CVE-2023-5173 Integer overflow in Firefox
An integer overflow in Firefox allows out-of-bounds writes to privileged memory, potentially enabling code execution when a non-standard preference is enabled.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2023-5173?
CVE-2023-5173 is a high-severity vulnerability in Mozilla Firefox, published on 27 Sep 2023. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
In a non-standard configuration of Firefox, an integer overflow could have occurred based on network traffic (possibly under influence of a local unprivileged webpage), leading to an out-of-bounds write to privileged process memory. *This bug only affects Firefox if a non-standard preference allowing non-HTTPS Alternate Services (`network.http.altsvc.oe`) is enabled.* This vulnerability affects Firefox < 118.
Weakness: CWE-190
Which versions are affected by CVE-2023-5173?
It affects 1 product.
Products include Mozilla Firefox.
How do I fix CVE-2023-5173?
Upgrade to a fixed version.
Is CVE-2023-5173 being exploited?
There is no known exploitation of CVE-2023-5173 in the wild and no public exploit code.
Other vulnerabilities in Mozilla Firefox
Sources
Also known as GHSA-7873-qcmm-76jc, UBUNTU-CVE-2023-5173.