freerdp: Heap-based buffer overflow in zgfx_decompress_segment() function
Published Nov 29, 2018
9.8
CRITICALCVSS 3.1
EPSS 7.29%
Description
FreeRDP prior to version 2.0.0-rc4 contains a Heap-Based Buffer Overflow in function zgfx_decompress_segment() that results in a memory corruption and probably even a remote code execution.
Affected products
-
- Version All versions prior to 2.0.0-rc4StatusaffectedConstraints-
- Version
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | ||||||
|---|---|---|---|---|---|---|---|---|---|
| Check Point Software Technologies Ltd. | FreeRDP | n/a |
|
No data.
Red Hat Enterprise Linux 6
freerdp
Not affected
Red Hat Enterprise Linux 7
freerdp
Not affected
Red Hat Enterprise Linux 8
freerdp
Not affected
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 6 | freerdp | Not affected | n/a |
| Red Hat Enterprise Linux 7 | freerdp | Not affected | n/a |
| Red Hat Enterprise Linux 8 | freerdp | Not affected | n/a |
No package ranges for this CVE.
Remediation
Red Hat statement
This issue did not affect the versions of freerdp as shipped with Red Hat Enterprise Linux 6 and 7 as they did not include support for ZGFX data compression.
Metrics
No CVSS v4.0 score for this CVE.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
AV:N/AC:L/Au:N/C:P/I:P/A:P
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
Score over time
2021–2026- EPSS v1
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v1
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (24 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 7.29% (0.07293) | 94.18th | v5 (v2026.06.15) |
| Jun 15, 2026 | 7.29% (0.07293) | 93.55th | v5 (v2026.06.15) |
| Nov 21, 2025 | 13.00% (0.13000) | 93.80th | v4 (v2025.03.14) |
| Nov 18, 2025 | 26.30% (0.26295) | 95.99th | v4 (v2025.03.14) |
| Oct 30, 2025 | 13.00% (0.13000) | 93.76th | v4 (v2025.03.14) |
| May 25, 2025 | 14.66% (0.14661) | 94.11th | v4 (v2025.03.14) |
| Mar 30, 2025 | 20.58% (0.20576) | 95.09th | v4 (v2025.03.14) |
| Mar 29, 2025 | 29.95% (0.29950) | 94.71th | v4 (v2025.03.14) |
| Mar 17, 2025 | 20.58% (0.20576) | 95.11th | v4 (v2025.03.14) |
| Dec 17, 2024 | 3.57% (0.03574) | 91.48th | v3 (v2023.03.01) |
| Dec 12, 2024 | 11.48% (0.11481) | 95.49th | v3 (v2023.03.01) |
| Oct 8, 2024 | 10.65% (0.10652) | 95.18th | v3 (v2023.03.01) |
| Sep 17, 2024 | 14.00% (0.13996) | 95.76th | v3 (v2023.03.01) |
| Aug 31, 2024 | 10.65% (0.10652) | 95.15th | v3 (v2023.03.01) |
| Mar 14, 2024 | 14.64% (0.14642) | 95.61th | v3 (v2023.03.01) |
| Nov 23, 2023 | 15.39% (0.15387) | 95.34th | v3 (v2023.03.01) |
| Mar 7, 2023 | 16.47% (0.16467) | 95.11th | v3 (v2023.03.01) |
| Mar 6, 2023 | 5.63% (0.05634) | 90.24th | v2 (v2022.01.01) |
| Apr 1, 2022 | 5.63% (0.05634) | 89.29th | v2 (v2022.01.01) |
| Feb 4, 2022 | 5.63% (0.05634) | 76.84th | v2 (v2022.01.01) |
| Feb 3, 2022 | 1.87% (0.01867) | 48.06th | v1 |
| Jan 6, 2022 | 1.87% (0.01867) | 47.55th | v1 |
| Sep 1, 2021 | 1.87% (0.01867) | 76.14th | v1 |
| Apr 14, 2021 | 1.87% (0.01867) | 0.00th | v1 |
References (8)
- http://www.securityfocus.com/bid/106938 vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry
- https://access.redhat.com/security/cve/CVE-2018-8784 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1671356 Issue Tracking
- https://github.com/FreeRDP/FreeRDP/commit/17c363a5162fd4dc77b1df54e48d7bd9bf6b3be7 x_refsource_CONFIRMPatchVendor Advisory
- https://nvd.nist.gov/vuln/detail/CVE-2018-8784
- https://research.checkpoint.com/reverse-rdp-attack-code-execution-on-rdp-clients/ x_refsource_CONFIRMExploitThird Party Advisory
- https://usn.ubuntu.com/3845-1/ vendor-advisoryx_refsource_UBUNTUThird Party Advisory
- https://www.cve.org/CVERecord?id=CVE-2018-8784
| Link | Providers | Tags |
|---|---|---|
| http://www.securityfocus.com/bid/106938 | vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry | |
| https://access.redhat.com/security/cve/CVE-2018-8784 | Vendor Advisory | |
| https://bugzilla.redhat.com/show_bug.cgi?id=1671356 | Issue Tracking | |
| https://github.com/FreeRDP/FreeRDP/commit/17c363a5162fd4dc77b1df54e48d7bd9bf6b3be7 | x_refsource_CONFIRMPatchVendor Advisory | |
| https://nvd.nist.gov/vuln/detail/CVE-2018-8784 | ||
| https://research.checkpoint.com/reverse-rdp-attack-code-execution-on-rdp-clients/ | x_refsource_CONFIRMExploitThird Party Advisory | |
| https://usn.ubuntu.com/3845-1/ | vendor-advisoryx_refsource_UBUNTUThird Party Advisory | |
| https://www.cve.org/CVERecord?id=CVE-2018-8784 |
Change history (0)
No recorded changes yet.