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EulerOS 2.0 SP2 : libvncserver (EulerOS-SA-2020-2362)

high Nessus Plugin ID 142357

Synopsis

The remote EulerOS host is missing multiple security updates.

Description

According to the versions of the libvncserver package installed, the EulerOS installation on the remote host is affected by the following vulnerabilities :

 - An issue was discovered in LibVNCServer before 0.9.13.
 There is an information leak (of uninitialized memory contents) in the libvncclient/rfbproto.c ConnectToRFBRepeater function.(CVE-2018-21247)

 - libvncclient/sockets.c in LibVNCServer before 0.9.13 has a buffer overflow via a long socket filename.(CVE-2019-20839)

 - An issue was discovered in LibVNCServer before 0.9.13.
 libvncserver/rfbregion.c has a NULL pointer dereference.(CVE-2020-14397)

 - An issue was discovered in LibVNCServer before 0.9.13.
 An improperly closed TCP connection causes an infinite loop in libvncclient/sockets.c.(CVE-2020-14398)

 - An issue was discovered in LibVNCServer before 0.9.13.
 Byte-aligned data is accessed through uint32_t pointers in libvncclient/rfbproto.c.(CVE-2020-14399)

 - An issue was discovered in LibVNCServer before 0.9.13.
 Byte-aligned data is accessed through uint16_t pointers in libvncserver/translate.c.(CVE-2020-14400)

 - An issue was discovered in LibVNCServer before 0.9.13.
 libvncserver/scale.c has a pixel_value integer overflow.(CVE-2020-14401)

 - An issue was discovered in LibVNCServer before 0.9.13.
 libvncserver/corre.c allows out-of-bounds access via encodings.(CVE-2020-14402)

 - An issue was discovered in LibVNCServer before 0.9.13.
 libvncserver/hextile.c allows out-of-bounds access via encodings.(CVE-2020-14403)

 - An issue was discovered in LibVNCServer before 0.9.13.
 libvncserver/rre.c allows out-of-bounds access via encodings.(CVE-2020-14404)

 - An issue was discovered in LibVNCServer before 0.9.13.
 libvncclient/rfbproto.c does not limit TextChat size.(CVE-2020-14405)

Note that Tenable Network Security has extracted the preceding description block directly from the EulerOS security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

Solution

Update the affected libvncserver packages.

See Also

http://www.nessus.org/u?f2b5ab90

Plugin Details

Severity: High

ID: 142357

File Name: EulerOS_SA-2020-2362.nasl

Version: 1.5

Type: local

Published: 11/3/2020

Updated: 5/11/2022

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Low

Score: 3.6

CVSS v2

Risk Factor: Medium

Base Score: 6.4

Temporal Score: 4.7

Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:P/A:P

CVSS Score Source: CVE-2020-14401

CVSS v3

Risk Factor: High

Base Score: 7.5

Temporal Score: 6.5

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

CVSS Score Source: CVE-2018-21247

Vulnerability Information

CPE: p-cpe:/a:huawei:euleros:libvncserver, cpe:/o:huawei:euleros:2.0

Required KB Items: Host/local_checks_enabled, Host/EulerOS/release, Host/EulerOS/rpm-list, Host/EulerOS/sp

Excluded KB Items: Host/EulerOS/uvp_version

Exploit Ease: No known exploits are available

Patch Publication Date: 11/3/2020

Reference Information

CVE: CVE-2018-21247, CVE-2019-20839, CVE-2020-14397, CVE-2020-14398, CVE-2020-14399, CVE-2020-14400, CVE-2020-14401, CVE-2020-14402, CVE-2020-14403, CVE-2020-14404, CVE-2020-14405