CVE-2023-27916 — The affected application lacks proper validation of user-supplied data when pars

The affected application lacks proper validation of user-supplied data when parsing font files (e.g., FNT). This could lead to an out-of-bounds read. An attacker could leverage this vulnerability to potentially execute arbitrary code in the context of the current process.

01What is this vulnerability?

The affected application lacks proper validation of user-supplied data when parsing font files (e.g., FNT). This could lead to an out-of-bounds read. An attacker could leverage this vulnerability to potentially execute arbitrary code in the context of the current process.

02Affected products

Vendor	Product	Versions
Horner Automation	Cscape	v9.90 SP8
Horner Automation	Cscape EnvisionRV	v4.70

03Active exploitation status

Not currently listed on the CISA Known Exploited Vulnerabilities (KEV) catalog. EPSS is the best forward-looking signal — see the EPSS row above.

04Recommended remediation

• Patch to a fixed version listed in the vendor advisory (see references below).
• Mitigate with WAF rules, network egress filters, or feature flags where the patch is not yet available.
• Hunt historical logs for exploitation indicators — see Detection signatures below.

05Technical details

For the full vendor write-up, exploit chains, and reference implementations, see the references list in section 09.

06Detection signatures

Ask SARA in chat to draft a starting detection for this CVE in your stack of choice.

07Related CVEs

No directly-cited follow-up CVEs in the KB record for this advisory. The references list in section 09 carries the vendor cross-references.

08Timeline

• Published: 2023-06-06T16:39:46.317Z
• Last modified: 2025-01-07T18:34:58.614Z

09References

• www.cisa.gov — https://www.cisa.gov/news-events/ics-advisories/icsa-23-143-04