Vulnerability Name:

CVE-2018-20178 (CCN-156616)

Assigned:2018-12-17
Published:2019-02-05
Updated:2019-09-15
Summary:rdesktop versions up to and including v1.8.3 contain an Out-Of-Bounds Read in the function process_demand_active() that results in a Denial of Service (segfault).
CVSS v3 Severity:7.5 High (CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H)
6.5 Medium (Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C)
Exploitability Metrics:Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): None
Scope:Scope (S): Unchanged
Impact Metrics:Confidentiality (C): None
Integrity (I): None
Availibility (A): High
5.3 Medium (CCN CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:N/A:H)
4.6 Medium (CCN Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C)
Exploitability Metrics:Attack Vector (AV): Network
Attack Complexity (AC): High
Privileges Required (PR): None
User Interaction (UI): Required
Scope:Scope (S): Unchanged
Impact Metrics:Confidentiality (C): None
Integrity (I): None
Availibility (A): High
CVSS v2 Severity:5.0 Medium (CVSS v2 Vector: AV:N/AC:L/Au:N/C:N/I:N/A:P)
Exploitability Metrics:Access Vector (AV): Network
Access Complexity (AC): Low
Authentication (Au): None
Impact Metrics:Confidentiality (C): None
Integrity (I): None
Availibility (A): Partial
4.9 Medium (CCN CVSS v2 Vector: AV:N/AC:H/Au:S/C:N/I:N/A:C)
Exploitability Metrics:Access Vector (AV): Network
Access Complexity (AC): High
Athentication (Au): Single_Instance
Impact Metrics:Confidentiality (C): None
Integrity (I): None
Availibility (A): Complete
Vulnerability Type:CWE-125
Vulnerability Consequences:Denial of Service
References:Source: MITRE
Type: CNA
CVE-2018-20178

Source: SUSE
Type: UNKNOWN
openSUSE-SU-2019:2135

Source: CCN
Type: rdesktop Web site
rdesktop: A Remote Desktop Protocol Client

Source: BID
Type: Third Party Advisory, VDB Entry
106938

Source: XF
Type: UNKNOWN
rdesktop-cve201820178-dos(156616)

Source: CCN
Type: rdesktop GIT Repository
Malicious RDP server security fixes

Source: MISC
Type: Patch, Third Party Advisory
https://github.com/rdesktop/rdesktop/commit/4dca546d04321a610c1835010b5dad85163b65e1

Source: MLIST
Type: Mailing List, Third Party Advisory
[debian-lts-announce] 20190219 [SECURITY] [DLA 1683-1] rdesktop security update

Source: CCN
Type: Check Point Research Web site
Reverse RDP Attack: Code Execution on RDP Clients

Source: CONFIRM
Type: Exploit, Third Party Advisory
https://research.checkpoint.com/reverse-rdp-attack-code-execution-on-rdp-clients/

Source: GENTOO
Type: Third Party Advisory
GLSA-201903-06

Source: DEBIAN
Type: Third Party Advisory
DSA-4394

Source: CCN
Type: WhiteSource Vulnerability Database
CVE-2018-20178

Vulnerable Configuration:Configuration 1:
  • cpe:/a:rdesktop:rdesktop:*:*:*:*:*:*:*:* (Version <= 1.8.3)

    • Configuration 2:
  • cpe:/o:debian:debian_linux:8.0:*:*:*:*:*:*:*
  • OR cpe:/o:debian:debian_linux:9.0:*:*:*:*:*:*:*

    • Configuration CCN 1:
  • cpe:/a:rdesktop:rdesktop:1.5.0:*:*:*:*:*:*:*
  • OR cpe:/a:rdesktop:rdesktop:1.8.3:*:*:*:*:*:*:*
  • OR cpe:/a:rdesktop:rdesktop:1.8.2:*:*:*:*:*:*:*
  • OR cpe:/a:rdesktop:rdesktop:1.8.1:*:*:*:*:*:*:*
  • OR cpe:/a:rdesktop:rdesktop:1.8.0:*:*:*:*:*:*:*
  • OR cpe:/a:rdesktop:rdesktop:1.7.1:*:*:*:*:*:*:*
  • OR cpe:/a:rdesktop:rdesktop:1.7.0:*:*:*:*:*:*:*
  • OR cpe:/a:rdesktop:rdesktop:1.6.0:*:*:*:*:*:*:*

    • * Denotes that component is vulnerable
    Oval Definitions
    Definition IDClassTitleLast Modified
    oval:org.opensuse.security:def:93466
    P
    		 (Important)
    2022-07-06
    oval:org.opensuse.security:def:201820178
    V
    		CVE-2018-20178
    2022-06-30
    oval:org.opensuse.security:def:113329
    P
    		rdesktop-1.9.0-4.6 on GA media (Moderate)
    2022-01-17
    oval:org.opensuse.security:def:106738
    P
    		Security update for tomcat (Important)
    2021-11-16
    oval:org.opensuse.security:def:74370
    P
    		Security update for libass (Important)
    2021-08-20
    oval:org.opensuse.security:def:63481
    P
    		libSDL2-2_0-0-32bit-2.0.8-9.63 on GA media (Moderate)
    2021-08-10
    oval:org.opensuse.security:def:63117
    P
    		python-azure-agent-2.2.45-3.6.1 on GA media (Moderate)
    2020-12-03
    oval:org.opensuse.security:def:62459
    P
    		libnm-gtk-devel-1.8.10-3.39 on GA media (Moderate)
    2020-12-03
    oval:org.opensuse.security:def:63255
    P
    		apache2-mod_wsgi-python3-4.5.18-2.27 on GA media (Moderate)
    2020-12-03
    oval:org.opensuse.security:def:62636
    P
    		gnome-shell-3.34.4+4-1.58 on GA media (Moderate)
    2020-12-03
    oval:org.opensuse.security:def:62435
    P
    		libcdio++0-0.94-4.15 on GA media (Moderate)
    2020-12-03
    oval:org.opensuse.security:def:62915
    P
    		perl-Archive-Extract-0.80-1.24 on GA media (Moderate)
    2020-12-03
    oval:org.opensuse.security:def:62436
    P
    		libcups2-32bit-2.2.7-1.24 on GA media (Moderate)
    2020-12-03
    oval:org.opensuse.security:def:64192
    P
    		ctdb on GA media (Moderate)
    2020-12-01
    oval:org.opensuse.security:def:63942
    P
    		Security update for krb5-appl (Important)
    2020-12-01
    oval:org.opensuse.security:def:64304
    P
    		libXi-devel on GA media (Moderate)
    2020-12-01
    oval:org.opensuse.security:def:64048
    P
    		Security update for webkit2gtk3 (Important)
    2020-12-01
    oval:org.opensuse.security:def:74244
    P
    		Security update for bubblewrap (Moderate)
    2020-12-01
    oval:org.opensuse.security:def:64150
    P
    		Security update for python3 (Important)
    2020-12-01
    oval:org.opensuse.security:def:63808
    P
    		Security update for xen (Important)
    2020-12-01
    oval:org.opensuse.security:def:100179
    P
    		 (Moderate)
    2019-12-27
    oval:org.opensuse.security:def:109994
    P
    		Security update for rdesktop (Important)
    2019-09-14
    oval:com.ubuntu.disco:def:2018201780000000
    V
    		CVE-2018-20178 on Ubuntu 19.04 (disco) - medium.
    2019-03-15
    oval:com.ubuntu.bionic:def:201820178000
    V
    		CVE-2018-20178 on Ubuntu 18.04 LTS (bionic) - medium.
    2019-03-15
    oval:com.ubuntu.cosmic:def:2018201780000000
    V
    		CVE-2018-20178 on Ubuntu 18.10 (cosmic) - medium.
    2019-03-15
    oval:com.ubuntu.cosmic:def:201820178000
    V
    		CVE-2018-20178 on Ubuntu 18.10 (cosmic) - medium.
    2019-03-15
    oval:com.ubuntu.bionic:def:2018201780000000
    V
    		CVE-2018-20178 on Ubuntu 18.04 LTS (bionic) - medium.
    2019-03-15
    oval:com.ubuntu.trusty:def:201820178000
    V
    		CVE-2018-20178 on Ubuntu 14.04 LTS (trusty) - medium.
    2019-03-15
    oval:com.ubuntu.xenial:def:2018201780000000
    V
    		CVE-2018-20178 on Ubuntu 16.04 LTS (xenial) - medium.
    2019-03-15
    oval:com.ubuntu.xenial:def:201820178000
    V
    		CVE-2018-20178 on Ubuntu 16.04 LTS (xenial) - medium.
    2019-03-15
    BACK
    rdesktop rdesktop *
    debian debian linux 8.0
    debian debian linux 9.0
    rdesktop rdesktop 1.5.0
    rdesktop rdesktop 1.8.3
    rdesktop rdesktop 1.8.2
    rdesktop rdesktop 1.8.1
    rdesktop rdesktop 1.8.0
    rdesktop rdesktop 1.7.1
    rdesktop rdesktop 1.7.0
    rdesktop rdesktop 1.6.0