Vulnerability Name:

CVE-2018-20176 (CCN-156614)

Assigned:2018-12-17
Published:2019-02-05
Updated:2019-03-21
Summary:rdesktop versions up to and including v1.8.3 contain several Out-Of- Bounds Reads in the file secure.c that result 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-2018-20176

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

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

Source: BID
Type: UNKNOWN
106938

Source: XF
Type: UNKNOWN
rdesktop-cve201820176-dos(156614)

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: UNKNOWN
[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: UNKNOWN
GLSA-201903-06

Source: DEBIAN
Type: UNKNOWN
DSA-4394

Source: CCN
Type: WhiteSource Vulnerability Database
CVE-2018-20176

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

    • 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:201820176
    V
    		CVE-2018-20176
    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:2018201760000000
    V
    		CVE-2018-20176 on Ubuntu 19.04 (disco) - medium.
    2019-03-15
    oval:com.ubuntu.bionic:def:201820176000
    V
    		CVE-2018-20176 on Ubuntu 18.04 LTS (bionic) - medium.
    2019-03-15
    oval:com.ubuntu.cosmic:def:2018201760000000
    V
    		CVE-2018-20176 on Ubuntu 18.10 (cosmic) - medium.
    2019-03-15
    oval:com.ubuntu.cosmic:def:201820176000
    V
    		CVE-2018-20176 on Ubuntu 18.10 (cosmic) - medium.
    2019-03-15
    oval:com.ubuntu.bionic:def:2018201760000000
    V
    		CVE-2018-20176 on Ubuntu 18.04 LTS (bionic) - medium.
    2019-03-15
    oval:com.ubuntu.trusty:def:201820176000
    V
    		CVE-2018-20176 on Ubuntu 14.04 LTS (trusty) - medium.
    2019-03-15
    oval:com.ubuntu.xenial:def:2018201760000000
    V
    		CVE-2018-20176 on Ubuntu 16.04 LTS (xenial) - medium.
    2019-03-15
    oval:com.ubuntu.xenial:def:201820176000
    V
    		CVE-2018-20176 on Ubuntu 16.04 LTS (xenial) - medium.
    2019-03-15
    BACK
    rdesktop rdesktop *
    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