CVE-2022-3534 - OpenCVE

A vulnerability classified as critical has been found in Linux Kernel. Affected is the function btf_dump_name_dups of the file tools/lib/bpf/btf_dump.c of the component libbpf. The manipulation leads to use after free. It is recommended to apply a patch to fix this issue. The identifier of this vulnerability is VDB-211032.

No CVSS v4.0

Attack Vector Adjacent Network

Attack Complexity Low

Privileges Required Low

Scope Unchanged

Confidentiality Impact Low

Integrity Impact Low

Availability Impact Low

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

Key SSVC decision points have not yet been added.

Vendors	Products
Linux	Linux Kernel

Configuration 1 [-]

cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:*

No data.

References

Link	Providers
https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next.git/commit/?id=93c660ca40b5d2f7c1b1626e955a8e9fa30e0749
https://nvd.nist.gov/vuln/detail/CVE-2022-3534
https://vuldb.com/?id.211032
https://www.cve.org/CVERecord?id=CVE-2022-3534

History

No history.

MITRE

Status: PUBLISHED

Assigner: VulDB

Published: 2022-10-17T00:00:00

Updated: 2024-08-03T01:14:02.420Z

Reserved: 2022-10-17T00:00:00

Link: CVE-2022-3534

Vulnrichment

No data.

NVD

Status : Modified

Published: 2022-10-17T09:15:12.750

Modified: 2023-11-07T03:51:22.997

Link: CVE-2022-3534

Redhat

Severity : Low

Publid Date: 2022-10-13T06:30:00Z

Links: CVE-2022-3534 - Bugzilla

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{"bugzilla": {"description": "Kernel: use-after-free in btf_dump_name_dups in tools/lib/bpf/btf_dump.c", "id": "2165706", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2165706"}, "csaw": false, "cvss3": {"cvss3_base_score": "4.3", "cvss3_scoring_vector": "CVSS:3.1/AV:A/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:L", "status": "draft"}, "cwe": "CWE-416", "details": ["A vulnerability classified as critical has been found in Linux Kernel. Affected is the function btf_dump_name_dups of the file tools/lib/bpf/btf_dump.c of the component libbpf. The manipulation leads to use after free. It is recommended to apply a patch to fix this issue. The identifier of this vulnerability is VDB-211032.", "A use-after-free flaw was found in btf_dump_name_dups in tools/lib/bpf/btf_dump.c in libbpf in the Linux Kernel. This issue occurs because the key stored in the hash table name_map is a string address, and the string memory is allocated by realloc() function. When the memory is resized by realloc() later, the old memory may be freed."], "mitigation": {"lang": "en:us", "value": "The default Red Hat Enterprise Linux kernel prevents unprivileged users from being able to use eBPF by the kernel.unprivileged_bpf_disabled sysctl. This would require a privileged user with CAP_SYS_ADMIN or root to be able to abuse this flaw reducing its attack space.\nFor the Red Hat Enterprise Linux 8 to confirm the current state, inspect the sysctl with the command:\n# cat /proc/sys/kernel/unprivileged_bpf_disabled\nThe setting of 1 would mean that unprivileged users can not use eBPF, mitigating the flaw."}, "name": "CVE-2022-3534", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Will not fix", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Will not fix", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Will not fix", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Will not fix", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2022-10-13T06:30:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2022-3534\nhttps://nvd.nist.gov/vuln/detail/CVE-2022-3534\nhttps://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next.git/commit/?id=93c660ca40b5d2f7c1b1626e955a8e9fa30e0749"], "threat_severity": "Low", "upstream_fix": "Kernel 6.2 RC1"}