Vulnerability Name:

CVE-2021-3639 (CCN-234129)

Assigned:2021-07-29
Published:2021-07-29
Updated:2023-02-12
Summary:A flaw was found in mod_auth_mellon where it does not sanitize logout URLs properly. This issue could be used by an attacker to facilitate phishing attacks by tricking users into visiting a trusted web application URL that redirects to an external and potentially malicious server. The highest threat from this liability is to confidentiality and integrity.
CVSS v3 Severity:6.1 Medium (CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N)
5.3 Medium (Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/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): Required
Scope:Scope (S): Changed
Impact Metrics:Confidentiality (C): Low
Integrity (I): Low
Availibility (A): None
6.1 Medium (CCN CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N)
5.3 Medium (CCN Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/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): Required
Scope:Scope (S): Changed
Impact Metrics:Confidentiality (C): Low
Integrity (I): Low
Availibility (A): None
6.1 Medium (REDHAT CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N)
5.3 Medium (REDHAT Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/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): Required
Scope:Scope (S): Changed
Impact Metrics:Confidentiality (C): Low
Integrity (I): Low
Availibility (A): None
CVSS v2 Severity:5.5 Medium (CCN CVSS v2 Vector: AV:N/AC:L/Au:S/C:P/I:P/A:N)
Exploitability Metrics:Access Vector (AV): Network
Access Complexity (AC): Low
Athentication (Au): Single_Instance
Impact Metrics:Confidentiality (C): Partial
Integrity (I): Partial
Availibility (A): None
Vulnerability Type:CWE-601
Vulnerability Consequences:Other
References:Source: MITRE
Type: CNA
CVE-2021-3639

Source: secalert@redhat.com
Type: Patch, Third Party Advisory
secalert@redhat.com

Source: CCN
Type: Red Hat Bugzilla - Bug 1980648
(CVE-2021-3639) - CVE-2021-3639 mod_auth_mellon: Open Redirect vulnerability in logout URLs

Source: secalert@redhat.com
Type: Issue Tracking, Third Party Advisory
secalert@redhat.com

Source: XF
Type: UNKNOWN
modauthmellon-cve20213639-open-redirect(234129)

Source: CCN
Type: mod_auth_mellon GIT Repository
Prevent redirect to URLs that begin with '///'

Source: secalert@redhat.com
Type: Patch, Third Party Advisory
secalert@redhat.com

Vulnerable Configuration:Configuration RedHat 1:
  • cpe:/a:redhat:enterprise_linux:8:*:*:*:*:*:*:*
    • Configuration RedHat 2:
  • cpe:/a:redhat:enterprise_linux:8::appstream:*:*:*:*:*

    • * Denotes that component is vulnerable
    Oval Definitions
    Definition IDClassTitleLast Modified
    oval:org.opensuse.security:def:3465
    P
    		cups-pk-helper-0.2.5-5.1 on GA media (Moderate)
    2022-06-28
    oval:org.opensuse.security:def:95095
    P
    		apache2-mod_auth_mellon-0.17.0-150200.5.7.1 on GA media (Moderate)
    2022-06-22
    oval:com.redhat.rhsa:def:20221934
    P
    		RHSA-2022:1934: mod_auth_mellon security update (Moderate)
    2022-05-10
    oval:org.opensuse.security:def:118701
    P
    		Security update for apache2-mod_auth_mellon (Moderate)
    2022-05-04
    oval:org.opensuse.security:def:119388
    P
    		Security update for apache2-mod_auth_mellon (Moderate)
    2022-05-04
    oval:org.opensuse.security:def:1664
    P
    		Security update for apache2-mod_auth_mellon (Moderate)
    2022-05-04
    oval:org.opensuse.security:def:118891
    P
    		Security update for apache2-mod_auth_mellon (Moderate)
    2022-05-04
    oval:org.opensuse.security:def:119573
    P
    		Security update for apache2-mod_auth_mellon (Moderate)
    2022-05-04
    oval:org.opensuse.security:def:119088
    P
    		Security update for apache2-mod_auth_mellon (Moderate)
    2022-05-04
    oval:org.opensuse.security:def:471
    P
    		Security update for apache2-mod_auth_mellon (Moderate)
    2022-05-04
    oval:org.opensuse.security:def:119198
    P
    		Security update for apache2-mod_auth_mellon (Moderate)
    2022-05-04
    oval:org.opensuse.security:def:102241
    P
    		Security update for apache2-mod_auth_mellon (Moderate) (in QA)
    2022-04-06
    oval:org.opensuse.security:def:34523
    P
    		Security update for apache2-mod_auth_mellon (Moderate)
    2021-09-02
    oval:org.opensuse.security:def:60346
    P
    		Security update for apache2-mod_auth_mellon (Moderate)
    2021-09-02
    BACK