Buffer overflow in SAP Netweaver Abap
CVE-2021-27634
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 ThCpicDtCreate () causing the system to crash and rendering it unavailable. In this attack, no data in the system can be viewed or modified.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.9 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.013 (69.9th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 70th percentile — 69.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.013 · newest: 0.013 · change: 0.000
Affected products
- SAP Netweaver Abap — versions kernel_7.22, kernel_7.49, kernel_7.53
- SAP Se Netweaver As For Abap (Rfc Gateway) — versions < KRNL32NUC - 7.22, < 7.22EXT, < KRNL64NUC - 7.22
Weakness classification (CWE)
Public proof-of-concept exploits
References
- wiki.scn.sap.com/wiki/pages/viewpage.action (Broken Link, Vendor Advisory)
- launchpad.support.sap.com/ (Permissions Required, Vendor Advisory)
Frequently asked questions
- What is CVE-2021-27634?
- CVE-2021-27634 is a medium-severity vulnerability in SAP Netweaver Abap, classified under Out-of-bounds Write. CVSS score: 5.9/10. Published 2021-06-09.
- How severe is CVE-2021-27634?
- Medium severity. CVSS v3 base score is 5.9 out of 10.
- Is CVE-2021-27634 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.