Red Hat update for OpenShift Container Platform 4.4.3 haproxy
| Risk | High |
| Patch available | YES |
| Number of vulnerabilities | 3 |
| CVE-ID | CVE-2019-18277 CVE-2019-19330 CVE-2020-11100 |
| CWE-ID | CWE-444 CWE-93 CWE-122 |
| Exploitation vector | Network |
| Public exploit | N/A |
| Vulnerable software Subscribe |
Red Hat OpenShift Container Platform Client/Desktop applications / Software for system administration haproxy (Red Hat package) Operating systems & Components / Operating system package or component |
| Vendor | Red Hat Inc. |
Security Bulletin
This security bulletin contains information about 3 vulnerabilities.
1) Inconsistent interpretation of HTTP requests
EUVDB-ID: #VU22597
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-2019-18277
CWE-ID:
CWE-444 - Inconsistent Interpretation of HTTP Requests ('HTTP Request Smuggling')
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to perform HTTP request smuggling attack.
The vulnerability exists due to incorrect processing of messages with a missing transfer-encoding header, when HAProxy is configured in legacy mode. The server does not reject "chunked" value that combined with the "http-reuse always" setting can lead to HTTP request smuggling attack.
Install updates from vendor's website.
Red Hat OpenShift Container Platform: 4.4.0 - 4.4.2
haproxy (Red Hat package): 1.8.23-3.el7 - 1.8.23-3.el8
CPE2.3- cpe:2.3:a:red_hat:red_hat_openshift_container_platform:4.4.2:*:*:*:*:*:*:
- cpe:2.3:o:red_hat:haproxy_redhat_package:1.8.23-3.el8:*:*:*:*:red_hat_enterprise_linux:*:
- cpe:2.3:o:red_hat:haproxy_redhat_package:1.8.23-3.el7:*:*:*:*:red_hat_enterprise_linux:*:
http://access.redhat.com/errata/RHSA-2020:1936
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) CRLF injection
EUVDB-ID: #VU23084
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-2019-19330
CWE-ID:
CWE-93 - Improper Neutralization of CRLF Sequences ('CRLF Injection')
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to perform spoofing attack.
The vulnerability exists due to insufficient validation of user-supplied input when processing CRLF and NUL character in the HTTP request, while converting headers from HTTP/2 to
HTTP/1. A remote attacker can send a specially crafted HTTP/2 request to the HAProxy and inject arbitrary HTTP headers. Successful exploitation of the vulnerability may allow an attacker to bypass certain security restrictions or perform spoofing attacks.
Install updates from vendor's website.
Red Hat OpenShift Container Platform: 4.4.0 - 4.4.2
haproxy (Red Hat package): 1.8.23-3.el7 - 1.8.23-3.el8
CPE2.3- cpe:2.3:a:red_hat:red_hat_openshift_container_platform:4.4.2:*:*:*:*:*:*:
- cpe:2.3:o:red_hat:haproxy_redhat_package:1.8.23-3.el8:*:*:*:*:red_hat_enterprise_linux:*:
- cpe:2.3:o:red_hat:haproxy_redhat_package:1.8.23-3.el7:*:*:*:*:red_hat_enterprise_linux:*:
http://access.redhat.com/errata/RHSA-2020:1936
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) Heap-based buffer overflow
EUVDB-ID: #VU26549
Risk: High
CVSSv3.1: 8.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]
CVE-ID: CVE-2020-11100
CWE-ID:
CWE-122 - Heap-based Buffer Overflow
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to execute arbitrary code on the target system.
The vulnerability exists due to a boundary error when processing HTTP/2 requests within the hpack_dht_insert() function in hpack-tbl.c (HPACK decoder). A remote attacker can send a specially crafted HTTP/2 request to the affected HAProxy, trigger heap-based buffer overflow and execute arbitrary code on the target system.
Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.
MitigationInstall updates from vendor's website.
Red Hat OpenShift Container Platform: 4.4.0 - 4.4.2
haproxy (Red Hat package): 1.8.23-3.el7 - 1.8.23-3.el8
CPE2.3- cpe:2.3:a:red_hat:red_hat_openshift_container_platform:4.4.2:*:*:*:*:*:*:
- cpe:2.3:o:red_hat:haproxy_redhat_package:1.8.23-3.el8:*:*:*:*:red_hat_enterprise_linux:*:
- cpe:2.3:o:red_hat:haproxy_redhat_package:1.8.23-3.el7:*:*:*:*:red_hat_enterprise_linux:*:
http://access.redhat.com/errata/RHSA-2020:1936
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.
