libvncserver: Improper input sanitization in rfbProcessClientNormalMessage in rfbserver.c
Published Feb 19, 2018
9.8
CRITICALCVSS 3.0
EPSS 6.11%
Description
An issue was discovered in LibVNCServer through 0.9.11. rfbProcessClientNormalMessage() in rfbserver.c does not sanitize msg.cct.length, leading to access to uninitialized and potentially sensitive data or possibly unspecified other impact (e.g., an integer overflow) via specially crafted VNC packets.
Affected products
No data.
Configuration 1
- ≤ 0.9.11
Configuration 2
- 7.0
- 8.0
- 9.0
Configuration 3
- 14.04
- 16.04
- 17.10
Configuration 4
- 7.0
- 7.0
- 7.6
- 7.5
- 7.6
- 7.6
- 7.0
No data.
Red Hat Enterprise Linux 7
libvncserver-0:0.9.9-12.el7_5
Fixed · RHSA-2018:1055
Red Hat Enterprise Linux 6
libvncserver
Will not fix
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 7 | libvncserver-0:0.9.9-12.el7_5 | Fixed | RHSA-2018:1055 |
| Red Hat Enterprise Linux 6 | libvncserver | Will not fix | n/a |
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
No CVSS v3.1 score for this CVE.
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
1 other source (Red Hat) ▾
CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:L
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 (21 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 6.11% (0.06106) | 93.21th | v5 (v2026.06.15) |
| Aug 23, 2026 | 5.29% (0.05295) | 92.01th | v5 (v2026.06.15) |
| Jun 15, 2026 | 6.45% (0.06449) | 92.83th | v5 (v2026.06.15) |
| Dec 8, 2025 | 3.79% (0.03792) | 87.66th | v4 (v2025.03.14) |
| Nov 21, 2025 | 5.87% (0.05874) | 90.17th | v4 (v2025.03.14) |
| Nov 18, 2025 | 7.60% (0.07601) | 90.94th | v4 (v2025.03.14) |
| Nov 17, 2025 | 5.87% (0.05874) | 90.16th | v4 (v2025.03.14) |
| Mar 30, 2025 | 3.75% (0.03750) | 86.94th | v4 (v2025.03.14) |
| Mar 29, 2025 | 7.03% (0.07027) | 85.47th | v4 (v2025.03.14) |
| Mar 17, 2025 | 4.24% (0.04244) | 88.04th | v4 (v2025.03.14) |
| Dec 12, 2024 | 1.26% (0.01261) | 86.20th | v3 (v2023.03.01) |
| Jul 17, 2024 | 1.26% (0.01261) | 85.76th | v3 (v2023.03.01) |
| Jul 13, 2023 | 1.26% (0.01261) | 83.76th | v3 (v2023.03.01) |
| Mar 7, 2023 | 1.25% (0.01249) | 83.39th | v3 (v2023.03.01) |
| Mar 6, 2023 | 2.69% (0.02686) | 82.85th | v2 (v2022.01.01) |
| Apr 1, 2022 | 2.69% (0.02686) | 81.17th | v2 (v2022.01.01) |
| Feb 4, 2022 | 2.69% (0.02686) | 62.66th | v2 (v2022.01.01) |
| Feb 3, 2022 | 3.08% (0.03080) | 65.20th | v1 |
| Jan 6, 2022 | 3.08% (0.03080) | 64.86th | v1 |
| Sep 1, 2021 | 3.08% (0.03080) | 81.27th | v1 |
| Apr 14, 2021 | 3.08% (0.03080) | 0.00th | v1 |
References (18)
- http://www.openwall.com/lists/oss-security/2018/02/18/1 x_refsource_MISCExploitMailing ListThird Party Advisory
- http://www.securityfocus.com/bid/103107 vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry
- https://access.redhat.com/errata/RHSA-2018:1055 vendor-advisoryx_refsource_REDHATThird Party Advisory
- https://access.redhat.com/security/cve/CVE-2018-7225 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1546858 Issue Tracking
- https://github.com/LibVNC/libvncserver/issues/218 x_refsource_MISCThird Party Advisory
- https://lists.debian.org/debian-lts-announce/2018/03/msg00035.html mailing-listx_refsource_MLISTMailing ListThird Party Advisory
- https://lists.debian.org/debian-lts-announce/2019/10/msg00042.html mailing-listx_refsource_MLIST
- https://lists.debian.org/debian-lts-announce/2019/11/msg00032.html mailing-listx_refsource_MLIST
- https://lists.debian.org/debian-lts-announce/2019/12/msg00028.html mailing-listx_refsource_MLIST
- https://nvd.nist.gov/vuln/detail/CVE-2018-7225
- https://security.gentoo.org/glsa/201908-05 vendor-advisoryx_refsource_GENTOO
- https://usn.ubuntu.com/3618-1/ vendor-advisoryx_refsource_UBUNTUThird Party Advisory
- https://usn.ubuntu.com/4547-1/ vendor-advisoryx_refsource_UBUNTU
- https://usn.ubuntu.com/4573-1/ vendor-advisoryx_refsource_UBUNTU
- https://usn.ubuntu.com/4587-1/ vendor-advisoryx_refsource_UBUNTU
- https://www.cve.org/CVERecord?id=CVE-2018-7225
- https://www.debian.org/security/2018/dsa-4221 vendor-advisoryx_refsource_DEBIANThird Party Advisory
Change history (0)
No recorded changes yet.