The HandleRFBServerMessage function in libvncclient/rfbproto.c in LibVNCServer 0.9.9 and…
Priority MEDIUM 42CWE-20Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- — Not recorded in CVSS 2.0
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- Partial · Partial · Partial
- Fix status
- Fixed
Attack profile from CVSS 2.0 · NVD. Fix status from CNA and Red Hat.
Summary
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.
Why it matters now
EPSS 0.06755 94th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Fixed Red Hat: 1 advisory
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
CPE configurations NVD · 5
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:libvncserver:libvncserver:*:*:*:*:*:*:*:* | up to 0.9.9 | Vulnerable | Libvncserver |
| cpe:2.3:o:oracle:solaris:11.3:*:*:*:*:*:*:* | 11.3 | Vulnerable | Oracle |
| cpe:2.3:o:debian:debian_linux:7.0:*:*:*:*:*:*:* | 7.0 | Vulnerable | Debian |
| cpe:2.3:o:canonical:ubuntu_linux:12.04:*:*:*:lts:*:*:* | 12.04 | Vulnerable | Canonical |
| cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:lts:*:*:* | 14.04 | Vulnerable | Canonical |
- cpe:2.3:a:libvncserver:libvncserver:*:*:*:*:*:*:*:* Versions up to 0.9.9 Vulnerable ·Libvncserver
- cpe:2.3:o:oracle:solaris:11.3:*:*:*:*:*:*:* Versions 11.3 Vulnerable ·Oracle
- cpe:2.3:o:debian:debian_linux:7.0:*:*:*:*:*:*:* Versions 7.0 Vulnerable ·Debian
- cpe:2.3:o:canonical:ubuntu_linux:12.04:*:*:*:lts:*:*:* Versions 12.04 Vulnerable ·Canonical
- cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:lts:*:*:* Versions 14.04 Vulnerable ·Canonical
Remediation
Red Hat 1 advisory
- RHSA-2014:1826 Released 2014-11-11 · Red Hat rating Moderatelibvncserver security update
- Red Hat Enterprise Linux Client (v. 7) libvncserver-0.9.9-9.el7_0.1
- Red Hat Enterprise Linux Client Optional (v. 7) libvncserver-devel-0.9.9-9.el7_0.1
- Red Hat Enterprise Linux Desktop (v. 6) libvncserver-0.9.7-7.el6_6.1
- Red Hat Enterprise Linux Desktop Optional (v. 6) libvncserver-0.9.7-7.el6_6.1, libvncserver-devel-0.9.7-7.el6_6.1
- Red Hat Enterprise Linux Server (v. 6) libvncserver-0.9.7-7.el6_6.1
- Red Hat Enterprise Linux Server (v. 7) libvncserver-0.9.9-9.el7_0.1
- Red Hat Enterprise Linux Server Optional (v. 6) libvncserver-0.9.7-7.el6_6.1, libvncserver-0.9.7-7.el6_6.1.ppc, libvncserver-devel-0.9.7-7.el6_6.1 +1
- Red Hat Enterprise Linux Server Optional (v. 7) libvncserver-devel-0.9.9-9.el7_0.1
- Red Hat Enterprise Linux Workstation (v. 6) libvncserver-0.9.7-7.el6_6.1
- Red Hat Enterprise Linux Workstation (v. 7) libvncserver-0.9.9-9.el7_0.1
- Red Hat Enterprise Linux Workstation Optional (v. 6) libvncserver-0.9.7-7.el6_6.1, libvncserver-devel-0.9.7-7.el6_6.1
- Red Hat Enterprise Linux Workstation Optional (v. 7) libvncserver-devel-0.9.9-9.el7_0.1
Vendor assessments
Red Hat
Red Hat rating: Moderate. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat Enterprise Linux Client (v. 7) | Fixed | RHSA-2014:1826 |
| Red Hat Enterprise Linux Client Optional (v. 7) | Fixed | RHSA-2014:1826 |
| Red Hat Enterprise Linux Desktop (v. 6) | Fixed | RHSA-2014:1826 |
| Red Hat Enterprise Linux Desktop Optional (v. 6) | Fixed | RHSA-2014:1826 |
| Red Hat Enterprise Linux Server (v. 6) | Fixed | RHSA-2014:1826 |
| Red Hat Enterprise Linux Server (v. 7) | Fixed | RHSA-2014:1826 |
| Red Hat Enterprise Linux Server Optional (v. 6) | Fixed | RHSA-2014:1826 |
| Red Hat Enterprise Linux Server Optional (v. 7) | Fixed | RHSA-2014:1826 |
| Red Hat Enterprise Linux Workstation (v. 6) | Fixed | RHSA-2014:1826 |
| Red Hat Enterprise Linux Workstation (v. 7) | Fixed | RHSA-2014:1826 |
| Red Hat Enterprise Linux Workstation Optional (v. 6) | Fixed | RHSA-2014:1826 |
| Red Hat Enterprise Linux Workstation Optional (v. 7) | Fixed | RHSA-2014:1826 |
Not affected: 3 products
- Red Hat Enterprise Linux 5
- Red Hat Enterprise Linux 6
- Red Hat Enterprise Linux 7
Timeline
- 2026-10-02 Threatist record created from CVE-2014-6052
- 2026-10-03 Alias added: GHSA-hph4-vx7v-q23g
References
Advisory 9
- http://www.ocert.org/advisories/ocert-2014-007.html
- openSUSE-SU-2015:2207
- [oss-security] 20140925 [oCERT-2014-007] libvncserver multiple issues
- [oss-security] 20140923 Multiple issues in libVNCserver
- USN-2365-1
- GLSA-201507-07
- DSA-3081
- http://www.oracle.com/technetwork/topics/security/bulletinoct2015-2511968.html
- USN-4587-1
Sources
- CVE-2014-6052 · CVE Program
- CVE-2014-6052 · NVD
- FIRST EPSS
- GHSA-hph4-vx7v-q23g · GitHub Advisory Database · CC BY 4.0
- CVE-2014-6052 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences