Amazon Linux AMI update for mod24_auth_mellon



Published: 2019-05-06
Risk Medium
Patch available YES
Number of vulnerabilities 2
CVE-ID CVE-2019-3878
CVE-2019-3877
CWE-ID CWE-287
CWE-601
Exploitation vector Network
Public exploit N/A
Vulnerable software
Subscribe 		Amazon Linux AMI
Operating systems & Components / Operating system

Vendor Amazon Web Services

Security Bulletin

This security bulletin contains information about 2 vulnerabilities.

1) Improper Authentication

EUVDB-ID: #VU18091

Risk: Medium

CVSSv3.1: 6.4 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:U/RL:O/RC:C]

CVE-ID: CVE-2019-3878

CWE-ID: CWE-287 - Improper Authentication

Exploit availability: No

Description

The vulnerability allows a remote attacker to bypass authentication process.

The vulnerability exists due to an error when processing certain headers. A remote attacker can add special HTTP headers that are normally used to start the special SAML ECP, bypass authentication process and gain unauthorized access to the application.

Successful exploitation of the vulnerability requires that Apache is configured as a reverse proxy and mod_auth_mellon is configured to only let through authenticated users.

Mitigation

Update the affected 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

Vulnerable software versions

Amazon Linux AMI: All versions

External links

http://alas.aws.amazon.com/ALAS-2019-1200.html


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

2) Open redirect

EUVDB-ID: #VU18090

Risk: Low

CVSSv3.1: 3.8 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2019-3877

CWE-ID: CWE-601 - URL Redirection to Untrusted Site ('Open Redirect')

Exploit availability: No

Description

The vulnerability allows a remote attacker to redirect victims to arbitrary URL.

The vulnerability exists due to improper sanitization of user-supplied data in the apr_uri_parse() function within the logout URL. A remote attacker can create a link that leads to a trusted website, however, when clicked, redirects the victim to arbitrary domain.

Successful exploitation of this vulnerability may allow a remote attacker to perform a phishing attack and steal potentially sensitive information.

Mitigation

Update the affected 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

Vulnerable software versions

Amazon Linux AMI: All versions

External links

http://alas.aws.amazon.com/ALAS-2019-1200.html


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.



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