Multiple vulnerabilities in Red Hat OpenShift Container Platform 4.8

1) Inconsistent interpretation of HTTP requests

EUVDB-ID: #VU56401

Risk: Medium

CVSSv3.1: 6.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N/E:P/RL:O/RC:C]

CVE-ID: CVE-2021-40346

CWE-ID: CWE-444 - Inconsistent Interpretation of HTTP Requests ('HTTP Request Smuggling')

Exploit availability: Yes

Description

The vulnerability allows a remote attacker to preform HTTP request smuggling attacks.

The vulnerability exists due to improper validation of HTTP/2 requests within the htx_add_header() and htx_add_trailer() functions when processing HTTP header name length encoding in the HTX representation. A remote attacker can send a specially crafted HTTP request to the server and smuggle HTTP headers.

Successful exploitation of vulnerability may allow an attacker to poison HTTP cache and perform phishing attacks.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Red Hat OpenShift Container Platform: 4.8.0 - 4.8.24

openshift-kuryr (Red Hat package): 4.8.0-202106281541.p0.git.8a4c2d8.assembly.stream.el8 - 4.8.0-202111221627.p0.g43dd2f6.assembly.stream.el8

openshift (Red Hat package): 4.8.0-202107161820.p0.git.051ac4f.assembly.stream.el7 - 4.8.0-202111221934.p0.g81bc627.assembly.stream.el8

ostree (Red Hat package): 2020.7-5.el8_4

haproxy (Red Hat package): 2.2.13-1.el7 - 2.2.13-1.el8

External links

http://access.redhat.com/errata/RHSA-2021:5208

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. However, proof of concept for this vulnerability is available.

2) Input validation error

EUVDB-ID: #VU55969

Risk: Medium

CVSSv3.1: 5.7 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-39240

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

The vulnerability allows a remote attacker to bypass security restrictions.

The vulnerability exists due to insufficient validation of user-supplied input when processing HTTP/2 requests. HAProxy does not ensure that the scheme and path portions of a URI have the expected characters, e.g. the authority field on a target HTTP/2 server might differ from what the routing rules were intended to achieve. A remote attacker can send specially crafted input to the application and bypass implemented security restrictions.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Red Hat OpenShift Container Platform: 4.8.0 - 4.8.24

openshift-kuryr (Red Hat package): 4.8.0-202106281541.p0.git.8a4c2d8.assembly.stream.el8 - 4.8.0-202111221627.p0.g43dd2f6.assembly.stream.el8

openshift (Red Hat package): 4.8.0-202107161820.p0.git.051ac4f.assembly.stream.el7 - 4.8.0-202111221934.p0.g81bc627.assembly.stream.el8

ostree (Red Hat package): 2020.7-5.el8_4

haproxy (Red Hat package): 2.2.13-1.el7 - 2.2.13-1.el8

External links

http://access.redhat.com/errata/RHSA-2021:5208

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) Input validation error

EUVDB-ID: #VU55970

Risk: Medium

CVSSv3.1: 5.7 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-39241

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

The vulnerability allows a remote attacker to bypass implemented security restrictions.

The vulnerability exists due to insufficient validation of user-supplied input in HAProxy.  An HTTP method name may contain a space followed by the name of a protected resource. It is possible that a server would interpret this as a request for that protected resource, such as in the "GET /admin? HTTP/1.1 /static/images HTTP/1.1" example.

The attacker can abuse such behavior to bypass implemented security restrictions and perform unauthorized actions against the web application behind the HAProxy.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Red Hat OpenShift Container Platform: 4.8.0 - 4.8.24

openshift-kuryr (Red Hat package): 4.8.0-202106281541.p0.git.8a4c2d8.assembly.stream.el8 - 4.8.0-202111221627.p0.g43dd2f6.assembly.stream.el8

openshift (Red Hat package): 4.8.0-202107161820.p0.git.051ac4f.assembly.stream.el7 - 4.8.0-202111221934.p0.g81bc627.assembly.stream.el8

ostree (Red Hat package): 2020.7-5.el8_4

haproxy (Red Hat package): 2.2.13-1.el7 - 2.2.13-1.el8

External links

http://access.redhat.com/errata/RHSA-2021:5208

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) Input validation error

EUVDB-ID: #VU55971

Risk: Medium

CVSSv3.1: 5.7 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-39242

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

The vulnerability allows a remote attacker to bypass implemented security restrictions.

The vulnerability exists due to insufficient validation of user-supplied input when processing HTTP headers. A remote attacker can send a specially crafted Host header to the application and bypass implemented security restrictions.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Red Hat OpenShift Container Platform: 4.8.0 - 4.8.24

openshift-kuryr (Red Hat package): 4.8.0-202106281541.p0.git.8a4c2d8.assembly.stream.el8 - 4.8.0-202111221627.p0.g43dd2f6.assembly.stream.el8

openshift (Red Hat package): 4.8.0-202107161820.p0.git.051ac4f.assembly.stream.el7 - 4.8.0-202111221934.p0.g81bc627.assembly.stream.el8

ostree (Red Hat package): 2020.7-5.el8_4

haproxy (Red Hat package): 2.2.13-1.el7 - 2.2.13-1.el8

External links

http://access.redhat.com/errata/RHSA-2021:5208

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.