#VU71229 Incorrect Regular Expression in Mozilla Firefox and Firefox for Android - CVE-2023-23603

Vulnerability identifier: #VU71229

Vulnerability risk: Low

CVSSv4.0: 0.5 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2023-23603

CWE-ID: CWE-185

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Mozilla Firefox
Client/Desktop applications / Web browsers
Firefox for Android
Mobile applications / Apps for mobile phones

Vendor: Mozilla

Description

The vulnerability allows a remote attacker to bypass implemented security restrictions.

The vulnerability exists due to usage of an incorrect regular expression when filtering out forbidden properties and values from style directives in calls to console.log. A remote attacker can exfiltrate data from the victim's browser.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Mozilla Firefox: 100.0.1 - 108.0.2

Firefox for Android: 100.1.0 - 108.2.0

---

External links
http://www.mozilla.org/en-US/security/advisories/mfsa2023-01/

---

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.