RCE in Microsoft Windows
CVE-2020-12393
The 'Copy as cURL' feature of Devtools' network tab did not properly escape the HTTP method of a request, which can be controlled by the website. If a user used the 'Copy as cURL' feature and pasted the command into a terminal, it could have resulted in command injection and arbitrary command execution. *Note: this issue only affects Firefox on Windows operating systems.*. This vulnerability affects Firefox ESR < 68.8, Firefox < 76, and Thunderbird < 68.8.0.
Vulnerability class: Command Injection (OS Command Injection)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.010 (61.9th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 62nd percentile — 61.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.010 · newest: 0.010 · change: 0.000
Affected products
- Microsoft Windows
- Mozilla Firefox — versions unspecified
- Mozilla Firefox Esr — versions unspecified
- Mozilla Firefox Esr
- Mozilla Thunderbird — versions unspecified
Weakness classification (CWE)
References
- www.mozilla.org/security/advisories/mfsa2020-18/ (Vendor Advisory)
- www.mozilla.org/security/advisories/mfsa2020-16/ (Vendor Advisory)
- www.mozilla.org/security/advisories/mfsa2020-17/ (Vendor Advisory)
- bugzilla.mozilla.org/show_bug.cgi (Permissions Required)
Frequently asked questions
- What is CVE-2020-12393?
- CVE-2020-12393 is a high-severity vulnerability in Microsoft Windows, classified under OS Command Injection. CVSS score: 7.8/10. Published 2020-05-26.
- How severe is CVE-2020-12393?
- High severity. CVSS v3 base score is 7.8 out of 10.