CVE-2022-34918
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.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (5.50%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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.
- CVSS 3.1
- 7.8 HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 5.50% probability · 92th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-843
- Affected
- linux/linux kernel · debian/debian linux · canonical/ubuntu linux · netapp/h300s firmware · netapp/h500s firmware · netapp/h700s firmware · netapp/h410s firmware · netapp/h410c firmware
- Source
- cve@mitre.org
References
- http://packetstormsecurity.com/files/168191/Kernel-Live-Patch-Security-Notice-LSN-0089-1.htmlThird Party Advisory, VDB Entry
- http://packetstormsecurity.com/files/168543/Netfilter-nft_set_elem_init-Heap-Overflow-Privilege-Escalation.htmlExploit, Third Party Advisory, VDB Entry
- http://www.openwall.com/lists/oss-security/2022/07/05/1Exploit, Mailing List, Third Party Advisory
- http://www.openwall.com/lists/oss-security/2022/08/06/5Mailing List, Third Party Advisory
- https://git.kernel.org/pub/scm/linux/kernel/git/netdev/net.git/commit/?id=7e6bc1f6cabcd30aba0b11219d8e01b952eacbb6Mailing List, Patch, Vendor Advisory
- https://lore.kernel.org/netfilter-devel/cd9428b6-7ffb-dd22-d949-d86f4869f452%40randorisec.fr/T/#u
- https://security.netapp.com/advisory/ntap-20220826-0004/Third Party Advisory
- https://www.debian.org/security/2022/dsa-5191Third Party Advisory
- https://www.openwall.com/lists/oss-security/2022/07/02/3Exploit, Mailing List, Third Party Advisory
- https://www.randorisec.fr/crack-linux-firewall/Exploit, Third Party Advisory
- http://packetstormsecurity.com/files/168191/Kernel-Live-Patch-Security-Notice-LSN-0089-1.htmlThird Party Advisory, VDB Entry
- http://packetstormsecurity.com/files/168543/Netfilter-nft_set_elem_init-Heap-Overflow-Privilege-Escalation.htmlExploit, Third Party Advisory, VDB Entry
- http://www.openwall.com/lists/oss-security/2022/07/05/1Exploit, Mailing List, Third Party Advisory
- http://www.openwall.com/lists/oss-security/2022/08/06/5Mailing List, Third Party Advisory
- https://git.kernel.org/pub/scm/linux/kernel/git/netdev/net.git/commit/?id=7e6bc1f6cabcd30aba0b11219d8e01b952eacbb6Mailing List, Patch, Vendor Advisory
- https://lore.kernel.org/netfilter-devel/cd9428b6-7ffb-dd22-d949-d86f4869f452%40randorisec.fr/T/#u
- https://security.netapp.com/advisory/ntap-20220826-0004/Third Party Advisory
- https://www.debian.org/security/2022/dsa-5191Third Party Advisory
- https://www.openwall.com/lists/oss-security/2022/07/02/3Exploit, Mailing List, Third Party Advisory
- https://www.randorisec.fr/crack-linux-firewall/Exploit, Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.