CVE-2023-29539 Other in Firefox
Attackers can exploit NULL character truncation in Content-Disposition headers to trick users into downloading and executing malicious files.
- 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-2023-29539?
CVE-2023-29539 is a high-severity 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
When handling the filename directive in the Content-Disposition header, the filename would be truncated if the filename contained a NULL character. This could have led to reflected file download attacks potentially tricking users to install malware. This vulnerability affects Firefox < 112, Focus for Android < 112, Firefox ESR < 102.10, Firefox for Android < 112, and Thunderbird < 102.10.
Weakness: CWE-476
Which versions are affected by CVE-2023-29539?
It affects 5 products.
Products include Mozilla Firefox, Mozilla Firefox Esr, Mozilla Firefox Mobile, Mozilla Focus, Mozilla Thunderbird.
How do I fix CVE-2023-29539?
Upgrade to a fixed version.
Is CVE-2023-29539 being exploited?
There is no known exploitation of CVE-2023-29539 in the wild and no public exploit code.
Other vulnerabilities in Mozilla Firefox
Sources
Also known as DEBIAN-CVE-2023-29539, GHSA-cw5w-6pfm-w752, UBUNTU-CVE-2023-29539.