Local denial of service in Linux kernel netfilter

1) Memory leak

EUVDB-ID: #VU86248

Risk: Low

CVSSv3.1: 3.9 [CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2023-7192

CWE-ID: CWE-401 - Missing release of memory after effective lifetime

Exploit availability: No

Description

The vulnerability allows a local user to perform DoS attack on the target system.

The vulnerability exists due memory leak within the ctnetlink_create_conntrack() function in net/netfilter/nf_conntrack_netlink.c. A local user with CAP_NET_ADMIN privileges can perform denial of service attack.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Linux kernel: before 6.3 rc1

External links

http://access.redhat.com/security/cve/CVE-2023-7192
http://bugzilla.redhat.com/show_bug.cgi?id=2256279
http://git.kernel.org/pub/scm/linux/kernel/git/netdev/net.git/commit/?id=ac4893980bbe79ce383daf9a0885666a30fe4c83
http://access.redhat.com/errata/RHSA-2024:0723
http://access.redhat.com/errata/RHSA-2024:0725

Q & A

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.