var-202106-1816
Vulnerability from variot

SAP NetWeaver AS for ABAP (RFC Gateway), versions - KRNL32NUC - 7.22,7.22EXT, KRNL64NUC - 7.22,7.22EXT,7.49, KRNL64UC - 8.04,7.22,7.22EXT,7.49,7.53,7.73, KERNEL - 7.22,8.04,7.49,7.53,7.73,7.77,7.81,7.82,7.83, allows an unauthenticated attacker without specific knowledge of the system to send a specially crafted packet over a network which will trigger an internal error in the system due to improper input validation in method memmove() causing the system to crash and rendering it unavailable. In this attack, no data in the system can be viewed or modified. SAP NetWeaver AS for ABAP (RFC Gateway) Is vulnerable to input validation.Denial of service (DoS) It may be put into a state. SAP NetWeaver AS ABAP Business Server is an application server suitable for ABAP (Advanced Business Application Programming) from SAP company in Germany.

SAP NetWeaver AS ABAP Business Server has a security vulnerability, which stems from a memory corruption vulnerability in NetWeaver ABAP Server and ABAP Platform. Attackers can use this vulnerability to use multiple vulnerabilities in SAP products.

Advisory Information

  • Public Release Date: 11/22/2021
  • Security Advisory ID: ONAPSIS-2021-0018
  • Researcher(s): Yvan Genuer

Vulnerability Information

  • Vendor: SAP
  • Affected Components: All SAP kernel 32 and 64 bits, unicode and no-unicode
  • SAP KERNEL 7.22
  • SAP KERNEL 7.22EXT
  • SAP KERNEL 7.49
  • SAP KERNEL 7.53
  • SAP KERNEL 7.73
  • SAP KERNEL 7.77
  • SAP KERNEL 7.81
  • SAP KERNEL 8.04

(Check SAP Note 3020209 for detailed information on affected releases)

  • Vulnerability Class: CWE-20, CWE-125, CWE-476
  • CVSS v3 score: 7.5 AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
  • Risk Level: High
  • Assigned CVE: CVE-2021-27597 CVE-2021-27633 CVE-2021-27634
  • Vendor patch Information: SAP Security NOTE 3020209

Affected Components Description

The SAP Gateway server is the component that manages the communication between SAP system and the rest of the world. This is a mandatory service for SAP Netweaver system, whitout it any background communication to the system is not possible, make the system useless. The source pointer is calculated partially with attacker controlled inputs. When this GW_REQ* pointer’s is used again in GwSearchConn(), to get another offset, it leads to unattended behavior or crash. An attacker can craft a malicious RFC packet to reach a particular part of function ThrtHdlAppc(), where inputs, after a few modifications, are sent to disp+work with ThSAPCMSEND(). Leading it to crash in ThCPIC(). In normal workload, RFC requests received by the gwrd are forwarded to a work process type DIA to perform an ABAP task. These requests are stored in pendingRequests part in memory. An attacker can craft a valid RFC packet and force the service to store malicious entry in pendingRequests aera. Leading the disp+work to crash.

Solution

SAP has released SAP Note 3020209 which provide patched versions of the affected components.

The patches can be downloaded from https://launchpad.support.sap.com/#/notes/3020209.

Onapsis strongly recommends SAP customers to download the related security fixes and apply them to the affected components in order to reduce business risks.

Report Timeline

  • MM-DD-YYYY:
  • 02/01/2021: Onapsis sends details to SAP
  • 02/04/2021: SAP provides internal ID
  • 02/08/2021: SAP confirms CVSS
  • 06/09/2021: SAP releases SAP Note fixing the issue.
  • 11/22/2021: Advisory published

References

  • Onapsis blogpost: https://www.onapsis.com/blog/sap-security-patch-day-june-2021-multiple-memory-corruption-vulnerabilities-can-lead-system
  • CVE Mitre: https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-27597 https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-27633 https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-27634
  • Vendor Patch: https://launchpad.support.sap.com/#/notes/3020209

About Onapsis Research Labs

Onapsis Research Labs provides the industry analysis of key security issues that impact business-critical systems and applications. Delivering frequent and timely security and compliance advisories with associated risk levels, Onapsis Research Labs combine in-depth knowledge and experience to deliver technical and business-context with sound security judgment to the broader information security community.

Find all reported vulnerabilities at https://github.com/Onapsis/vulnerability_advisories

About Onapsis, Inc.

Onapsis protects the mission-critical applications that run the global economy, from the core to the cloud. The Onapsis Platform uniquely delivers actionable insight, secure change, automated governance and continuous monitoring for critical systems—ERP, CRM, PLM, HCM, SCM and BI applications—from leading vendors such as SAP, Oracle, Salesforce and others, while keeping them protected and compliant.

For more information, connect with us on Twitter or LinkedIn, or visit us at https://www.onapsis.com.

License

This advisory is licensed under a Creative Commons 4.0 BY-ND International License

-- This email and any files transmitted with it are confidential and intended solely for the use of the individual or entity to whom they are addressed. If you have received this email in error please notify the system manager. This message contains confidential information and is intended only for the individual named. If you are not the named addressee you should not disseminate, distribute or copy this e-mail. Please notify the sender immediately by e-mail if you have received this e-mail by mistake and delete this e-mail from your system. If you are not the intended recipient you are notified that disclosing, copying, distributing or taking any action in reliance on the contents of this information is strictly prohibited

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    "data": "SAP NetWeaver AS for ABAP (RFC Gateway), versions - KRNL32NUC - 7.22,7.22EXT, KRNL64NUC - 7.22,7.22EXT,7.49, KRNL64UC - 8.04,7.22,7.22EXT,7.49,7.53,7.73, KERNEL - 7.22,8.04,7.49,7.53,7.73,7.77,7.81,7.82,7.83, allows an unauthenticated attacker without specific knowledge of the system to send a specially crafted packet over a network which will trigger an internal error in the system due to improper input validation in method memmove() causing the system to crash and rendering it unavailable. In this attack, no data in the system can be viewed or modified. SAP NetWeaver AS for ABAP (RFC Gateway) Is vulnerable to input validation.Denial of service  (DoS) It may be put into a state. SAP NetWeaver AS ABAP Business Server is an application server suitable for ABAP (Advanced Business Application Programming) from SAP company in Germany. \n\r\n\r\nSAP NetWeaver AS ABAP Business Server has a security vulnerability, which stems from a memory corruption vulnerability in NetWeaver ABAP Server and ABAP Platform. Attackers can use this vulnerability to use multiple vulnerabilities in SAP products. \n\n\n## Advisory Information\n\n- Public Release Date: 11/22/2021\n- Security Advisory ID: ONAPSIS-2021-0018\n- Researcher(s): Yvan Genuer\n\n\n## Vulnerability Information\n\n- Vendor: SAP\n- Affected Components: All SAP kernel 32 and 64 bits, unicode and no-unicode\n  - SAP KERNEL 7.22\n  - SAP KERNEL 7.22EXT\n  - SAP KERNEL 7.49\n  - SAP KERNEL 7.53\n  - SAP KERNEL 7.73\n  - SAP KERNEL 7.77\n  - SAP KERNEL 7.81\n  - SAP KERNEL 8.04\n\n  (Check SAP Note 3020209 for detailed information on affected releases)\n\n- Vulnerability Class: CWE-20, CWE-125, CWE-476\n- CVSS v3 score: 7.5 AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H\n- Risk Level: High\n- Assigned CVE:\n  CVE-2021-27597\n  CVE-2021-27633\n  CVE-2021-27634\n- Vendor patch Information: SAP Security NOTE 3020209\n\n\n## Affected Components Description\n\nThe SAP Gateway server is the component that manages the communication\nbetween\nSAP system and the rest of the world. This is a mandatory service for SAP\nNetweaver system, whitout it any background communication to the system is\nnot\npossible, make the system useless. The source\npointer is calculated partially with attacker controlled inputs. When this\n`GW_REQ*` pointer\u2019s is used again in `GwSearchConn()`, to get another\noffset, it\nleads to unattended behavior or crash. An attacker can craft\na\nmalicious RFC packet to reach a particular part of function `ThrtHdlAppc()`,\nwhere inputs, after a few modifications, are sent to disp+work with\n`ThSAPCMSEND()`. Leading it to crash in `ThCPIC()`. In normal workload,\nRFC requests received by the gwrd are forwarded to a work process type DIA\nto\nperform an ABAP task. These requests are stored in `pendingRequests` part in\nmemory. An attacker can craft a valid RFC packet and force the service to\nstore\nmalicious entry in `pendingRequests` aera. Leading the disp+work to crash. \n\n\n## Solution\n\nSAP has released SAP Note 3020209 which provide patched versions of the\naffected components. \n\nThe patches can be downloaded from\nhttps://launchpad.support.sap.com/#/notes/3020209. \n\nOnapsis strongly recommends SAP customers to download the related\nsecurity fixes and apply them to the affected components in order to\nreduce business risks. \n\n\n## Report Timeline\n\n - MM-DD-YYYY:\n - 02/01/2021: Onapsis sends details to SAP\n - 02/04/2021: SAP provides internal ID\n - 02/08/2021: SAP confirms CVSS\n - 06/09/2021: SAP releases SAP Note fixing the issue. \n - 11/22/2021: Advisory published\n\n## References\n\n- Onapsis blogpost:\nhttps://www.onapsis.com/blog/sap-security-patch-day-june-2021-multiple-memory-corruption-vulnerabilities-can-lead-system\n- CVE Mitre:\nhttps://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-27597\nhttps://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-27633\nhttps://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-27634\n- Vendor Patch:\nhttps://launchpad.support.sap.com/#/notes/3020209\n\n\n## About Onapsis Research Labs\n\nOnapsis Research Labs provides the industry analysis of key security\nissues that impact business-critical systems and applications. \nDelivering frequent and timely security and compliance advisories with\nassociated risk levels, Onapsis Research Labs combine in-depth knowledge\nand experience to deliver technical and business-context with sound\nsecurity judgment to the broader information security community. \n\nFind all reported vulnerabilities at\nhttps://github.com/Onapsis/vulnerability_advisories\n\n\n## About Onapsis, Inc. \n\nOnapsis protects the mission-critical applications that run the global\neconomy,\nfrom the core to the cloud. The Onapsis Platform uniquely delivers\nactionable\ninsight, secure change, automated governance and continuous monitoring for\ncritical\nsystems\u2014ERP, CRM, PLM, HCM, SCM and BI applications\u2014from leading vendors\nsuch as SAP,\nOracle, Salesforce and others, while keeping them protected and compliant. \n\nFor more information, connect with us on Twitter or LinkedIn, or visit us at\nhttps://www.onapsis.com. \n\n\n## License\nThis advisory is licensed under a [Creative Commons 4.0 BY-ND International\nLicense](https://creativecommons.org/licenses/by-nd/4.0/legalcode)\n\u003cbr\u003e\u003cbr\u003e\u003cimg src=\"../../images/license_cc.png\" align=\"left\" height=\"36\"\nwidth=\"112\" \u003e\n\n-- \nThis email and any files transmitted with it are confidential and intended \nsolely for the use of the individual or entity to whom they are addressed. \nIf you have received this email in error please notify the system manager. \nThis message contains confidential information and is intended only for the \nindividual named. If you are not the named addressee you should not \ndisseminate, distribute or copy this e-mail. \nPlease notify the sender \nimmediately by e-mail if you have received this e-mail by mistake and \ndelete this e-mail from your system. If you are not the intended recipient \nyou are notified that disclosing, copying, distributing or taking any \naction in reliance on the contents of this information is strictly \nprohibited",
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