LibVNCServer up to 0.9.12 libvncclient/sockets.c Filename buffer overflow

CVSS Meta Temp Score
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CTI Interest Score
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7.1$0-$5k0.00

Summaryinfo

A vulnerability was found in LibVNCServer up to 0.9.12 and classified as critical. Impacted is an unknown function of the file libvncclient/sockets.c. Executing a manipulation as part of Filename can lead to buffer overflow. This vulnerability is tracked as CVE-2019-20839. The attack can be launched remotely. No exploit exists. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability was found in LibVNCServer up to 0.9.12. It has been declared as critical. This vulnerability affects an unknown code of the file libvncclient/sockets.c. The manipulation as part of a Filename leads to a buffer overflow vulnerability. The CWE definition for the vulnerability is CWE-120. The product copies an input buffer to an output buffer without verifying that the size of the input buffer is less than the size of the output buffer, leading to a buffer overflow. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

libvncclient/sockets.c in LibVNCServer before 0.9.13 has a buffer overflow via a long socket filename.

The weakness was disclosed 06/17/2020. This vulnerability was named CVE-2019-20839 since 06/17/2020. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. There are known technical details, but no exploit is available.

Upgrading to version 0.9.13 eliminates this vulnerability.

The entries VDB-156833 and VDB-156830 are pretty similar. VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.4
VulDB Meta Temp Score: 7.2

VulDB Base Score: 7.3
VulDB Temp Score: 7.0
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.5
NVD Vector: 🔍

CVSSv2info

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

NVD Base Score: 🔍

Exploitinginfo

Class: Buffer overflow
CWE: CWE-120 / 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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Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: LibVNCServer 0.9.13

Timelineinfo

06/17/2020 🔍
06/17/2020 +0 days 🔍
06/18/2020 +1 days 🔍
06/18/2020 +0 days 🔍

Sourcesinfo

Status: Not defined

CVE: CVE-2019-20839 (🔍)
GCVE (CVE): GCVE-0-2019-20839
GCVE (VulDB): GCVE-100-156832
See also: 🔍

Entryinfo

Created: 06/18/2020 06:55
Updated: 06/18/2020 07:00
Changes: 06/18/2020 06:55 (38), 06/18/2020 07:00 (17)
Complete: 🔍
Cache ID: 216::103

VulDB is the best source for vulnerability data and more expert information about this specific topic.

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