CVE-2022-34918

 

Published at: - 04-07-2022 11:15

Last modified: - 26-10-2022 07:05

Total changes: - 10

Description

An issue was discovered in the Linux kernel through 5.18.9. A type confusion bug in nft_set_elem_init (leading to a buffer overflow) could be used by a local attacker to escalate privileges, a different vulnerability than CVE-2022-32250. (The attacker can obtain root access, but must start with an unprivileged user namespace to obtain CAP_NET_ADMIN access.) This can be fixed in nft_setelem_parse_data in net/netfilter/nf_tables_api.c.

Common Vulnerability Scoring System (CVSS)

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

 

Verification logic

 

Reference

• https://git.kernel.org/pub/scm/linux/kernel/git/netdev/net.git/commit/?id=7e6bc1f6cabcd30aba0b11219d8e01b952eacbb6
• https://www.openwall.com/lists/oss-security/2022/07/02/3
• https://lore.kernel.org/netfilter-devel/cd9428b6-7ffb-dd22-d949-d86f4869f452@randorisec.fr/T/#u
• [oss-security] 20220705 Re: Linux kernel: Netfilter heap buffer overflow in nft_set_elem_init-Exploit, Mailing List, Third Party Advisory
• https://www.randorisec.fr/crack-linux-firewall/
• DSA-5191-Third Party Advisory
• [oss-security] 20220806 Re: Linux kernel: Netfilter heap buffer overflow in nft_set_elem_init-Mailing List, Third Party Advisory
• https://security.netapp.com/advisory/ntap-20220826-0004/
• http://packetstormsecurity.com/files/168191/Kernel-Live-Patch-Security-Notice-LSN-0089-1.html
• http://packetstormsecurity.com/files/168543/Netfilter-nft_set_elem_init-Heap-Overflow-Privilege-Escalation.html

 

Keywords

NVD

 

CVE-2022-34918

 

CVE

 

Common vulnerabilities & exposures

 

CVSS

 

Common vulnerability scoring system

 

Security

 

Vulnerabilities

 

Exposures