LibVNCServer 0.9.9 rfbserver.c memory corruption

CVSS Meta Temp Score
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CTI Interest Score
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6.3$0-$5k0.00

Summaryinfo

A vulnerability, which was classified as critical, was found in LibVNCServer 0.9.9. This impacts an unknown function of the file rfbserver.c. Such manipulation leads to memory corruption. This vulnerability is documented as CVE-2014-6055. There is not any exploit available.

Detailsinfo

A vulnerability, which was classified as critical, has been found in LibVNCServer 0.9.9. Affected by this issue is some unknown functionality of the file rfbserver.c. The manipulation with an unknown input leads to a memory corruption vulnerability. Using CWE to declare the problem leads to CWE-119. The product performs operations on a memory buffer, but it can read from or write to a memory location that is outside of the intended boundary of the buffer. Impacted is confidentiality, integrity, and availability. CVE summarizes:

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.

The weakness was released 09/30/2014 by Nicolas Ruff as confirmed advisory (CERT.org). The advisory is shared for download at ocert.org. This vulnerability is handled as CVE-2014-6055 since 09/01/2014. The exploitation is known to be easy. The attack may be launched remotely. A simple authentication is required for exploitation. There are known technical details, but no exploit is available.

The vulnerability scanner Nessus provides a plugin with the ID 77837 (FreeBSD : krfb -- Multiple security issues in bundled libvncserver (fb25333d-442f-11e4-98f3-5453ed2e2b49)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family FreeBSD Local Security Checks. The commercial vulnerability scanner Qualys is able to test this issue with plugin 168339 (SUSE Enterprise Linux Security update for LibVNCServer (SUSE-SU-2015:2088-2)).

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the databases at X-Force (96187), Tenable (77837), SecurityFocus (BID 70096†), Secunia (SA61506†) and Vulnerability Center (SBV-46330†). Entries connected to this vulnerability are available at VDB-71842, VDB-71695, VDB-73231 and VDB-73230. VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.3
VulDB Meta Temp Score: 6.3

VulDB Base Score: 6.3
VulDB Temp Score: 6.3
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Memory corruption
CWE: CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 77837
Nessus Name: FreeBSD : krfb -- Multiple security issues in bundled libvncserver (fb25333d-442f-11e4-98f3-5453ed2e2b49)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Port: 🔍

OpenVAS ID: 703081
OpenVAS Name: Debian Security Advisory DSA 3081-1 (libvncserver - security update)
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍

Patch: github.com

Timelineinfo

09/01/2014 🔍
09/23/2014 +22 days 🔍
09/23/2014 +0 days 🔍
09/25/2014 +2 days 🔍
09/30/2014 +5 days 🔍
09/30/2014 +0 days 🔍
10/01/2014 +1 days 🔍
10/02/2014 +1 days 🔍
03/26/2015 +175 days 🔍
03/29/2022 +2560 days 🔍

Sourcesinfo

Advisory: 06ccdf016154fde8eccb5355613ba04c59127b2e
Researcher: Nicolas Ruff
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2014-6055 (🔍)
GCVE (CVE): GCVE-0-2014-6055
GCVE (VulDB): GCVE-100-71696

OVAL: 🔍

X-Force: 96187
SecurityFocus: 70096 - LibVNCServer CVE-2014-6055 Multiple Stack Based Buffer Overflow Vulnerabilities
Secunia: 61506 - LibVNCServer Multiple Vulnerabilities, Moderately Critical
Vulnerability Center: 46330 - SourceForge LibVNCServer Remote DoS and Code Execution due to an Error in the File Transfer Feature, Medium

See also: 🔍

Entryinfo

Created: 03/26/2015 16:14
Updated: 03/29/2022 14:52
Changes: 03/26/2015 16:14 (70), 06/08/2017 08:54 (7), 03/29/2022 14:49 (4), 03/29/2022 14:50 (1), 03/29/2022 14:52 (1)
Complete: 🔍
Cache ID: 216:192:103

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