CVE-2023-25734 Server-side request forgery in Firefox
Attackers can trigger unexpected network requests and leak NTLM credentials via malicious .url shortcuts in Firefox on Windows.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2023-25734?
CVE-2023-25734 is a high-severity server-side request forgery vulnerability in Mozilla Firefox, published on 2 Jun 2023. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official description
After downloading a Windows <code>.url</code> shortcut from the local filesystem, an attacker could supply a remote path that would lead to unexpected network requests from the operating system. This also had the potential to leak NTLM credentials to the resource.<br>*This bug only affects Firefox on Windows. Other operating systems are unaffected.*. This vulnerability affects Firefox < 110, Thunderbird < 102.8, and Firefox ESR < 102.8.
Weakness: CWE-601
Which versions are affected by CVE-2023-25734?
It affects 3 products.
Products include Mozilla Firefox, Mozilla Firefox Esr, Mozilla Thunderbird.
How do I fix CVE-2023-25734?
Upgrade to a fixed version.
Upgrade, and send outbound requests through an allow-list that blocks internal addresses. More about Server-side request forgery.
Is CVE-2023-25734 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2023-25734 exists.
Other vulnerabilities in Mozilla Firefox
Sources
Also known as GHSA-wpvr-v2cc-f6qx.