CVE-2021-33624

CVSS V2 Medium 4.7 CVSS V3 Medium 4.7
Description
In kernel/bpf/verifier.c in the Linux kernel before 5.12.13, a branch can be mispredicted (e.g., because of type confusion) and consequently an unprivileged BPF program can read arbitrary memory locations via a side-channel attack, aka CID-9183671af6db.
Overview
  • CVE ID
  • CVE-2021-33624
  • Assigner
  • cve@mitre.org
  • Vulnerability Status
  • Analyzed
  • Published Version
  • 2021-06-23T16:15:07
  • Last Modified Date
  • 2021-11-12T20:15:15
Weakness Enumerations
CWE URL
CWE-203 http://cwe.mitre.org/data/definitions/203.html
CPE Configuration (Product)
CPE Vulnerable Operator Version Start Version End
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* 1 OR 5.12.13
cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:* 1 OR
CVSS Version 2
  • Version
  • 2.0
  • Vector String
  • AV:L/AC:M/Au:N/C:C/I:N/A:N
  • Access Vector
  • LOCAL
  • Access Compatibility
  • MEDIUM
  • Authentication
  • NONE
  • Confidentiality Impact
  • COMPLETE
  • Integrity Impact
  • NONE
  • Availability Impact
  • NONE
  • Base Score
  • 4.7
  • Severity
  • MEDIUM
  • Exploitability Score
  • 3.4
  • Impact Score
  • 6.9
CVSS Version 3
  • Version
  • 3.1
  • Vector String
  • CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N
  • Attack Vector
  • LOCAL
  • Attack Compatibility
  • HIGH
  • Privileges Required
  • LOW
  • User Interaction
  • NONE
  • Scope
  • UNCHANGED
  • Confidentiality Impact
  • HIGH
  • Availability Impact
  • NONE
  • Base Score
  • 4.7
  • Base Severity
  • MEDIUM
  • Exploitability Score
  • 1
  • Impact Score
  • 3.6
References
Reference URL Reference Tags
https://www.usenix.org/conference/usenixsecurity21/presentation/kirzner Third Party Advisory
http://www.openwall.com/lists/oss-security/2021/06/21/1 Mailing List Exploit Third Party Advisory
https://github.com/torvalds/linux/commit/9183671af6dbf60a1219371d4ed73e23f43b49db Patch Third Party Advisory
https://lists.debian.org/debian-lts-announce/2021/10/msg00010.html Issue Tracking Third Party Advisory
Sources
Source Name Source URL
NIST https://nvd.nist.gov/vuln/detail/CVE-2021-33624
MITRE https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-33624
History
Created Old Value New Value Data Type Notes
2022-05-10 06:47:29 Added to TrackCVE
2022-12-05 04:52:44 2021-06-23T16:15Z 2021-06-23T16:15:07 CVE Published Date updated
2022-12-05 04:52:44 2021-11-12T20:15:15 CVE Modified Date updated
2022-12-05 04:52:44 Analyzed Vulnerability Status updated