary code on the system.

Successful exploitation of the vulnerability may allow an attacker to compromise vulnerable system.

Mitigation

Install update from vendor's website.

Vulnerable software versions

firefox-esr (Alpine package): 60.4.0-r0 - 78.6.0-r0

CPE2.3

• cpe:2.3:a:alpine:firefox-esr_alpine_package:60.4.0-r0:*:*:*:*:alpine_linux:*:3.8
• cpe:2.3:a:alpine:firefox-esr_alpine_package:60.4.0-r1:*:*:*:*:alpine_linux:*:3.8
• cpe:2.3:a:alpine:firefox-esr_alpine_package:60.5.0-r0:*:*:*:*:alpine_linux:*:3.9

External links

https://git.alpinelinux.org/aports/commit/?id=5150661a1536c3466a33e7450b8c9a318c83f007
https://git.alpinelinux.org/aports/commit/?id=ffbf81246aa536fcbdce789f0e5c00c4b13a4505

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.