Vulnerability Name:

CVE-2020-5226 (CCN-175521)

Assigned:2020-01-24
Published:2020-01-24
Updated:2020-01-30
Summary:Cross-site scripting in SimpleSAMLphp before version 1.18.4. The www/erroreport.php script allows error reports to be submitted and sent to the system administrator. Starting with SimpleSAMLphp 1.18.0, a new SimpleSAML\Utils\EMail class was introduced to handle sending emails, implemented as a wrapper of an external dependency. This new wrapper allows us to use Twig templates in order to create the email sent with an error report. Since Twig provides automatic escaping of variables, manual escaping of the free-text field in www/errorreport.php was removed to avoid double escaping. However, for those not using the new user interface yet, an email template is hardcoded into the class itself in plain PHP. Since no escaping is provided in this template, it is then possible to inject HTML inside the template by manually crafting the contents of the free-text field.
CVSS v3 Severity:5.4 Medium (CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N)
4.7 Medium (Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:L/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): Low
User Interaction (UI): Required
Scope:Scope (S): Changed
Impact Metrics:Confidentiality (C): Low
Integrity (I): Low
Availibility (A): None
4.1 Medium (CCN CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:C/C:L/I:L/A:N)
3.6 Low (CCN Temporal CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:C/C:L/I:L/A:N/E:U/RL:O/RC:C)
Exploitability Metrics:Attack Vector (AV): Local
Attack Complexity (AC): High
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:3.5 Low (CVSS v2 Vector: AV:N/AC:M/Au:S/C:N/I:P/A:N)
Exploitability Metrics:Access Vector (AV): Network
Access Complexity (AC): Medium
Authentication (Au): Single_Instance
Impact Metrics:Confidentiality (C): None
Integrity (I): Partial
Availibility (A): None
2.4 Low (CCN CVSS v2 Vector: AV:L/AC:H/Au:S/C:P/I:P/A:N)
Exploitability Metrics:Access Vector (AV): Local
Access Complexity (AC): High
Athentication (Au): Single_Instance
Impact Metrics:Confidentiality (C): Partial
Integrity (I): Partial
Availibility (A): None
Vulnerability Type:CWE-79
Vulnerability Consequences:Cross-Site Scripting
References:Source: MITRE
Type: CNA
CVE-2020-5226

Source: XF
Type: UNKNOWN
simplesaml-cve20205226-xss(175521)

Source: CCN
Type: simplesamlphp GitHub Web site
Cross-site scripting in error reports

Source: CONFIRM
Type: Third Party Advisory
https://github.com/simplesamlphp/simplesamlphp/security/advisories/GHSA-mj9p-v2r8-wf8w

Source: CCN
Type: SimpleSAMLphp Security Advisory 202001-01
Cross-site scripting in error reports

Source: MISC
Type: Vendor Advisory
https://simplesamlphp.org/security/202001-01

Source: CCN
Type: WhiteSource Vulnerability Database
CVE-2020-5226

Vulnerable Configuration:Configuration 1:
  • cpe:/a:simplesamlphp:simplesamlphp:*:*:*:*:*:*:*:* (Version < 1.18.4)

    • Configuration CCN 1:
  • cpe:/a:simplesamlphp:simplesamlphp:1.18.0:rc1:*:*:*:*:*:*

    • * Denotes that component is vulnerable
    Oval Definitions
    Definition IDClassTitleLast Modified
    oval:com.ubuntu.bionic:def:202052260000000
    V
    		CVE-2020-5226 on Ubuntu 18.04 LTS (bionic) - untriaged.
    2020-01-24
    oval:com.ubuntu.xenial:def:202052260000000
    V
    		CVE-2020-5226 on Ubuntu 16.04 LTS (xenial) - untriaged.
    2020-01-24
    BACK
    simplesamlphp simplesamlphp *
    simplesamlphp simplesamlphp 1.18.0 rc1