CVE-2014-6055

CVE-2014-6055 is a medium-severity vulnerability in Libvncserver with a CVSS 2.0 base score of 6.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-119.

Key facts

• Severity: Medium (CVSS 2.0 base score 6.5)
• EPSS exploit prediction: 8% (94th percentile)
• Actively exploited: Not listed in CISA KEV
• Weakness: CWE-119
• Affected product: Libvncserver
• Published: 2014-09-30
• Last modified: 2026-06-17

Description

Multiple stack-based buffer overflows in the File Transfer feature in rfbserver.c in LibVNCServer 0.9.9 and earlier allow remote authenticated users to cause a denial of service (crash) and possibly execute arbitrary code via a (1) long file or (2) directory name or the (3) FileTime attribute in a rfbFileTransferOffer message.

Frequently asked questions

What is CVE-2014-6055?

Multiple stack-based buffer overflows in the File Transfer feature in rfbserver.c in LibVNCServer 0.9.9 and earlier allow remote authenticated users to cause a denial of service (crash) and possibly execute arbitrary code via a (1) long file or (2) directory name or the (3) FileTime attribute in a rfbFileTransferOffer message.

How severe is CVE-2014-6055?

CVE-2014-6055 has a CVSS 2.0 base score of 6.5, rated medium severity.

Is CVE-2014-6055 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 8% (94th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2014-6055?

CVE-2014-6055 primarily affects Libvncserver. In total, 6 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2014-6055?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2014-6055 published?

CVE-2014-6055 was published on 2014-09-30 and last updated on 2026-06-17.

References

• http://lists.fedoraproject.org/pipermail/package-announce/2014-October/139654.html
• http://lists.fedoraproject.org/pipermail/package-announce/2014-September/139445.html
• http://lists.opensuse.org/opensuse-updates/2015-12/msg00022.html
• http://rhn.redhat.com/errata/RHSA-2015-0113.html
• http://seclists.org/oss-sec/2014/q3/639
• http://secunia.com/advisories/61506
• http://www.debian.org/security/2014/dsa-3081
• http://www.ocert.org/advisories/ocert-2014-007.html
• http://www.openwall.com/lists/oss-security/2014/09/25/11
• http://www.securityfocus.com/bid/70096
• https://exchange.xforce.ibmcloud.com/vulnerabilities/96187
• https://github.com/newsoft/libvncserver/commit/06ccdf016154fde8eccb5355613ba04c59127b2e
• https://github.com/newsoft/libvncserver/commit/f528072216dec01cee7ca35d94e171a3b909e677
• https://lists.debian.org/debian-lts-announce/2019/10/msg00042.html
• https://security.gentoo.org/glsa/201507-07
• https://usn.ubuntu.com/4587-1/
• https://www.kde.org/info/security/advisory-20140923-1.txt

Affected products (6)

• cpe:2.3:o:fedoraproject:fedora:20:*:*:*:*:*:*:*
• cpe:2.3:o:fedoraproject:fedora:21:*:*:*:*:*:*:*
• cpe:2.3:o:debian:debian_linux:7.0:*:*:*:*:*:*:*
• cpe:2.3:o:redhat:enterprise_linux_server_aus:6.5:*:*:*:*:*:*:*
• cpe:2.3:o:redhat:enterprise_linux_server_eus:6.5.z:*:*:*:*:*:*:*
• cpe:2.3:a:libvncserver:libvncserver:*:*:*:*:*:*:*:*

More vulnerabilities in Libvncserver

• CVE-2014-6052 — High (CVSS 7.5): The HandleRFBServerMessage function in libvncclient/rfbproto.c in LibVNCServer 0.9.9 and earlier does not check certain…
• CVE-2014-6051 — High (CVSS 7.5): Integer overflow in the MallocFrameBuffer function in vncviewer.c in LibVNCServer 0.9.9 and earlier allows remote VNC…
• CVE-2006-2450 — High (CVSS 7.5): auth.c in LibVNCServer 0.7.1 allows remote attackers to bypass authentication via a request in which the client…
• CVE-2014-6053 — Medium (CVSS 5.0): The rfbProcessClientNormalMessage function in libvncserver/rfbserver.c in LibVNCServer 0.9.9 and earlier does not…
• CVE-2014-6054 — Medium (CVSS 4.3): The rfbProcessClientNormalMessage function in libvncserver/rfbserver.c in LibVNCServer 0.9.9 and earlier allows remote…

All CVEs affecting Libvncserver →

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