CVE-2023-38253 W3m: out of bounds read in growbuf_to_str() at w3m/indep.c
An out-of-bounds read in w3m allows attackers to cause a denial of service via a crafted HTML file.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2023-38253?
CVE-2023-38253 is a medium-severity denial of service vulnerability in Fedoraproject Extra Packages for Enterprise Linux, published on 14 Jul 2023. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
Official description
An out-of-bounds read flaw was found in w3m, in the growbuf_to_Str function in indep.c. This issue may allow an attacker to cause a denial of service through a crafted HTML file.
Weakness: CWE-125
Which versions are affected by CVE-2023-38253?
It affects 4 products.
Products include Fedoraproject Extra Packages for Enterprise Linux, Fedoraproject Fedora, Redhat Enterprise Linux, Tats W3m.
How do I fix CVE-2023-38253?
Apply the vendor's patch.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2023-38253 being exploited?
There is no known exploitation of CVE-2023-38253 in the wild and no public exploit code.
Other vulnerabilities in Fedoraproject Extra Packages for Enterprise Linux
- CVE-2023-34152 Command injection in ImageMagick
- CVE-2022-4170 Code injection in rxvt-unicode
- CVE-2022-40315 Moodle Minor SQL injection risk in admin user browsing
- CVE-2022-45152 Moodle blind Server-Side Request Forgery (SSRF) vulnerability in LTI provider library
- CVE-2022-24882 Server side NTLM does not properly check parameters in FreeRDP
All Fedoraproject Extra Packages for Enterprise Linux vulnerabilities
Sources
Also known as ALPINE-CVE-2023-38253, DEBIAN-CVE-2023-38253, GHSA-rrg6-f895-jq87, UBUNTU-CVE-2023-38253.