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National Vulnerability Database

National Vulnerability Database

NVD

National Vulnerability Database
  1. Vulnerabilities

CVE-2021-3489 Detail

Description

The eBPF RINGBUF bpf_ringbuf_reserve() function in the Linux kernel did not check that the allocated size was smaller than the ringbuf size, allowing an attacker to perform out-of-bounds writes within the kernel and therefore, arbitrary code execution. This issue was fixed via commit 4b81ccebaeee ("bpf, ringbuf: Deny reserve of buffers larger than ringbuf") (v5.13-rc4) and backported to the stable kernels in v5.12.4, v5.11.21, and v5.10.37. It was introduced via 457f44363a88 ("bpf: Implement BPF ring buffer and verifier support for it") (v5.8-rc1).


Metrics

 
NVD enrichment efforts reference publicly available information to associate vector strings. CVSS information contributed by other sources is also displayed.
CVSS 4.0 Severity and Vector Strings:

NIST CVSS score
NIST: NVD
N/A
NVD assessment not yet provided.

References to Advisories, Solutions, and Tools

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Hyperlink Resource
https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf.git/commit/?id=4b81ccebaeee885ab1aa1438133f2991e3a2b6ea Patch  Vendor Advisory 
https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf.git/commit/?id=4b81ccebaeee885ab1aa1438133f2991e3a2b6ea Patch  Vendor Advisory 
https://security.netapp.com/advisory/ntap-20210716-0004/ Third Party Advisory 
https://security.netapp.com/advisory/ntap-20210716-0004/ Third Party Advisory 
https://ubuntu.com/security/notices/USN-4949-1 Third Party Advisory 
https://ubuntu.com/security/notices/USN-4949-1 Third Party Advisory 
https://ubuntu.com/security/notices/USN-4950-1 Third Party Advisory 
https://ubuntu.com/security/notices/USN-4950-1 Third Party Advisory 
https://www.openwall.com/lists/oss-security/2021/05/11/10 Mailing List  Third Party Advisory 
https://www.openwall.com/lists/oss-security/2021/05/11/10 Mailing List  Third Party Advisory 
https://www.zerodayinitiative.com/advisories/ZDI-21-590/ Third Party Advisory  VDB Entry 
https://www.zerodayinitiative.com/advisories/ZDI-21-590/ Third Party Advisory  VDB Entry 

Weakness Enumeration

CWE-ID CWE Name Source
CWE-787 Out-of-bounds Write cwe source acceptance level NIST   Canonical Ltd.  
CWE-119 Improper Restriction of Operations within the Bounds of a Memory Buffer Canonical Ltd.  

Known Affected Software Configurations Switch to CPE 2.2

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Change History

6 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2021-3489
NVD Published Date:
06/03/2021
NVD Last Modified:
11/21/2024
Source:
Canonical Ltd.