Security readout for executives and security teams
Plain-English summary
This vulnerability affects FreeRDP clients before 2.0.0-rc4. A malicious or compromised RDP server could trigger a small out-of-bounds write in FreeRDP's NSC RLE decoder, causing memory corruption and possibly remote code execution. It is important for organizations that use FreeRDP-based remote desktop tooling.
Executive priority
Prioritize remediation where FreeRDP is used by administrators, help desk staff, or jump-host workflows. The business risk is client compromise from an RDP server, not only exposure of RDP servers. Patch through normal endpoint and Linux package channels.
Technical view
CVE-2018-8788 is a CWE-787 out-of-bounds write of up to 4 bytes in FreeRDP's nsc_rle_decode() before 2.0.0-rc4. The source bundle ties it to memory corruption and possible remote code execution, with vendor advisories from Debian, Ubuntu, and Red Hat and an upstream FreeRDP commit.
Likely exposure
Exposure is most likely on Linux workstations, jump boxes, thin clients, or automation tools using FreeRDP versions before 2.0.0-rc4 or affected distro packages. Risk depends on whether users or systems connect to untrusted, compromised, or attacker-controlled RDP servers.
Exploitation context
The provided sources describe possible remote code execution and Check Point's reverse RDP research context. The source bundle does not show CISA KEV listing or confirmed active exploitation in the wild, so active exploitation should not be claimed from this evidence.
Researcher notes
No CVSS vector is present in the provided bundle. The affected function is nsc_rle_decode(), and the upstream fix is referenced by commit d1112c279bd1a327e8e4d0b5f371458bf2579659. Treat exploitability details as incomplete unless validated against vendor research and patched source.
Mitigation direction
- Upgrade FreeRDP to 2.0.0-rc4 or later where directly managed.
- Apply fixed FreeRDP packages from Debian, Ubuntu, Red Hat, or your distribution vendor.
- Inventory applications or appliances that embed or bundle FreeRDP.
- Limit FreeRDP use to trusted RDP servers until patched.
- Review vendor advisories for package-specific fixed versions and backports.
Validation and detection
- Confirm installed FreeRDP package versions across endpoints and servers.
- Check distribution advisory status for Debian, Ubuntu, and Red Hat managed assets.
- Identify remote desktop tools that depend on FreeRDP libraries.
- Verify patched packages are installed after remediation.
- Review logs or usage records for connections to untrusted RDP servers.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-787: Exact CWE lookup
Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupExecution behavior lookup
The CVE wording references code or command execution, so execution technique review may help defensive triage. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2018-8788 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Unknown
- CVSS
- Not scored
- Known Exploited
- No
- Published
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS and timeline data
No CVSS vectors or timeline events were available in the normalized CVE source material.
Source materials
- CVE List V5 sourceCVE List V5
- [debian-lts-announce] 20190209 [SECURITY] [DLA 1666-1] freerdp security updateCVE reference · mailing-list, x_refsource_MLIST
- USN-3845-1CVE reference · vendor-advisory, x_refsource_UBUNTU
- https://research.checkpoint.com/reverse-rdp-attack-code-execution-on-rdp-clients/CVE reference · x_refsource_CONFIRM
- https://github.com/FreeRDP/FreeRDP/commit/d1112c279bd1a327e8e4d0b5f371458bf2579659CVE reference · x_refsource_CONFIRM
- RHSA-2019:0697CVE reference · vendor-advisory, x_refsource_REDHAT
- USN-3845-2CVE reference · vendor-advisory, x_refsource_UBUNTU
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Out-of-bounds Write
Out-of-bounds Write represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.