SUSE update for apache2-mod_auth_openidc



Risk Medium
Patch available YES
Number of vulnerabilities 5
CVE-ID CVE-2021-32785
CVE-2021-32786
CVE-2021-32791
CVE-2021-32792
CVE-2021-39191
CWE-ID CWE-134
CWE-601
CWE-330
CWE-79
Exploitation vector Network
Public exploit N/A
Vulnerable software
 SUSE Linux Enterprise Server
Operating systems & Components / Operating system

apache2-mod_auth_openidc-debugsource
Operating systems & Components / Operating system package or component

apache2-mod_auth_openidc-debuginfo
Operating systems & Components / Operating system package or component

apache2-mod_auth_openidc
Operating systems & Components / Operating system package or component

Vendor SUSE

Security Bulletin

This security bulletin contains information about 5 vulnerabilities.

1) Format string error

EUVDB-ID: #VU79695

Risk: Medium

CVSSv4.0: 6.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2021-32785

CWE-ID: CWE-134 - Use of Externally-Controlled Format String

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to a format string error as mod_auth_openidc wrongly performs argument interpolation before passing Redis requests to `hiredis. A remote attacker can supply a specially crafted input that contains format string specifiers and perform a denial of service (DoS) attack.

Mitigation

Update the affected package apache2-mod_auth_openidc to the latest version.

Vulnerable software versions

SUSE Linux Enterprise Server: 12-SP5

apache2-mod_auth_openidc-debugsource: before 2.4.0-3.23.1

apache2-mod_auth_openidc-debuginfo: before 2.4.0-3.23.1

apache2-mod_auth_openidc: before 2.4.0-3.23.1

CPE2.3 External links

https://www.suse.com/support/update/announcement/2021/suse-su-20213352-1/


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: #VU79693

Risk: Low

CVSSv4.0: 0.5 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2021-32786

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 oidc_validate_redirect_url() function. 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 package apache2-mod_auth_openidc to the latest version.

Vulnerable software versions

SUSE Linux Enterprise Server: 12-SP5

apache2-mod_auth_openidc-debugsource: before 2.4.0-3.23.1

apache2-mod_auth_openidc-debuginfo: before 2.4.0-3.23.1

apache2-mod_auth_openidc: before 2.4.0-3.23.1

CPE2.3 External links

https://www.suse.com/support/update/announcement/2021/suse-su-20213352-1/


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.

3) Use of insufficiently random values

EUVDB-ID: #VU79694

Risk: Low

CVSSv4.0: 1.7 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2021-32791

CWE-ID: CWE-330 - Use of Insufficiently Random Values

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform a brute-force attack.

The vulnerability exists due to the AES GCM encryption in mod_auth_openidc uses a static IV and AAD, which creates a static nonce. Since aes-gcm is a stream cipher, this can lead to known cryptographic issues as the same key is being reused.

Mitigation

Update the affected package apache2-mod_auth_openidc to the latest version.

Vulnerable software versions

SUSE Linux Enterprise Server: 12-SP5

apache2-mod_auth_openidc-debugsource: before 2.4.0-3.23.1

apache2-mod_auth_openidc-debuginfo: before 2.4.0-3.23.1

apache2-mod_auth_openidc: before 2.4.0-3.23.1

CPE2.3 External links

https://www.suse.com/support/update/announcement/2021/suse-su-20213352-1/


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.

4) Cross-site scripting

EUVDB-ID: #VU55291

Risk: Low

CVSSv4.0: 1.2 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N/E:U/U:Clear]

CVE-ID: CVE-2021-32792

CWE-ID: CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Exploit availability: No

Description

The disclosed vulnerability allows a remote attacker to perform cross-site scripting (XSS) attacks.

The vulnerability exists due to insufficient sanitization of user-supplied data within the "OIDCPreservePost On". A remote attacker can trick the victim to follow a specially crafted link and execute arbitrary HTML and script code in user's browser in context of vulnerable website.

Successful exploitation of this vulnerability may allow a remote attacker to steal potentially sensitive information, change appearance of the web page, perform phishing and drive-by-download attacks.

Mitigation

Update the affected package apache2-mod_auth_openidc to the latest version.

Vulnerable software versions

SUSE Linux Enterprise Server: 12-SP5

apache2-mod_auth_openidc-debugsource: before 2.4.0-3.23.1

apache2-mod_auth_openidc-debuginfo: before 2.4.0-3.23.1

apache2-mod_auth_openidc: before 2.4.0-3.23.1

CPE2.3 External links

https://www.suse.com/support/update/announcement/2021/suse-su-20213352-1/


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.

5) Open redirect

EUVDB-ID: #VU71703

Risk: Low

CVSSv4.0: 0.5 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2021-39191

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. 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 package apache2-mod_auth_openidc to the latest version.

Vulnerable software versions

SUSE Linux Enterprise Server: 12-SP5

apache2-mod_auth_openidc-debugsource: before 2.4.0-3.23.1

apache2-mod_auth_openidc-debuginfo: before 2.4.0-3.23.1

apache2-mod_auth_openidc: before 2.4.0-3.23.1

CPE2.3 External links

https://www.suse.com/support/update/announcement/2021/suse-su-20213352-1/


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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