Vulnerability identifier: #VU68424
Vulnerability risk: Low
CVSSv3.1: 6.8 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]
CVE-ID:
CWE-ID:
CWE-416
Exploitation vector: Local
Exploit availability: No
Vulnerable software:
Linux kernel
Operating systems & Components /
Operating system
Vendor: Linux Foundation
Description
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a use-after-free error caused by the reuse of a DCCP socket with an attached dccps_hc_tx_ccid object as a listener. A local user can trigger a use-after-free error and execute arbitrary code with elevated privileges.
Mitigation
Install updates from vendor's website.
Vulnerable software versions
Linux kernel:
External links
http://launchpad.net/bugs/1883840
http://ubuntu.com/USN-4580-1
http://git.launchpad.net/~ubuntu-kernel/ubuntu/+source/linux/+git/focal/commit/?id=01872cb896c76cedeabe93a08456976ab55ad695
http://ubuntu.com/USN-4578-1
http://ubuntu.com/USN-4579-1
http://ubuntu.com/USN-4576-1
http://ubuntu.com/USN-4577-1
http://lore.kernel.org/netdev/20201013171849.236025-1-kleber.souza@canonical.com/T/
http://security.netapp.com/advisory/ntap-20210304-0006/
http://www.debian.org/security/2021/dsa-4978
http://lists.debian.org/debian-lts-announce/2021/10/msg00010.html
http://lists.debian.org/debian-lts-announce/2021/12/msg00012.html
Can this vulnerability be exploited remotely?
No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.