Vulnerability Name:

CVE-2018-14345 (CCN-146684)

Assigned:2018-07-17
Published:2018-07-17
Updated:2019-10-03
Summary:An issue was discovered in SDDM through 0.17.0. If configured with ReuseSession=true, the password is not checked for users with an already existing session. Any user with access to the system D-Bus can therefore unlock any graphical session. This is related to daemon/Display.cpp and helper/backend/PamBackend.cpp.
CVSS v3 Severity:7.5 High (CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H)
6.5 Medium (Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C)
Exploitability Metrics:Attack Vector (AV): Network
Attack Complexity (AC): High
Privileges Required (PR): Low
User Interaction (UI): None
Scope:Scope (S): Unchanged
Impact Metrics:Confidentiality (C): High
Integrity (I): High
Availibility (A): High
5.3 Medium (CCN CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N)
4.6 Medium (CCN Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N/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): Low
Availibility (A): None
CVSS v2 Severity:6.0 Medium (CVSS v2 Vector: AV:N/AC:M/Au:S/C:P/I:P/A:P)
Exploitability Metrics:Access Vector (AV): Network
Access Complexity (AC): Medium
Authentication (Au): Single_Instance
Impact Metrics:Confidentiality (C): Partial
Integrity (I): Partial
Availibility (A): Partial
5.0 Medium (CCN CVSS v2 Vector: AV:N/AC:L/Au:N/C:N/I:P/A:N)
Exploitability Metrics:Access Vector (AV): Network
Access Complexity (AC): Low
Athentication (Au): None
Impact Metrics:Confidentiality (C): None
Integrity (I): Partial
Availibility (A): None
Vulnerability Type:CWE-613
CWE-287
Vulnerability Consequences:Bypass Security
References:Source: MITRE
Type: CNA
CVE-2018-14345

Source: CCN
Type: Bugzilla – Bug 1101450
(CVE-2018-14345) VUL-0: CVE-2018-14345: sddm: unlock existing sessions without authentication if ReuseSession=true

Source: CONFIRM
Type: Issue Tracking, Patch, Third Party Advisory
https://bugzilla.suse.com/show_bug.cgi?id=1101450

Source: XF
Type: UNKNOWN
sddm-cve201814345-sec-bypass(146684)

Source: CCN
Type: sddm GIT Repository
Fix authentication when reusing an existing session

Source: CONFIRM
Type: Patch, Third Party Advisory
https://github.com/sddm/sddm/commit/147cec383892d143b5e02daa70f1e7def50f5d98

Vulnerable Configuration:Configuration 1:
  • cpe:/a:sddm_project:sddm:*:*:*:*:*:*:*:* (Version <= 0.17.0)

    • * Denotes that component is vulnerable
    Oval Definitions
    Definition IDClassTitleLast Modified
    oval:org.opensuse.security:def:201814345
    V
    		CVE-2018-14345
    2022-06-30
    oval:org.opensuse.security:def:360
    P
    		sddm-0.19.0-lp154.3.6 on GA media (Moderate)
    2022-06-10
    oval:org.opensuse.security:def:113432
    P
    		sddm-0.19.0-4.2 on GA media (Moderate)
    2022-01-17
    oval:org.opensuse.security:def:106833
    P
    		sddm-0.19.0-4.2 on GA media (Moderate)
    2021-10-01
    oval:com.ubuntu.xenial:def:2018143450000000
    V
    		CVE-2018-14345 on Ubuntu 16.04 LTS (xenial) - medium.
    2018-07-17
    oval:com.ubuntu.artful:def:201814345000
    V
    		CVE-2018-14345 on Ubuntu 17.10 (artful) - medium.
    2018-07-17
    oval:com.ubuntu.disco:def:2018143450000000
    V
    		CVE-2018-14345 on Ubuntu 19.04 (disco) - medium.
    2018-07-17
    oval:com.ubuntu.bionic:def:201814345000
    V
    		CVE-2018-14345 on Ubuntu 18.04 LTS (bionic) - medium.
    2018-07-17
    oval:com.ubuntu.cosmic:def:2018143450000000
    V
    		CVE-2018-14345 on Ubuntu 18.10 (cosmic) - medium.
    2018-07-17
    oval:com.ubuntu.cosmic:def:201814345000
    V
    		CVE-2018-14345 on Ubuntu 18.10 (cosmic) - medium.
    2018-07-17
    oval:com.ubuntu.bionic:def:2018143450000000
    V
    		CVE-2018-14345 on Ubuntu 18.04 LTS (bionic) - medium.
    2018-07-17
    oval:com.ubuntu.xenial:def:201814345000
    V
    		CVE-2018-14345 on Ubuntu 16.04 LTS (xenial) - medium.
    2018-07-17
    BACK
    sddm_project sddm *