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).
References
Link | Resource |
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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://ubuntu.com/security/notices/USN-4949-1 | 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.zerodayinitiative.com/advisories/ZDI-21-590/ | Third Party Advisory VDB Entry |
Configurations
Configuration 1 (hide)
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Configuration 2 (hide)
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History
14 Sep 2021, 14:30
Type | Values Removed | Values Added |
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References |
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14 Jun 2021, 16:20
Type | Values Removed | Values Added |
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CVSS |
v2 : v3 : |
v2 : 7.2
v3 : 7.8 |
11 Jun 2021, 18:03
Type | Values Removed | Values Added |
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CPE | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:5.13:rc3:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:5.13:-:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:5.13:rc2:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:5.13:rc1:*:*:*:*:*:* cpe:2.3:o:canonical:ubuntu_linux:20.10:*:*:*:*:*:*:* cpe:2.3:o:canonical:ubuntu_linux:20.04:*:*:*:lts:*:*:* cpe:2.3:o:canonical:ubuntu_linux:21.04:*:*:*:*:*:*:* |
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References | (MISC) https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf.git/commit/?id=4b81ccebaeee885ab1aa1438133f2991e3a2b6ea - Patch, Vendor Advisory | |
References | (MISC) https://www.zerodayinitiative.com/advisories/ZDI-21-590/ - Third Party Advisory, VDB Entry | |
References | (UBUNTU) https://ubuntu.com/security/notices/USN-4949-1 - Third Party Advisory | |
References | (MLIST) https://www.openwall.com/lists/oss-security/2021/05/11/10 - Mailing List, Third Party Advisory | |
References | (UBUNTU) https://ubuntu.com/security/notices/USN-4950-1 - Third Party Advisory | |
CWE | CWE-787 | |
CVSS |
v2 : v3 : |
v2 : 7.2
v3 : 8.8 |
04 Jun 2021, 02:15
Type | Values Removed | Values Added |
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New CVE |
Information
Published : 2021-06-04 02:15
Updated : 2023-12-10 13:55
NVD link : CVE-2021-3489
Mitre link : CVE-2021-3489
CVE.ORG link : CVE-2021-3489
JSON object : View
Products Affected
linux
- linux_kernel
canonical
- ubuntu_linux