libvncserver: integer overflow flaw, leading to a heap-based buffer overflow in screen size handling
Published Sep 30, 2014
7.5
HIGHCVSS 2.0
EPSS 8.27%
Description
Integer overflow in the MallocFrameBuffer function in vncviewer.c in LibVNCServer 0.9.9 and earlier allows remote VNC servers to cause a denial of service (crash) and possibly execute arbitrary code via an advertisement for a large screen size, which triggers a heap-based buffer overflow.
Affected products
No data.
Configuration 1
- 6.5
- 6.5.z
Configuration 2
- 20
- 21
Configuration 3
- ≤ 0.9.9
Configuration 4
- 7.0
No data.
Red Hat Enterprise Linux 6
libvncserver-0:0.9.7-7.el6_6.1
Fixed · RHSA-2014:1826
Red Hat Enterprise Linux 6.5 Extended Update Support
libvncserver-0:0.9.7-7.el6_5.1
Fixed · RHSA-2015:0113
Red Hat Enterprise Linux 7
libvncserver-0:0.9.9-9.el7_0.1
Fixed · RHSA-2014:1826
Red Hat Enterprise Linux 5
kdenetwork
Not affected
Red Hat Enterprise Linux 6
kdenetwork
Not affected
Red Hat Enterprise Linux 7
kdenetwork
Not affected
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 6 | libvncserver-0:0.9.7-7.el6_6.1 | Fixed | RHSA-2014:1826 |
| Red Hat Enterprise Linux 6.5 Extended Update Support | libvncserver-0:0.9.7-7.el6_5.1 | Fixed | RHSA-2015:0113 |
| Red Hat Enterprise Linux 7 | libvncserver-0:0.9.9-9.el7_0.1 | Fixed | RHSA-2014:1826 |
| Red Hat Enterprise Linux 5 | kdenetwork | Not affected | n/a |
| Red Hat Enterprise Linux 6 | kdenetwork | Not affected | n/a |
| Red Hat Enterprise Linux 7 | kdenetwork | 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.
No CVSS v3.0 score for this CVE.
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
2022–2026- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (13 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 3, 2026 | 8.27% (0.08272) | 94.76th | v5 (v2026.06.15) |
| Jun 15, 2026 | 8.12% (0.08118) | 94.09th | v5 (v2026.06.15) |
| May 16, 2026 | 7.98% (0.07984) | 92.16th | v4 (v2025.03.14) |
| Mar 30, 2025 | 6.78% (0.06776) | 90.40th | v4 (v2025.03.14) |
| Mar 29, 2025 | 21.70% (0.21698) | 93.06th | v4 (v2025.03.14) |
| Mar 17, 2025 | 6.60% (0.06605) | 90.49th | v4 (v2025.03.14) |
| Dec 12, 2024 | 1.01% (0.01006) | 84.33th | v3 (v2023.03.01) |
| May 3, 2024 | 1.01% (0.01006) | 83.54th | v3 (v2023.03.01) |
| Jun 7, 2023 | 1.01% (0.01006) | 81.54th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.95% (0.00954) | 80.85th | v3 (v2023.03.01) |
| Mar 6, 2023 | 4.23% (0.04229) | 87.47th | v2 (v2022.01.01) |
| Apr 1, 2022 | 4.23% (0.04229) | 86.19th | v2 (v2022.01.01) |
| Feb 4, 2022 | 4.23% (0.04229) | 69.94th | v2 (v2022.01.01) |
References (21)
- http://lists.fedoraproject.org/pipermail/package-announce/2014-October/139654.html vendor-advisoryx_refsource_FEDORAThird Party Advisory
- http://lists.fedoraproject.org/pipermail/package-announce/2014-September/139445.html vendor-advisoryx_refsource_FEDORAThird Party Advisory
- http://lists.opensuse.org/opensuse-updates/2015-12/msg00022.html vendor-advisoryx_refsource_SUSE
- http://rhn.redhat.com/errata/RHSA-2015-0113.html vendor-advisoryx_refsource_REDHATThird Party Advisory
- http://seclists.org/oss-sec/2014/q3/639 mailing-listx_refsource_MLISTThird Party Advisory
- http://secunia.com/advisories/61506 third-party-advisoryx_refsource_SECUNIAPermissions RequiredThird Party Advisory
- http://www.debian.org/security/2014/dsa-3081 vendor-advisoryx_refsource_DEBIANThird Party Advisory
- http://www.ocert.org/advisories/ocert-2014-007.html x_refsource_MISCPatchThird Party AdvisoryUS Government Resource
- http://www.openwall.com/lists/oss-security/2014/09/25/11 mailing-listx_refsource_MLISTThird Party Advisory
- http://www.oracle.com/technetwork/topics/security/bulletinoct2015-2511968.html x_refsource_CONFIRMThird Party Advisory
- http://www.securityfocus.com/bid/70093 vdb-entryx_refsource_BID
- https://access.redhat.com/security/cve/CVE-2014-6051 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1144287 Issue Tracking
- https://github.com/newsoft/libvncserver/commit/045a044e8ae79db9244593fbce154cdf6e843273 x_refsource_CONFIRMPatchThird Party Advisory
- https://lists.debian.org/debian-lts-announce/2019/10/msg00042.html mailing-listx_refsource_MLIST
- https://nvd.nist.gov/vuln/detail/CVE-2014-6051
- https://security.gentoo.org/glsa/201507-07 vendor-advisoryx_refsource_GENTOO
- https://security.gentoo.org/glsa/201612-36 vendor-advisoryx_refsource_GENTOO
- https://usn.ubuntu.com/4587-1/ vendor-advisoryx_refsource_UBUNTU
- https://www.cve.org/CVERecord?id=CVE-2014-6051
- https://www.kde.org/info/security/advisory-20140923-1.txt x_refsource_CONFIRMThird Party Advisory
Change history (0)
No recorded changes yet.