CVE-2020-11096 — In FreeRDP before version 2

In FreeRDP before version 2.1.2, there is a global OOB read in update_read_cache_bitmap_v3_order. As a workaround, one can disable bitmap cache with -bitmap-cache (default). This is fixed in version 2.1.2.

01What is this vulnerability?

In FreeRDP before version 2.1.2, there is a global OOB read in update_read_cache_bitmap_v3_order. As a workaround, one can disable bitmap cache with -bitmap-cache (default). This is fixed in version 2.1.2.

02Affected products

Vendor	Product	Versions
FreeRDP	FreeRDP	< 2.1.2

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: 2020-06-22T00:00:00.000Z
• Last modified: 2024-08-04T11:21:14.608Z

09References

• www.freerdp.com — http://www.freerdp.com/2020/06/22/2_1_2-released
• github.com — https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-mjw7-3mq2-996x
• github.com — https://github.com/FreeRDP/FreeRDP/commit/b8beb55913471952f92770c90c372139d78c16…
• lists.opensuse.org — http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00080.html
• lists.fedoraproject.org — https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro…
• lists.fedoraproject.org — https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro…
• usn.ubuntu.com — https://usn.ubuntu.com/4481-1/
• lists.debian.org — https://lists.debian.org/debian-lts-announce/2023/10/msg00008.html