Vulnerability Name:

CVE-2020-24331 (CCN-186763)

Assigned:2020-06-08
Published:2020-06-08
Updated:2022-04-28
Summary:An issue was discovered in TrouSerS through 0.3.14. If the tcsd daemon is started with root privileges, the tss user still has read and write access to the /etc/tcsd.conf file (which contains various settings related to this daemon).
CVSS v3 Severity:7.8 High (CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H)
6.9 Medium (Temporal CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:U/RC:R)
Exploitability Metrics:Attack Vector (AV): Local
Attack Complexity (AC): Low
Privileges Required (PR): Low
User Interaction (UI): None
Scope:Scope (S): Unchanged
Impact Metrics:Confidentiality (C): High
Integrity (I): High
Availibility (A): High
7.8 High (CCN CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H)
6.9 Medium (CCN Temporal CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:U/RC:R)
Exploitability Metrics:Attack Vector (AV): Local
Attack Complexity (AC): Low
Privileges Required (PR): Low
User Interaction (UI): None
Scope:Scope (S): Unchanged
Impact Metrics:Confidentiality (C): High
Integrity (I): High
Availibility (A): High
7.8 High (REDHAT CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H)
6.9 Medium (REDHAT Temporal CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:U/RC:R)
Exploitability Metrics:Attack Vector (AV): Local
Attack Complexity (AC): Low
Privileges Required (PR): Low
User Interaction (UI): None
Scope:Scope (S): Unchanged
Impact Metrics:Confidentiality (C): High
Integrity (I): High
Availibility (A): High
CVSS v2 Severity:7.2 High (CVSS v2 Vector: AV:L/AC:L/Au:N/C:C/I:C/A:C)
Exploitability Metrics:Access Vector (AV): Local
Access Complexity (AC): Low
Authentication (Au): None
Impact Metrics:Confidentiality (C): Complete
Integrity (I): Complete
Availibility (A): Complete
6.8 Medium (CCN CVSS v2 Vector: AV:L/AC:L/Au:S/C:C/I:C/A:C)
Exploitability Metrics:Access Vector (AV): Local
Access Complexity (AC): Low
Athentication (Au): Single_Instance
Impact Metrics:Confidentiality (C): Complete
Integrity (I): Complete
Availibility (A): Complete
Vulnerability Type:CWE-269
Vulnerability Consequences:Gain Privileges
References:Source: MITRE
Type: CNA
CVE-2020-24331

Source: MLIST
Type: Exploit, Mailing List, Third Party Advisory
[oss-security] 20200814 Re: [TrouSerS-tech] Multiple Security Issues in the TrouSerS tpm1.2 tscd Daemon

Source: CCN
Type: Bugzilla - Bug 1164472
VUL-0: trousers: TrouSerS tcsd privilege escalation tss to root user

Source: MISC
Type: Exploit, Issue Tracking, Third Party Advisory
https://bugzilla.suse.com/show_bug.cgi?id=1164472

Source: XF
Type: UNKNOWN
trousers-cve202024331-priv-esc(186763)

Source: FEDORA
Type: Mailing List, Third Party Advisory
FEDORA-2020-ab3dace708

Source: MISC
Type: Mailing List, Patch, Third Party Advisory
https://seclists.org/oss-sec/2020/q2/att-135/tcsd_fixes.patch

Source: MISC
Type: Exploit, Mailing List, Third Party Advisory
https://sourceforge.net/p/trousers/mailman/message/37015817/

Source: CCN
Type: SourceForge TrouSerS Project Web site
TrouSerS

Source: CCN
Type: IBM Security Bulletin 6493729 (Cloud Pak for Security)
Cloud Pak for Security is vulnerable to several CVEs

Vulnerable Configuration:Configuration 1:
  • cpe:/a:trousers_project:trousers:*:*:*:*:*:*:*:* (Version <= 0.3.14)

    • Configuration 2:
  • cpe:/o:fedoraproject:fedora:33:*:*:*:*:*:*:*

    • Configuration RedHat 1:
  • cpe:/a:redhat:enterprise_linux:8:*:*:*:*:*:*:*

    • Configuration RedHat 2:
  • cpe:/a:redhat:enterprise_linux:8::crb:*:*:*:*:*

    • Configuration RedHat 3:
  • cpe:/o:redhat:enterprise_linux:8:*:*:*:*:*:*:*

    • Configuration RedHat 4:
  • cpe:/o:redhat:enterprise_linux:8::baseos:*:*:*:*:*

    • Configuration CCN 1:
  • cpe:/a:ibm:cloud_pak_for_security:1.7.0.0:*:*:*:*:*:*:*
  • OR cpe:/a:ibm:cloud_pak_for_security:1.7.1.0:*:*:*:*:*:*:*
  • OR cpe:/a:ibm:cloud_pak_for_security:1.7.2.0:*:*:*:*:*:*:*

    • * Denotes that component is vulnerable
    Oval Definitions
    Definition IDClassTitleLast Modified
    oval:org.opensuse.security:def:7684
    P
    		libtspi1-0.3.15-150400.1.10 on GA media (Moderate)
    2023-06-12
    oval:org.opensuse.security:def:3092
    P
    		gstreamer-1.8.3-9.5 on GA media (Moderate)
    2022-06-28
    oval:org.opensuse.security:def:94722
    P
    		libtspi1-0.3.15-150400.1.10 on GA media (Moderate)
    2022-06-22
    oval:org.opensuse.security:def:373
    P
    		trousers-0.3.15-150400.1.10 on GA media (Moderate)
    2022-06-10
    oval:com.redhat.rhsa:def:20211627
    P
    		RHSA-2021:1627: trousers security, bug fix, and enhancement update (Moderate)
    2021-05-18
    BACK
    trousers_project trousers *
    fedoraproject fedora 33
    ibm cloud pak for security 1.7.0.0
    ibm cloud pak for security 1.7.1.0
    ibm cloud pak for security 1.7.2.0