PT-2017-17704 · Tigervnc+3 · Tigervnc+3

Carnil · Published 2017-04-01 · Updated 2018-01-13 · CVE-2017-7394

Positive Technologies (AI Summary)

CVSS v3.1

7.5

High

Base vector

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

Name of the Vulnerable Software and Affected Versions TigerVNC version 1.7.1

Description The issue allows unauthenticated users to crash the server by sending long usernames, specifically in the SSecurityPlain::processMsg function within the SSecurityPlain.cxx file.

Recommendations For TigerVNC version 1.7.1, consider restricting access to the server to prevent unauthenticated users from sending long usernames until a patch is available. As a temporary workaround, limiting the length of usernames that can be processed by the server may help mitigate the risk of exploitation.

Fix

RCE

Weakness Enumeration

CWE-20

Related Identifiers

CESA-2017_2000

CVE-2017-7394

RHSA-2017:2000

RHSA-2017_2000

SUSE-SU-2017:1093-1

SUSE-SU-2017:1094-1

Affected Products

Centos

Red Hat

Suse

Tigervnc

References · 30

• https://github.com/TigerVNC/tigervnc/pull/440 · Patch
• https://nvd.nist.gov/vuln/detail/CVE-2017-7394 · Security Note
• https://access.redhat.com/errata/RHSA-2017:2000 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2017-7394 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2017-7394 · Vendor Advisory
• https://linux.oracle.com/errata/ELSA-2017-2000.html · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2017-7394 · Security Note
• https://osv.dev/vulnerability/DEBIAN-CVE-2017-7394 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2017:1093-1 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2017-7394 · Vendor Advisory
• https://ubuntu.com/security/CVE-2017-7394 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2017:1094-1 · Vendor Advisory
• https://security.gentoo.org/glsa/201801-13 · Vendor Advisory
• http://securityfocus.com/bid/97305 · Note
• https://bugzilla.suse.com/1031879 · Note