CVE-2020-11523 — libfreerdp/gdi/region

libfreerdp/gdi/region.c in FreeRDP versions > 1.0 through 2.0.0-rc4 has an Integer Overflow.

01What is this vulnerability?

libfreerdp/gdi/region.c in FreeRDP versions > 1.0 through 2.0.0-rc4 has an Integer Overflow.

02Affected products

Vendor	Product	Versions
n	a / n/a	n/a

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: 2020-05-15T16:12:56.000Z
• Last modified: 2024-08-04T11:35:12.831Z

09References

• github.com — https://github.com/FreeRDP/FreeRDP/commits/master
• github.com — https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-4qrh-8cp8-4x42
• pub.freerdp.com — https://pub.freerdp.com/cve/CVE-2020-11523/pocAnalysis_2.pdf
• usn.ubuntu.com — https://usn.ubuntu.com/4379-1/
• usn.ubuntu.com — https://usn.ubuntu.com/4382-1/
• lists.opensuse.org — http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00080.html
• lists.debian.org — https://lists.debian.org/debian-lts-announce/2020/08/msg00054.html