libvncserver: Heap out-of-bounds write in rfbserver.c in rfbProcessFileTransferReadBuffer() allows for potential code execution
Published Dec 19, 2018
9.8
CRITICALCVSS 3.0
EPSS 15.09%
Description
LibVNC before commit 502821828ed00b4a2c4bef90683d0fd88ce495de contains heap out-of-bound write vulnerability in server code of file transfer extension that can result remote code execution
Affected products
- Vendor n/a Product LibVNC Defaultn/a
- Version commit 502821828ed00b4a2c4bef90683d0fd88ce495deStatusaffectedConstraints-
- 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 | ||||||
|---|---|---|---|---|---|---|---|---|---|
| n/a | LibVNC | n/a |
|
Configuration 1
- < 0.9.12
Configuration 2
- 14.04
- 16.04
- 18.04
- 18.10
Configuration 3
- 7.0
- 7.0
- 7.6
- 7.6
- 7.6
- 7.0
Configuration 4
- 8.0
- 9.0
No data.
Red Hat Enterprise Linux 7
libvncserver-0:0.9.9-13.el7_6
Fixed · RHSA-2019:0059
Red Hat Enterprise Linux 6
libvncserver
Will not fix
Red Hat Enterprise Linux 8
libvncserver
Not affected
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 7 | libvncserver-0:0.9.9-13.el7_6 | Fixed | RHSA-2019:0059 |
| Red Hat Enterprise Linux 6 | libvncserver | Will not fix | n/a |
| Red Hat Enterprise Linux 8 | libvncserver | Not affected | 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:H/PR:L/UI:N/S:U/C:H/I:H/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 3, 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 (22 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 3, 2026 | 15.09% (0.15089) | 96.64th | v5 (v2026.06.15) |
| Jun 15, 2026 | 15.09% (0.15089) | 96.30th | v5 (v2026.06.15) |
| Mar 30, 2025 | 15.61% (0.15610) | 94.12th | v4 (v2025.03.14) |
| Mar 29, 2025 | 21.14% (0.21137) | 92.92th | v4 (v2025.03.14) |
| Mar 17, 2025 | 15.61% (0.15610) | 94.19th | v4 (v2025.03.14) |
| Feb 13, 2025 | 53.13% (0.53128) | 97.79th | v3 (v2023.03.01) |
| Nov 28, 2024 | 54.38% (0.54378) | 97.74th | v3 (v2023.03.01) |
| Oct 28, 2024 | 60.96% (0.60955) | 97.87th | v3 (v2023.03.01) |
| Jul 14, 2024 | 72.41% (0.72406) | 98.12th | v3 (v2023.03.01) |
| Jun 20, 2024 | 76.03% (0.76033) | 98.19th | v3 (v2023.03.01) |
| Jun 1, 2024 | 80.47% (0.80465) | 98.32th | v3 (v2023.03.01) |
| May 11, 2024 | 83.45% (0.83447) | 98.43th | v3 (v2023.03.01) |
| Mar 29, 2024 | 85.44% (0.85443) | 98.47th | v3 (v2023.03.01) |
| Dec 13, 2023 | 88.04% (0.88040) | 98.38th | v3 (v2023.03.01) |
| Mar 7, 2023 | 90.18% (0.90178) | 98.17th | v3 (v2023.03.01) |
| Mar 6, 2023 | 7.15% (0.07154) | 92.28th | v2 (v2022.01.01) |
| Apr 1, 2022 | 7.15% (0.07154) | 91.53th | v2 (v2022.01.01) |
| Feb 4, 2022 | 7.15% (0.07154) | 80.03th | v2 (v2022.01.01) |
| Feb 3, 2022 | 4.04% (0.04044) | 73.92th | v1 |
| Jan 6, 2022 | 4.04% (0.04044) | 73.69th | v1 |
| Sep 1, 2021 | 4.04% (0.04044) | 83.24th | v1 |
| Apr 14, 2021 | 4.04% (0.04044) | 0.00th | v1 |
References (12)
- https://access.redhat.com/errata/RHSA-2019:0059 vendor-advisoryx_refsource_REDHATThird Party Advisory
- https://access.redhat.com/security/cve/CVE-2018-15127 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1661102 Issue Tracking
- https://ics-cert.kaspersky.com/advisories/klcert-advisories/2018/12/19/klcert-18-028-libvnc-heap-out-of-bound-write/ x_refsource_MISCThird Party Advisory
- https://lists.debian.org/debian-lts-announce/2018/12/msg00017.html mailing-listx_refsource_MLISTMailing ListThird Party Advisory
- https://lists.debian.org/debian-lts-announce/2019/10/msg00042.html mailing-listx_refsource_MLIST
- https://nvd.nist.gov/vuln/detail/CVE-2018-15127
- https://usn.ubuntu.com/3877-1/ vendor-advisoryx_refsource_UBUNTUThird Party Advisory
- https://usn.ubuntu.com/4547-1/ vendor-advisoryx_refsource_UBUNTU
- https://usn.ubuntu.com/4587-1/ vendor-advisoryx_refsource_UBUNTU
- https://www.cve.org/CVERecord?id=CVE-2018-15127
- https://www.debian.org/security/2019/dsa-4383 vendor-advisoryx_refsource_DEBIANThird Party Advisory
Change history (0)
No recorded changes yet.