Red Hat OpenStack Platform 16 update for etcd
| Risk | Medium |
| Patch available | YES |
| Number of vulnerabilities | 4 |
| CVE-ID | CVE-2021-31525 CVE-2021-33195 CVE-2021-33197 CVE-2021-33198 |
| CWE-ID | CWE-674 CWE-79 CWE-862 CWE-399 |
| Exploitation vector | Network |
| Public exploit | N/A |
| Vulnerable software |
Red Hat OpenStack for IBM Power Server applications / Other server solutions Red Hat OpenStack Server applications / Other server solutions etcd (Red Hat package) Operating systems & Components / Operating system package or component |
| Vendor | Red Hat Inc. |
Security Bulletin
This security bulletin contains information about 4 vulnerabilities.
1) Uncontrolled Recursion
EUVDB-ID: #VU54910
Risk: Medium
CVSSv4.0: 4.6 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]
CVE-ID: CVE-2021-31525
CWE-ID:
CWE-674 - Uncontrolled Recursion
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to perform a DoS attack.
The vulnerability exists due to uncontrolled recursion when processing HTTP headers. A remote attacker can send a large header to ReadRequest or ReadResponse and perform a denial of service (DoS) attack.
Install updates from vendor's website.
Red Hat OpenStack for IBM Power: 16.1
Red Hat OpenStack: 16.1
etcd (Red Hat package): before 3.3.23-3.1.el8ost.1
CPE2.3- cpe:2.3:a:red_hat:red_hat_openstack_for_ibm_power:16.1:*:*:*:*:*:*:*
- cpe:2.3:a:red_hat:red_hat_openstack:16.1:*:*:*:*:*:*:*
- cpe:2.3:a:red_hat:etcd_redhat_package:*:*:*:*:*:red_hat_enterprise_linux:*:*
https://access.redhat.com/errata/RHSA-2021:5072
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) Cross-site scripting
EUVDB-ID: #VU56022
Risk: Medium
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:Green]
CVE-ID: CVE-2021-33195
CWE-ID:
CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Exploit availability: No
DescriptionThe disclosed vulnerability allows a remote attacker to perform cross-site scripting (XSS) attacks.
The vulnerability exists due to insufficient sanitization of data passed from DNS lookups. A remote attacker can send a specially crafted DNS reqponse 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.
MitigationInstall updates from vendor's website.
Red Hat OpenStack for IBM Power: 16.1
Red Hat OpenStack: 16.1
etcd (Red Hat package): before 3.3.23-3.1.el8ost.1
CPE2.3- cpe:2.3:a:red_hat:red_hat_openstack_for_ibm_power:16.1:*:*:*:*:*:*:*
- cpe:2.3:a:red_hat:red_hat_openstack:16.1:*:*:*:*:*:*:*
- cpe:2.3:a:red_hat:etcd_redhat_package:*:*:*:*:*:red_hat_enterprise_linux:*:*
https://access.redhat.com/errata/RHSA-2021:5072
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) Missing Authorization
EUVDB-ID: #VU56023
Risk: Medium
CVSSv4.0: 2.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Green]
CVE-ID: CVE-2021-33197
CWE-ID:
CWE-862 - Missing Authorization
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to bypass authorization process.
The vulnerability exists due to an error in some configurations of ReverseProxy (from net/http/httputil). A remote attacker can drop arbitrary headers and bypass authorization process.
MitigationInstall updates from vendor's website.
Red Hat OpenStack for IBM Power: 16.1
Red Hat OpenStack: 16.1
etcd (Red Hat package): before 3.3.23-3.1.el8ost.1
CPE2.3- cpe:2.3:a:red_hat:red_hat_openstack_for_ibm_power:16.1:*:*:*:*:*:*:*
- cpe:2.3:a:red_hat:red_hat_openstack:16.1:*:*:*:*:*:*:*
- cpe:2.3:a:red_hat:etcd_redhat_package:*:*:*:*:*:red_hat_enterprise_linux:*:*
https://access.redhat.com/errata/RHSA-2021:5072
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) Resource management error
EUVDB-ID: #VU56024
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-2021-33198
CWE-ID:
CWE-399 - Resource Management Errors
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to improper management of internal resources within the application when handling a large exponent to the math/big.Rat SetString or UnmarshalText method. A remote attacker can pass specially crafted data to the application and perform a denial of service (DoS) attack.
MitigationInstall updates from vendor's website.
Red Hat OpenStack for IBM Power: 16.1
Red Hat OpenStack: 16.1
etcd (Red Hat package): before 3.3.23-3.1.el8ost.1
CPE2.3- cpe:2.3:a:red_hat:red_hat_openstack_for_ibm_power:16.1:*:*:*:*:*:*:*
- cpe:2.3:a:red_hat:red_hat_openstack:16.1:*:*:*:*:*:*:*
- cpe:2.3:a:red_hat:etcd_redhat_package:*:*:*:*:*:red_hat_enterprise_linux:*:*
https://access.redhat.com/errata/RHSA-2021:5072
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.
