Executive Summary

Informations
Name CVE-2021-33034 First vendor Publication 2021-05-14
Vendor Cve Last vendor Modification 2021-06-23

Security-Database Scoring CVSS v3

Cvss vector : CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Overall CVSS Score 7.8
Base Score 7.8 Environmental Score 7.8
impact SubScore 5.9 Temporal Score 7.8
Exploitabality Sub Score 1.8
 
Attack Vector Local Attack Complexity Low
Privileges Required Low User Interaction None
Scope Unchanged Confidentiality Impact High
Integrity Impact High Availability Impact High
Calculate full CVSS 3.0 Vectors scores

Security-Database Scoring CVSS v2

Cvss vector : (AV:L/AC:L/Au:N/C:P/I:P/A:P)
Cvss Base Score 4.6 Attack Range Local
Cvss Impact Score 6.4 Attack Complexity Low
Cvss Expoit Score 3.9 Authentication None Required
Calculate full CVSS 2.0 Vectors scores

Detail

In the Linux kernel before 5.12.4, net/bluetooth/hci_event.c has a use-after-free when destroying an hci_chan, aka CID-5c4c8c954409. This leads to writing an arbitrary value.

Original Source

Url : http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-33034

CWE : Common Weakness Enumeration

% Id Name
100 % CWE-416 Use After Free

CPE : Common Platform Enumeration

TypeDescriptionCount
Os 1
Os 3394

Sources (Detail)

Source Url
FEDORA https://lists.fedoraproject.org/archives/list/package-announce@lists.fedorapr...
MISC https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.12.4
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id...
https://sites.google.com/view/syzscope/kasan-use-after-free-read-in-hci_send_acl
https://syzkaller.appspot.com/bug?id=2e1943a94647f7732dd6fc60368642d6e8dc91b1
MLIST https://lists.debian.org/debian-lts-announce/2021/06/msg00019.html
https://lists.debian.org/debian-lts-announce/2021/06/msg00020.html

Alert History

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Date Informations
2021-06-23 09:23:08
  • Multiple Updates
2021-06-07 21:23:13
  • Multiple Updates
2021-06-05 01:44:33
  • Multiple Updates
2021-06-04 01:39:15
  • Multiple Updates
2021-06-03 01:40:11
  • Multiple Updates
2021-05-29 01:39:49
  • Multiple Updates
2021-05-29 00:22:52
  • Multiple Updates
2021-05-25 09:22:51
  • Multiple Updates
2021-05-25 00:22:50
  • Multiple Updates
2021-05-20 09:22:51
  • Multiple Updates
2021-05-18 05:22:47
  • Multiple Updates
2021-05-15 05:22:48
  • First insertion