HTTP request smuggling in SAP Web Dispatcher and Internet Communication Manager (ICM)
| Risk | Medium |
| Patch available | YES |
| Number of vulnerabilities | 1 |
| CVE-ID | CVE-2021-33683 |
| CWE-ID | CWE-444 |
| Exploitation vector | Network |
| Public exploit | N/A |
| Vulnerable software |
SAP Web Dispatcher Kernel Server applications / Application servers SAP Web Dispatcher WEBDISP Server applications / Other server solutions Internet Communication Manager (ICM) KRNL32UC Server applications / Other server solutions Internet Communication Manager (ICM) KRNL64UC Server applications / Other server solutions Internet Communication Manager (ICM) KRNL64NUC Server applications / Other server solutions Internet Communication Manager (ICM) KRNL32NUC Universal components / Libraries / Libraries used by multiple products |
| Vendor | SAP |
Security Bulletin
This security bulletin contains one medium risk vulnerability.
1) Inconsistent interpretation of HTTP requests
EUVDB-ID: #VU75156
Risk: Medium
CVSSv4.0: 1.2 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Green]
CVE-ID: CVE-2021-33683
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 attacks.
The vulnerability exists due to improper validation of HTTP requests. A remote attacker can send a specially crafted HTTP request to the server and smuggle arbitrary HTTP headers.
Successful exploitation of vulnerability may allow an attacker to poison HTTP cache and perform phishing attacks.
MitigationInstall updates from vendor's website.
Vulnerable software versionsSAP Web Dispatcher Kernel: 7.21 - 7.83
SAP Web Dispatcher WEBDISP: 7.53 - 7.83
Internet Communication Manager (ICM) KRNL32UC: 7.21EXT - 7.22
Internet Communication Manager (ICM) KRNL64UC: 7.21EXT - 7.73
Internet Communication Manager (ICM) KRNL32NUC: 7.21EXT - 7.22
Internet Communication Manager (ICM) KRNL64NUC: 7.21EXT - 7.49
CPE2.3- cpe:2.3:a:sap:sap_web_dispatcher_kernel:7.21:*:*:*:*:*:*:*
- cpe:2.3:a:sap:sap_web_dispatcher_kernel:7.22:*:*:*:*:*:*:*
- cpe:2.3:a:sap:sap_web_dispatcher_kernel:7.49:*:*:*:*:*:*:*
- cpe:2.3:a:sap:sap_web_dispatcher_webdisp:7.53:*:*:*:*:*:*:*
- cpe:2.3:a:sap:sap_web_dispatcher_webdisp:7.73:*:*:*:*:*:*:*
- cpe:2.3:a:sap:sap_web_dispatcher_webdisp:7.77:*:*:*:*:*:*:*
- cpe:2.3:a:sap:internet_communication_manager_icm_krnl32uc:7.21EXT:*:*:*:*:sap_netweaver_as_abap:*:*
- cpe:2.3:a:sap:internet_communication_manager_icm_krnl32uc:7.21:*:*:*:*:sap_netweaver_as_abap:*:*
- cpe:2.3:a:sap:internet_communication_manager_icm_krnl32uc:7.22EXT:*:*:*:*:sap_netweaver_as_abap:*:*
- cpe:2.3:a:sap:internet_communication_manager_icm_krnl64uc:7.21EXT:*:*:*:*:sap_netweaver_as_abap:*:*
- cpe:2.3:a:sap:internet_communication_manager_icm_krnl32nuc:7.21EXT:*:*:*:*:sap_netweaver_as_abap:*:*
- cpe:2.3:a:sap:internet_communication_manager_icm_krnl64nuc:7.21EXT:*:*:*:*:sap_netweaver_as_abap:*:*
https://www.sap.com/documents/2022/02/fa865ea4-167e-0010-bca6-c68f7e60039b.html
https://launchpad.support.sap.com/#/notes/3000663
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.
