libvncserver: NULL pointer dereference flaw in framebuffer setup
Published Dec 15, 2014
7.5
HIGHCVSS 2.0
EPSS 6.75%
Description
The HandleRFBServerMessage function in libvncclient/rfbproto.c in LibVNCServer 0.9.9 and earlier does not check certain malloc return values, which allows remote VNC servers to cause a denial of service (application crash) or possibly execute arbitrary code by specifying a large screen size in a (1) FramebufferUpdate, (2) ResizeFrameBuffer, or (3) PalmVNCReSizeFrameBuffer message.
Affected products
No data.
Configuration 1
- ≤ 0.9.9
Configuration 3
- 7.0
Configuration 4
- 12.04
- 14.04
No data.
Red Hat Enterprise Linux 6
libvncserver-0:0.9.7-7.el6_6.1
Fixed · RHSA-2014:1826
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 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 1, 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 (14 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 6.75% (0.06755) | 93.77th | v5 (v2026.06.15) |
| Jun 15, 2026 | 6.75% (0.06755) | 93.11th | v5 (v2026.06.15) |
| Apr 8, 2025 | 4.54% (0.04540) | 88.18th | v4 (v2025.03.14) |
| Mar 30, 2025 | 3.52% (0.03524) | 86.53th | v4 (v2025.03.14) |
| Mar 29, 2025 | 12.73% (0.12734) | 89.98th | v4 (v2025.03.14) |
| Mar 17, 2025 | 3.52% (0.03524) | 86.86th | v4 (v2025.03.14) |
| Dec 12, 2024 | 1.11% (0.01107) | 85.13th | v3 (v2023.03.01) |
| Jan 9, 2024 | 1.11% (0.01107) | 82.88th | v3 (v2023.03.01) |
| Nov 22, 2023 | 0.99% (0.00991) | 81.85th | v3 (v2023.03.01) |
| Aug 22, 2023 | 1.31% (0.01310) | 84.22th | v3 (v2023.03.01) |
| Mar 7, 2023 | 1.11% (0.01110) | 82.25th | 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 (18)
- http://lists.opensuse.org/opensuse-updates/2015-12/msg00022.html vendor-advisoryx_refsource_SUSE
- http://seclists.org/oss-sec/2014/q3/639 mailing-listx_refsource_MLISTMailing ListThird Party Advisory
- http://secunia.com/advisories/61506 third-party-advisoryx_refsource_SECUNIAPermissions RequiredThird Party Advisory
- http://secunia.com/advisories/61682 third-party-advisoryx_refsource_SECUNIAPermissions RequiredThird Party Advisory
- http://ubuntu.com/usn/usn-2365-1 vendor-advisoryx_refsource_UBUNTUThird 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_MISCThird Party AdvisoryUS Government Resource
- http://www.openwall.com/lists/oss-security/2014/09/25/11 mailing-listx_refsource_MLISTMailing ListThird Party Advisory
- http://www.oracle.com/technetwork/topics/security/bulletinoct2015-2511968.html x_refsource_CONFIRMThird Party Advisory
- http://www.securityfocus.com/bid/70091 vdb-entryx_refsource_BID
- https://access.redhat.com/security/cve/CVE-2014-6052 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1144288 Issue Tracking
- https://github.com/newsoft/libvncserver/commit/85a778c0e45e87e35ee7199f1f25020648e8b812 x_refsource_CONFIRMExploitIssue TrackingPatch
- https://lists.debian.org/debian-lts-announce/2019/10/msg00042.html mailing-listx_refsource_MLIST
- https://nvd.nist.gov/vuln/detail/CVE-2014-6052
- https://security.gentoo.org/glsa/201507-07 vendor-advisoryx_refsource_GENTOO
- https://usn.ubuntu.com/4587-1/ vendor-advisoryx_refsource_UBUNTU
- https://www.cve.org/CVERecord?id=CVE-2014-6052
Change history (0)
No recorded changes yet.