CVE Vulnerability

CVE-2021-23133

A race condition in Linux kernel SCTP sockets (net/sctp/socket.c) before 5.12-rc8 can lead to kernel privilege escalation from the context of a network service or an unprivileged process. If sctp_destroy_sock is called without sock_net(sk)->sctp.addr_wq_lock then an element is removed from the auto_asconf_splist list without any proper locking. This can be exploited by an attacker with network service privileges to escalate to root or from the context of an unprivileged user directly if a BPF_CGROUP_INET_SOCK_CREATE is attached which denies creation of some SCTP socket.

6.9 /10

CVSS v2.0 :

V3 Legend

Vector :

Exploitability : 3.4 / Impact : 10

Attack Vector

Attack Complexity

Privileges Required

User Interaction

Confidentiality Impact COMPLETE

Integrity Impact COMPLETE

Availability Impact COMPLETE

Scope

7 /10

CVSS v3.0 : HIGH

V3 Legend

Vector :

Exploitability : 1 / Impact : 5.9

Attack Vector LOCAL

Attack Complexity HIGH

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References
Link Resource
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=b166a20b07382b8bc1dcee2a448715c9c2c81b5b Mailing List Patch
https://www.openwall.com/lists/oss-security/2021/04/18/2 Exploit Mailing List
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/PAEQ3H6HKNO6KUCGRZVYSFSAGEUX23JL/ Mailing List Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/CUX2CA63453G34C6KYVBLJXJXEARZI2X/ Mailing List Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/XZASHZVCOFJ4VU2I3BN5W5EPHWJQ7QWX/ Mailing List Third Party Advisory
http://www.openwall.com/lists/oss-security/2021/05/10/1 Mailing List Patch
http://www.openwall.com/lists/oss-security/2021/05/10/2 Mailing List Patch
http://www.openwall.com/lists/oss-security/2021/05/10/3 Mailing List Patch
http://www.openwall.com/lists/oss-security/2021/05/10/4 Mailing List Patch
https://security.netapp.com/advisory/ntap-20210611-0008/ Third Party Advisory
https://lists.debian.org/debian-lts-announce/2021/06/msg00020.html Mitigation Third Party Advisory
https://lists.debian.org/debian-lts-announce/2021/06/msg00019.html Mitigation Third Party Advisory
Configurations

Configuration 1

cpe:2.3:o:linux:linux_kernel:5.12:rc1:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.12:rc2:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.12:rc3:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.12:rc4:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.12:-:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.12:rc5:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.12:rc6:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.12:rc7:*:*:*:*:*:*
cpe:2.3:o:fedoraproject:fedora:32:*:*:*:*:*:*:*
cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:*
cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:*
cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*
cpe:2.3:a:netapp:cloud_backup:-:*:*:*:*:*:*:*
cpe:2.3:a:netapp:solidfire_&_hci_management_node:-:*:*:*:*:*:*:*
cpe:2.3:o:broadcom:brocade_fabric_operating_system:-:*:*:*:*:*:*:*
Information

Published : 2021-04-22 06:15

Updated : 2022-10-07 02:56

NVD link : CVE-2021-23133

Mitre link : CVE-2021-23133

Products Affected

Linux

Linux Kernel

CWE
CWE-362