CVE-2020-11017: Double free in cliprdr_server_receive_capabilities in FreeRDP
Noroxi assessment
Priority: Monitor (action score 26/100)
- The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
- Probability of exploitation in the next 30 days: 1.6% (FIRST EPSS); higher than 76.5% of all records.
- Anyone who can reach it over the internet can trigger it. A low-privileged account is enough. No user action is required. No special conditions are required; it is repeatable.
- Fixed version: FreeRDP FreeRDP 2.1.0.
- Mentioned 1 time in Turkish national cyber security advisories (siberguvenlik.gov.tr).
Low priority for now. Upgrade to FreeRDP FreeRDP 2.1.0 or later.
Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it
Primary sources: NVD · CVE.org · FIRST EPSS
In FreeRDP less than or equal to 2.0.0, by providing manipulated input a malicious client can create a double free condition and crash the server. This is fixed in version 2.1.0.
- Published
- May 29, 2020
- Updated
- Jun 16, 2026
- EPSS
- 1.6% · 76th percentile
- CWE
- CWE-415
Report tools
Action score
26
Monitor
Low priority for now.
- CVSS
- 26 / 40 · 6.5 / 10
- CISA KEV
- 0 / 30 · Not listed
- EPSS
- 0 / 30 · 1.6%
CNA vs NVD score
- NVD
- 6.5
- CNA · GitHub_M
- 6.5
- agree
The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.
Get told when this record changes
- Not in KEV: no record of exploitation in the wild
- No public exploit code on record
- A fix has been released
If any of these changes, we'll tell you in the daily email digest.
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Noroxi analysis
What does it mean in your environment?
The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.
We use this product, ask for helpAffected systems
Is your version affected?
Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.
| Vendor | Product | CPE |
|---|---|---|
| freerdp | freerdp | cpe:2.3:a:freerdp:freerdp |
| opensuse | leap | cpe:2.3:o:opensuse:leap |
| debian | debian linux | cpe:2.3:o:debian:debian_linux |
Affected versions
NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.
- debian debian linux10.0
- freerdp freerdpbefore 2.1.0
- opensuse leap15.1
Versions reported by the vendor
Affected version ranges reported by the assigning authority (GitHub_M). Independent of NVD's CPE analysis and usually ahead of it.
FreeRDP FreeRDP
- <= 2.0.0affected
Package-level exposure
OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.
| Ecosystem | Package | Affected range | Fix |
|---|---|---|---|
| Debian:10 | freerdp2 | before 2.3.0+dfsg1-2+deb10u3 | 2.3.0+dfsg1-2+deb10u3 |
| Debian:12 | freerdp2 | before 2.1.1+dfsg1-1 | 2.1.1+dfsg1-1 |
| openSUSE:Leap 15.1 | freerdp | before 2.1.2-lp151.5.6.1 | 2.1.2-lp151.5.6.1 |
| openSUSE:Tumbleweed | freerdp2 | before 2.4.0-2.1 | 2.4.0-2.1 |
| SUSE:Linux Enterprise Software Development Kit 12 SP5 | freerdp | before 2.1.2-12.20.1 | 2.1.2-12.20.1 |
| SUSE:Linux Enterprise Workstation Extension 12 SP5 | vinagre | before 3.20.2-16.3.3 | 3.20.2-16.3.3 |
| SUSE:Linux Enterprise Workstation Extension 15 SP1 | freerdp | before 2.1.2-10.15.1 | 2.1.2-10.15.1 |
| SUSE:Linux Enterprise Workstation Extension 15 SP2 | freerdp | before 2.1.2-15.7.1 | 2.1.2-15.7.1 |
Same product
freerdp: all recordsOther highest-scoring records for the same primary product.
- CVE-2018-8787FreeRDP prior to version 2.0.0-rc4 contains an Integer Overflow that leads to a Heap-Based Buffer Overflow in function gdi_Bitmap_Decompress42Plan
- CVE-2018-8788FreeRDP prior to version 2.0.0-rc4 contains an Out-Of-Bounds Write of up to 4 bytes in function nsc_rle_decode() that results in a memory co41Plan
- CVE-2018-8786FreeRDP prior to version 2.0.0-rc4 contains an Integer Truncation that leads to a Heap-Based Buffer Overflow in function update_read_bitmap_41Plan
Published before and after this one in the same product
- ← EarlierCVE-2020-13397May 22, 2020 · An issue was discovered in FreeRDP before 2.1.1.22Monitor
- ← EarlierCVE-2020-13398May 22, 2020 · An issue was discovered in FreeRDP before 2.1.1.34Monitor
- Later →CVE-2020-11018May 29, 2020 · Out of bound read in cliprdr_server_receive_capabilities in FreeRDP27Monitor
Remediation
Which version to upgrade to
Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.
| Product / package | Fixed version | Source |
|---|---|---|
| FreeRDP FreeRDP | 2.1.0 · description | Vendor (CNA) |
| debian:freerdp2 | 2.1.1+dfsg1-1 · Debian:12 | Package registry (OSV) |
| opensuse:freerdp | 2.1.2-lp151.5.6.1 · openSUSE:Leap 15.1 | Package registry (OSV) |
| opensuse:freerdp2 | 2.4.0-2.1 · openSUSE:Tumbleweed | Package registry (OSV) |
| suse:freerdp | 2.1.2-10.15.1 · SUSE:Linux Enterprise Workstation Extension 15 SP1 | Package registry (OSV) |
| suse:vinagre | 3.20.2-16.3.3 · SUSE:Linux Enterprise Workstation Extension 12 SP5 | Package registry (OSV) |
Exploit status
No known public exploit
No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.
Research context
For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.
Timeline
From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.
No dated events beyond publication.
No history yet (it accumulates with the daily EPSS job).
Patch and commit links
Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.
No commit or PR link among the references.
Credits
All researchersFinders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.
No credits in the CNA record.
Variant candidates
Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.
No nightly-computed relations.
Chain candidates
An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.
—
Bug bounty scope
No known public program.
Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).
National notice (Türkiye Cybersecurity Directorate / USOM)
Official security notices citing this record; remediation advice is on the agency's page.
- TR-20-397 · Jun 2, 2020(FreeRDP Zafiyeti)
Technical details
Attack conditions
- Anyone who can reach it over the internet can trigger it.
- A low-privileged account is enough.
- No user action is required.
- No special conditions are required; it is repeatable.
If successful
- Confidentiality
- none
- Integrity
- none
- Availability
- high · the service can be disrupted
- Attack vector
- Network
- Attack complexity
- Low
- Privileges required
- Low
- User interaction
- None
- Scope
- Unchanged
- Confidentiality impact
- None
- Integrity impact
- None
- Availability impact
- High
Weakness class (CWE)
CWE-415 · Double FreeCVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
nvd-primary
Attack context
MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.
MITRE has no CAPEC/ATT&CK mapping for this CWE.
Change log
- Fix✗ → ✓
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References
Show all references (2 more)Show less
Vendor advisories and official records. Exploit/PoC links are deliberately left out.