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CVE-2014-6053

23
FAUCET Score

CVE-2014-6053 describes a denial-of-service vulnerability in LibVNCServer versions 0.9.9 and earlier, affecting products like Canonical and Debian Linux distributions. The flaw lies in the rfbProcessClientNormalMessage function, which fails to properly handle large ClientCutText data, leading to excessive memory consumption or daemon crashes due to an unchecked malloc call. This vulnerability has a CVSS score of 5.0, indicating a medium severity with a network attack vector, low complexity, and potential for partial availability impact. While its EPSS score is relatively high, there is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
<= 0.9.9CPE matchmatch criteria
cpe:2.3:a:libvncserver:libvncserver:*:*:*:*:*:*:*:*
12.04CPE matchmatch criteria
cpe:2.3:o:canonical:ubuntu_linux:12.04:*:*:*:lts:*:*:*
14.04CPE matchmatch criteria
cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:lts:*:*:*
7.0CPE matchmatch criteria
cpe:2.3:o:debian:debian_linux:7.0:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

5.0MEDIUM

AV:N/AC:L/Au:N/C:N/I:N/A:P

Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
PARTIAL
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Exploitability Score
10.0
Impact Score
2.9
CvssVersion
2.0

Exploit Intelligence

EPSS Score
7.25%
Probability of exploitation in next 30 days
EPSS Percentile
93.7%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0725 is in the 91st percentile among its peer group of 23,705 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (5)

github_advisorypatch availablevia nvd_reference
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 6Fixed in: libvncserver-0:0.9.7-7.el6_6.1
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: libvncserver-0:0.9.9-9.el7_0.1
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: kdenetwork-7:4.10.5-8.el7_0
View patch
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 5Fixed in: kdenetwork

Vendor Advisories (1)

redhatCVE-2014-6053Moderate

libvncserver: server NULL pointer dereference flaw in ClientCutText message handling

Sep 23, 2014

References

lists.opensuse.org / opensuse-updates/2015-12/msg00022.html
seclists.org / oss-sec/2014/q3/639
Mailing ListThird Party Advisory
secunia.com / advisories/61506
secunia.com / advisories/61682
github.com / newsoft/libvncserver/commit/6037a9074d52b1963c97cb28ea1096c7c14cbf28
Issue TrackingPatch
lists.debian.org / debian-lts-announce/2019/10/msg00042.html
lists.debian.org / debian-lts-announce/2019/11/msg00032.html
lists.debian.org / debian-lts-announce/2019/12/msg00028.html
security.gentoo.org / glsa/201507-07
usn.ubuntu.com / 4573-1
usn.ubuntu.com / 4587-1
ubuntu.com / usn/usn-2365-1
Third Party Advisory
debian.org / security/2014/dsa-3081
Third Party Advisory
ocert.org / advisories/ocert-2014-007.html
Third Party AdvisoryUS Government Resource
openwall.com / lists/oss-security/2014/09/25/11
Mailing ListThird Party Advisory