6.8 Medium
CVSS2
Attack Vector
NETWORK
Attack Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
AV:N/AC:M/Au:N/C:P/I:P/A:P
8.1 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
0.018 Low
EPSS
Percentile
88.1%
Issue Overview:
A vulnerability was found in mod_auth_mellon. If Apache is configured as a reverse proxy and mod_auth_mellon is configured to only let through authenticated users (with the require valid-user directive), adding special HTTP headers that are normally used to start the special SAML ECP (non-browser based) can be used to bypass authentication. (CVE-2019-3878)
A vulnerability was found in mod_auth_mellon where an open redirect in the logout URL allows requests with backslashes to pass through by assuming that it is a relative URL, while the browsers silently convert backslash characters into forward slashes treating them as an absolute URL. This mismatch allows an attacker to bypass the redirect URL validation logic in apr_uri_parse function. (CVE-2019-3877)
Affected Packages:
mod24_auth_mellon
Issue Correction:
Run yum update mod24_auth_mellon to update your system.
New Packages:
i686:
mod24_auth_mellon-diagnostics-0.14.0-2.8.amzn1.i686
mod24_auth_mellon-debuginfo-0.14.0-2.8.amzn1.i686
mod24_auth_mellon-0.14.0-2.8.amzn1.i686
src:
mod24_auth_mellon-0.14.0-2.8.amzn1.src
x86_64:
mod24_auth_mellon-diagnostics-0.14.0-2.8.amzn1.x86_64
mod24_auth_mellon-debuginfo-0.14.0-2.8.amzn1.x86_64
mod24_auth_mellon-0.14.0-2.8.amzn1.x86_64
Red Hat: CVE-2019-3877, CVE-2019-3878
Mitre: CVE-2019-3877, CVE-2019-3878
OS | Version | Architecture | Package | Version | Filename |
---|---|---|---|---|---|
Amazon Linux | 1 | i686 | mod24_auth_mellon-diagnostics | < 0.14.0-2.8.amzn1 | mod24_auth_mellon-diagnostics-0.14.0-2.8.amzn1.i686.rpm |
Amazon Linux | 1 | i686 | mod24_auth_mellon-debuginfo | < 0.14.0-2.8.amzn1 | mod24_auth_mellon-debuginfo-0.14.0-2.8.amzn1.i686.rpm |
Amazon Linux | 1 | i686 | mod24_auth_mellon | < 0.14.0-2.8.amzn1 | mod24_auth_mellon-0.14.0-2.8.amzn1.i686.rpm |
Amazon Linux | 1 | x86_64 | mod24_auth_mellon-diagnostics | < 0.14.0-2.8.amzn1 | mod24_auth_mellon-diagnostics-0.14.0-2.8.amzn1.x86_64.rpm |
Amazon Linux | 1 | x86_64 | mod24_auth_mellon-debuginfo | < 0.14.0-2.8.amzn1 | mod24_auth_mellon-debuginfo-0.14.0-2.8.amzn1.x86_64.rpm |
Amazon Linux | 1 | x86_64 | mod24_auth_mellon | < 0.14.0-2.8.amzn1 | mod24_auth_mellon-0.14.0-2.8.amzn1.x86_64.rpm |
6.8 Medium
CVSS2
Attack Vector
NETWORK
Attack Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
AV:N/AC:M/Au:N/C:P/I:P/A:P
8.1 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
0.018 Low
EPSS
Percentile
88.1%