SUSE update for apache2
| Risk | Medium |
| Patch available | YES |
| Number of vulnerabilities | 1 |
| CVE-ID | CVE-2021-33193 |
| CWE-ID | CWE-444 |
| Exploitation vector | Network |
| Public exploit | N/A |
| Vulnerable software |
SUSE Linux Enterprise Software Development Kit Operating systems & Components / Operating system SUSE Linux Enterprise Server Operating systems & Components / Operating system apache2-doc Operating systems & Components / Operating system package or component apache2-worker-debuginfo Operating systems & Components / Operating system package or component apache2-worker Operating systems & Components / Operating system package or component apache2-utils-debuginfo Operating systems & Components / Operating system package or component apache2-utils Operating systems & Components / Operating system package or component apache2-prefork-debuginfo Operating systems & Components / Operating system package or component apache2-prefork Operating systems & Components / Operating system package or component apache2-example-pages Operating systems & Components / Operating system package or component apache2 Operating systems & Components / Operating system package or component apache2-devel Operating systems & Components / Operating system package or component apache2-debugsource Operating systems & Components / Operating system package or component apache2-debuginfo Operating systems & Components / Operating system package or component |
| Vendor | SUSE |
Security Bulletin
This security bulletin contains one medium risk vulnerability.
1) Inconsistent interpretation of HTTP requests
EUVDB-ID: #VU56474
Risk: Medium
CVSSv4.0: 2.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Green]
CVE-ID: CVE-2021-33193
CWE-ID:
CWE-444 - Inconsistent Interpretation of HTTP Requests ('HTTP Request Smuggling')
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to preform HTTP/2 request smuggling attacks.
The vulnerability exists due to improper validation of HTTP/2 requests in mod_proxy in Apache HTTP Server. A remote attacker can send a specially crafted HTTP/2 request to the server and smuggle arbitrary HTTP headers.
Successful exploitation of vulnerability may allow an attacker to poison web server cache and perform phishing attacks.
MitigationUpdate the affected package apache2 to the latest version.
Vulnerable software versionsSUSE Linux Enterprise Software Development Kit: 12-SP5
SUSE Linux Enterprise Server: 12-SP5
apache2-doc: before 2.4.23-29.77.2
apache2-worker-debuginfo: before 2.4.23-29.77.2
apache2-worker: before 2.4.23-29.77.2
apache2-utils-debuginfo: before 2.4.23-29.77.2
apache2-utils: before 2.4.23-29.77.2
apache2-prefork-debuginfo: before 2.4.23-29.77.2
apache2-prefork: before 2.4.23-29.77.2
apache2-example-pages: before 2.4.23-29.77.2
apache2: before 2.4.23-29.77.2
apache2-devel: before 2.4.23-29.77.2
apache2-debugsource: before 2.4.23-29.77.2
apache2-debuginfo: before 2.4.23-29.77.2
CPE2.3- cpe:2.3:o:suse:suse_linux_enterprise_software_development_kit:12-SP5:*:*:*:*:*:*:*
- cpe:2.3:o:suse:suse_linux_enterprise_server:12-SP5:*:*:*:*:*:*:*
- cpe:2.3:a:suse:apache2-doc:*:*:*:*:*:suse_linux:*:*
- cpe:2.3:a:suse:apache2-worker-debuginfo:*:*:*:*:*:suse_linux:*:*
- cpe:2.3:a:suse:apache2-worker:*:*:*:*:*:suse_linux:*:*
- cpe:2.3:a:suse:apache2-utils-debuginfo:*:*:*:*:*:suse_linux:*:*
- cpe:2.3:a:suse:apache2-utils:*:*:*:*:*:suse_linux:*:*
- cpe:2.3:a:suse:apache2-prefork-debuginfo:*:*:*:*:*:suse_linux:*:*
- cpe:2.3:a:suse:apache2-prefork:*:*:*:*:*:suse_linux:*:*
- cpe:2.3:a:suse:apache2-example-pages:*:*:*:*:*:suse_linux:*:*
- cpe:2.3:a:suse:apache2:*:*:*:*:*:suse_linux:*:*
- cpe:2.3:a:suse:apache2-devel:*:*:*:*:*:suse_linux:*:*
- cpe:2.3:a:suse:apache2-debugsource:*:*:*:*:*:suse_linux:*:*
- cpe:2.3:a:suse:apache2-debuginfo:*:*:*:*:*:suse_linux:*:*
https://www.suse.com/support/update/announcement/2021/suse-su-20212918-1/
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.
