Type Confusion in firefox-esr (Alpine package)



Risk Critical
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2019-17026
CWE-ID CWE-843
Exploitation vector Network
Public exploit This vulnerability is being exploited in the wild.
Vulnerable software
 firefox-esr (Alpine package)
Operating systems & Components / Operating system package or component

Vendor Alpine Linux Development Team

Security Bulletin

This security bulletin contains one critical risk vulnerability.

1) Type Confusion

EUVDB-ID: #VU24147

Risk: Critical

CVSSv4.0: 8.6 [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:A/U:Red]

CVE-ID: CVE-2019-17026

CWE-ID: CWE-843 - Type confusion

Exploit availability: Yes

Description

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

The vulnerability exists due to a type confusion error with StoreElementHole and FallibleStoreElement when processing HTML content in IonMonkey JIT compiler. A remote attacker can create a specially crafted webpage, trick the victim into visiting it, trigger a type confusion error and execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Note, this vulnerability is being actively exploited in the wild.

Mitigation

Install update from vendor's website.

Vulnerable software versions

firefox-esr (Alpine package): 60.4.0-r0 - 68.3.0-r0

CPE2.3 External links

https://git.alpinelinux.org/aports/commit/?id=af0d1d1edd77beb85efb9bbf0ad15000eb319170
https://git.alpinelinux.org/aports/commit/?id=6b5e4482828c460437f6c79a23c688d6d99a14fd
https://git.alpinelinux.org/aports/commit/?id=ed2c5b48f57ac3a3a379f6a0db7ef891fcdbaeeb


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?

Yes. This vulnerability is being exploited in the wild.



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