Spectre side-channel attack in Mozilla Firefox
| Risk | Medium |
| Patch available | YES |
| Number of vulnerabilities | 1 |
| CVE-ID | N/A |
| CWE-ID | CWE-385 |
| Exploitation vector | Network |
| Public exploit | Public exploit code for vulnerability #1 is available. |
| Vulnerable software Subscribe |
Mozilla Firefox Client/Desktop applications / Web browsers Firefox ESR Client/Desktop applications / Web browsers |
| Vendor | Mozilla |
Security Bulletin
This security bulletin contains one medium risk vulnerability.
1) Spectre side-channel attack
EUVDB-ID: #VU9870
Risk: Medium
CVSSv3.1: 4.2 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:N/A:N/E:P/RL:O/RC:C]
CVE-ID: N/A
CWE-ID:
CWE-385 - Covert Timing Channel
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to gain access to potentially sensitive information.
The vulnerability exists due to an error in Intel processor microcode, which can lead to timing side-channel attack and data extraction from modern CPUs.
The vulnerability is dubbed "Spectre". The PoC-code was created in JavaScript, which demonstrated possibility of the attack.
Update to version 57.0.4.
Vulnerable software versionsMozilla Firefox: 40.0 - 57.0.3
Firefox ESR: 45.0 - 45.8
External linkshttp://www.mozilla.org/en-US/security/advisories/mfsa2018-01/
Q & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.
How the attacker can exploit this vulnerability?
The attacker would have to trick the victim to visit a specially crafted website.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability. However, proof of concept for this vulnerability is available.
