CVE-2021-3573: Race Condition
First published: Tue Jun 01 2021(Updated: )
A flaw use-after-free in function hci_sock_bound_ioctl() of the Linux kernel HCI subsystem was found in the way user calls ioct HCIUNBLOCKADDR or other way triggers race condition of the call hci_unregister_dev() together with one of the calls hci_sock_blacklist_add(), hci_sock_blacklist_del(), hci_get_conn_info(), hci_get_auth_info(). A privileged local user could use this flaw to crash the system or escalate their privileges on the system.
Credit: secalert@redhat.com secalert@redhat.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| redhat/kernel-rt | <0:3.10.0-1160.59.1.rt56.1200.el7 | 0:3.10.0-1160.59.1.rt56.1200.el7 |
| redhat/kernel | <0:3.10.0-1160.59.1.el7 | 0:3.10.0-1160.59.1.el7 |
| redhat/kernel-rt | <0:4.18.0-348.rt7.130.el8 | 0:4.18.0-348.rt7.130.el8 |
| redhat/kernel | <0:4.18.0-348.el8 | 0:4.18.0-348.el8 |
| Linux Linux kernel | <5.13 | |
| Linux Linux kernel | =5.13-rc1 | |
| Linux Linux kernel | =5.13-rc2 | |
| Linux Linux kernel | =5.13-rc3 | |
| Linux Linux kernel | =5.13-rc4 | |
| Redhat Enterprise Linux | =6.0 | |
| Redhat Enterprise Linux | =7.0 | |
| Redhat Enterprise Linux | =8.0 | |
| Fedoraproject Fedora | =34 | |
| redhat/kernel | <5.13 | 5.13 |
| debian/linux | 5.10.223-1 5.10.226-1 6.1.115-1 6.1.119-1 6.12.5-1 6.12.6-1 |
Remedy
Mitigation for this issue is either not available or the currently available options don't meet the Red Hat Product Security criteria comprising easThe required privileges is CAP_NET_ADMIN capabilities. This would require a privileged user with CAP_SYS_ADMIN or root to be able to abuse this flaw reducing its attack space.e of use and deployment, applicability to widespread installation base or stability.
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Reference Links
- https://www.cve.org/CVERecord?id=CVE-2021-3573 https://nvd.nist.gov/vuln/detail/CVE-2021-3573 https://git.kernel.org/pub/scm/linux/kernel/git/bluetooth/bluetooth.git/commit/?id=e305509e678b3a4af2b3cfd410f409f7cdaabb52 https://www.openwall.com/lists/oss-security/2021/06/08/2
- https://bugzilla.redhat.com/show_bug.cgi?id=1966578
- https://access.redhat.com/errata/RHSA-2022:0622
- https://access.redhat.com/errata/RHSA-2022:0620
- https://access.redhat.com/errata/RHSA-2021:4140
- https://access.redhat.com/errata/RHSA-2021:4356
- https://access.redhat.com/security/cve/cve-2021-3573
- http://www.openwall.com/lists/oss-security/2023/07/02/1
- https://git.kernel.org/pub/scm/linux/kernel/git/bluetooth/bluetooth.git/commit/?id=e305509e678b3a4af2b3cfd410f409f7cdaabb52
- https://www.openwall.com/lists/oss-security/2021/06/08/2
- https://launchpad.net/bugs/cve/CVE-2021-3573
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1969475
- https://security-tracker.debian.org/tracker/CVE-2021-3573
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-3573
- https://nvd.nist.gov/vuln/detail/CVE-2021-3573
- https://ubuntu.com/security/CVE-2021-3573
Parent vulnerabilities
(Appears in the following advisories)
- collector/redhat-cve
- collector/nvd-index
- agent/type
- agent/first-publish-date
- collector/launchpad-cve
- source/Launchpad
- agent/author
- agent/severity
- collector/redhat-bugzilla
- source/Red Hat
- alias/CVE-2021-3573
- agent/software-canonical-lookup
- agent/weakness
- collector/mitre-cve
- source/MITRE
- agent/remedy
- agent/references
- collector/usn-cve
- source/Ubuntu
- agent/tags
- agent/description
- agent/event
- collector/nvd-cve
- source/NVD
- agent/last-modified-date
- collector/security-tracker-debian
- source/Debian
- agent/softwarecombine
- agent/trending
- package-manager/redhat
- vendor/linux
- canonical/linux linux kernel
- version/linux linux kernel/5.13-rc1
- version/linux linux kernel/5.13-rc2
- version/linux linux kernel/5.13-rc3
- version/linux linux kernel/5.13-rc4
- vendor/redhat
- canonical/redhat enterprise linux
- version/redhat enterprise linux/6.0
- version/redhat enterprise linux/7.0
- version/redhat enterprise linux/8.0
- vendor/fedoraproject
- canonical/fedoraproject fedora
- version/fedoraproject fedora/34
- package-manager/debian