4.5Medium
Sfackler Openssl
CVE-2023-53159
The openssl crate before 0.10.55 for Rust allows an out-of-bounds read via an empty string to X509VerifyParamRef::set_host.
What this means for your business
- It affects Sfackler Openssl. It matters if your company, or a supplier that handles your data, runs it.
- Code showing how to exploit it has been published, but real attacks have not been confirmed.
- An attacker can use it only with access to the machine itself, without a login, and without anyone at your company clicking anything.
What to do
- 1Check whether your company or your suppliers run Sfackler Openssl, and which version. The affected versions are listed further down this page.
- 2If you do, apply the vendor's fix. A patch or vendor advisory has been published.
Not sure if your company is exposed?
Fastnexa’s certified penetration testers can check whether attackers could use this flaw, or others like it, against your websites, apps and network. The full test is free for our first 10 founding clients until 31 December 2026.
Scoring
- CVSS
- 4.5 (v3.1)
- Vector
CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:C/C:L/I:N/A:L- Weakness
- CWE-126
- Assigned by
- cve@mitre.org
Dates
- Published
- 2025-07-28
- Last modified
- 2026-09-17
- Sources
- NVD
Affected products
- Sfackler Openssl- 0.10.55
As listed in the NVD configuration data. Not a statement about your estate.