Vulnerability Details : CVE-2021-32606

In the Linux kernel 5.11 through 5.12.2, isotp_setsockopt in net/can/isotp.c allows privilege escalation to root by leveraging a use-after-free. (This does not affect earlier versions that lack CAN ISOTP SF_BROADCAST support.)

Vulnerability category: Memory CorruptionGain privilege

Published 2021-05-11 23:15:09

Updated 2021-09-07 22:03:06

Source MITRE

View at NVD, CVE.org

Exploit prediction scoring system (EPSS) score for CVE-2021-32606

Probability of exploitation activity in the next 30 days: 0.05%

Percentile, the proportion of vulnerabilities that are scored at or less: ~ 12 % EPSS Score History EPSS FAQ

CVSS scores for CVE-2021-32606

Base Score	Base Severity	CVSS Vector	Exploitability Score	Impact Score	Source
7.2	HIGH	AV:L/AC:L/Au:N/C:C/I:C/A:C	3.9	10.0	[email protected]
Access Vector: Local Access Complexity: Low Authentication: None Confidentiality Impact: Complete Integrity Impact: Complete Availability Impact: Complete
7.8	HIGH	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H	1.8	5.9	[email protected]
Attack Vector: Local Attack Complexity: Low Privileges Required: Low User Interaction: None Scope: Unchanged Confidentiality: High Integrity: High Availability: High

CWE ids for CVE-2021-32606

CWE-416 Use After Free

Referencing memory after it has been freed can cause a program to crash, use unexpected values, or execute code.

Assigned by: [email protected] (Primary)

References for CVE-2021-32606

http://www.openwall.com/lists/oss-security/2021/05/28/1

Mailing List;Patch;Third Party Advisory
https://lists.fedoraproject.org/archives/list/[email protected]/message/HD3NJBG25AADVGPRC63RX2JOQBMPSWK4/

Mailing List;Third Party Advisory
https://security.netapp.com/advisory/ntap-20210625-0001/

Third Party Advisory
https://www.openwall.com/lists/oss-security/2021/05/11/16

Mailing List;Third Party Advisory
http://www.openwall.com/lists/oss-security/2021/05/12/1

Mailing List;Third Party Advisory
http://www.openwall.com/lists/oss-security/2021/05/13/2

Mailing List;Third Party Advisory
https://lists.fedoraproject.org/archives/list/[email protected]/message/GI7Z7UBWBGD3ABNIL2DC7RQDCGA4UVQW/

Mailing List;Third Party Advisory

CVEs referencing this url
https://lists.fedoraproject.org/archives/list/[email protected]/message/73D53S4IZFPFQMRABMXXLW4AJK3EULDX/

Mailing List;Third Party Advisory
http://www.openwall.com/lists/oss-security/2021/05/14/1

Mailing List;Third Party Advisory

Products affected by CVE-2021-32606

Linux » Linux Kernel
Versions from including (>=) 5.11 and before (<) 5.12.9
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
Matching versions
Fedoraproject » Fedora » Version: 32
cpe:2.3:o:fedoraproject:fedora:32:*:*:*:*:*:*:*
Matching versions
Fedoraproject » Fedora » Version: 33
cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:*
Matching versions
Fedoraproject » Fedora » Version: 34
cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:*
Matching versions