CVE-2021-3490
Vulnerability from cvelistv5
Published
2021-06-04 01:40
Modified
2024-09-16 22:29
Severity ?
7.8 (High) - CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H
Summary
The eBPF ALU32 bounds tracking for bitwise ops (AND, OR and XOR) in the Linux kernel did not properly update 32-bit bounds, which could be turned into out of bounds reads and writes in the Linux kernel and therefore, arbitrary code execution. This issue was fixed via commit 049c4e13714e ("bpf: Fix alu32 const subreg bound tracking on bitwise operations") (v5.13-rc4) and backported to the stable kernels in v5.12.4, v5.11.21, and v5.10.37. The AND/OR issues were introduced by commit 3f50f132d840 ("bpf: Verifier, do explicit ALU32 bounds tracking") (5.7-rc1) and the XOR variant was introduced by 2921c90d4718 ("bpf:Fix a verifier failure with xor") ( 5.10-rc1).
References
security@ubuntu.comhttp://packetstormsecurity.com/files/164015/Linux-eBPF-ALU32-32-bit-Invalid-Bounds-Tracking-Local-Privilege-Escalation.htmlExploit, Third Party Advisory, VDB Entry
security@ubuntu.comhttps://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf.git/commit/?id=049c4e13714ecbca567b4d5f6d563f05d431c80ePatch, Vendor Advisory
security@ubuntu.comhttps://security.netapp.com/advisory/ntap-20210716-0004/Third Party Advisory
security@ubuntu.comhttps://ubuntu.com/security/notices/USN-4949-1Third Party Advisory
security@ubuntu.comhttps://ubuntu.com/security/notices/USN-4950-1Third Party Advisory
security@ubuntu.comhttps://www.openwall.com/lists/oss-security/2021/05/11/11Mailing List, Patch, Third Party Advisory
security@ubuntu.comhttps://www.zerodayinitiative.com/advisories/ZDI-21-606/Third Party Advisory, VDB Entry
af854a3a-2127-422b-91ae-364da2661108http://packetstormsecurity.com/files/164015/Linux-eBPF-ALU32-32-bit-Invalid-Bounds-Tracking-Local-Privilege-Escalation.htmlExploit, Third Party Advisory, VDB Entry
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf.git/commit/?id=049c4e13714ecbca567b4d5f6d563f05d431c80ePatch, Vendor Advisory
af854a3a-2127-422b-91ae-364da2661108https://security.netapp.com/advisory/ntap-20210716-0004/Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://ubuntu.com/security/notices/USN-4949-1Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://ubuntu.com/security/notices/USN-4950-1Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://www.openwall.com/lists/oss-security/2021/05/11/11Mailing List, Patch, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://www.zerodayinitiative.com/advisories/ZDI-21-606/Third Party Advisory, VDB Entry
Impacted products
Vendor Product Version
Linux Linux kernel Version: trunk   < v5.13-rc4
Version: linux-5.12.y   < v5.12.4
Version: linux-5.11.y   < v5.11.21
Version: linux-5.10.y   < v5.10.37
Version: v5.7-rc1   < 5.7*
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   },
}


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Security Advisory comment format.

This schema specifies the format of a comment related to a security advisory.

UUIDv4 of the comment
UUIDv4 of the Vulnerability-Lookup instance
When the comment was created originally
When the comment was last updated
Title of the comment
Description of the comment
The identifier of the vulnerability (CVE ID, GHSA-ID, PYSEC ID, etc.).



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Taxonomy of the tags.




Sightings

Author Source Type Date

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
  • Confirmed: The vulnerability is confirmed from an analyst perspective.
  • Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
  • Patched: This vulnerability was successfully patched by the user reporting the sighting.
  • Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
  • Not confirmed: The user expresses doubt about the veracity of the vulnerability.
  • Not patched: This vulnerability was not successfully patched by the user reporting the sighting.