CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
EPSS
Percentile
15.9%
Linux Kernel nftables Use-After-Free Local Privilege Escalation
Vulnerability; nft_chain_lookup_byid()
failed to check whether a chain
was active and CAP_NET_ADMIN is in any user or network namespace
Author | Note |
---|---|
eslerm | reporter at Pwn2Own 2023 as ZDI-CAN-20717 CWE-416 |
sbeattie | requires CAP_NET_ADMIN in any namespace, not just the init namespace. |
OS | Version | Architecture | Package | Version | Filename |
---|---|---|---|---|---|
ubuntu | 22.04 | noarch | linux | < 5.15.0-78.85 | UNKNOWN |
ubuntu | 23.04 | noarch | linux | < 6.2.0-26.26 | UNKNOWN |
ubuntu | 22.04 | noarch | linux-aws | < 5.15.0-1040.45 | UNKNOWN |
ubuntu | 23.04 | noarch | linux-aws | < 6.2.0-1008.8 | UNKNOWN |
ubuntu | 20.04 | noarch | linux-aws-5.15 | < 5.15.0-1040.45~20.04.1 | UNKNOWN |
ubuntu | 22.04 | noarch | linux-aws-5.19 | < 5.19.0-1029.30~22.04.1 | UNKNOWN |
ubuntu | 22.04 | noarch | linux-azure | < 5.15.0-1042.49 | UNKNOWN |
ubuntu | 23.04 | noarch | linux-azure | < 6.2.0-1008.8 | UNKNOWN |
ubuntu | 20.04 | noarch | linux-azure-5.15 | < 5.15.0-1042.49~20.04.1 | UNKNOWN |
ubuntu | 22.04 | noarch | linux-azure-fde | < 5.15.0-1042.49.1 | UNKNOWN |
launchpad.net/bugs/cve/CVE-2023-31248
lore.kernel.org/netfilter-devel/[email protected]/T/
nvd.nist.gov/vuln/detail/CVE-2023-31248
security-tracker.debian.org/tracker/CVE-2023-31248
ubuntu.com/security/notices/USN-6246-1
ubuntu.com/security/notices/USN-6247-1
ubuntu.com/security/notices/USN-6248-1
ubuntu.com/security/notices/USN-6250-1
ubuntu.com/security/notices/USN-6255-1
ubuntu.com/security/notices/USN-6260-1
ubuntu.com/security/notices/USN-6285-1
www.cve.org/CVERecord?id=CVE-2023-31248
www.openwall.com/lists/oss-security/2023/07/05/2
www.zerodayinitiative.com/advisories/ZDI-23-899/