CVE-2017-17448
net/netfilter/nfnetlink_cthelper.c in the Linux kernel through 4.14.4 does not require the CAP_NET_ADMIN capability for new, get, and del operations, which allows local users to bypass intended access restrictions because the nfnl_cthelper_list data…
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.37%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
net/netfilter/nfnetlink_cthelper.c in the Linux kernel through 4.14.4 does not require the CAP_NET_ADMIN capability for new, get, and del operations, which allows local users to bypass intended access restrictions because the nfnl_cthelper_list data structure is shared across all net namespaces.
- CVSS 3.0
- 7.8 HIGHCVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 0.37% probability · 31th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-862
- Affected
- linux/linux kernel
- Source
- cve@mitre.org
References
- http://www.securityfocus.com/bid/102117Third Party Advisory, VDB Entry
- https://access.redhat.com/errata/RHSA-2018:0654
- https://access.redhat.com/errata/RHSA-2018:0676
- https://access.redhat.com/errata/RHSA-2018:1062
- https://patchwork.kernel.org/patch/10089373/Patch, Vendor Advisory
- https://usn.ubuntu.com/3617-1/
- https://usn.ubuntu.com/3617-2/
- https://usn.ubuntu.com/3617-3/
- https://usn.ubuntu.com/3619-1/
- https://usn.ubuntu.com/3619-2/
- https://usn.ubuntu.com/3620-1/
- https://usn.ubuntu.com/3620-2/
- https://usn.ubuntu.com/3632-1/
- https://www.debian.org/security/2017/dsa-4073
- https://www.debian.org/security/2018/dsa-4082
- http://www.securityfocus.com/bid/102117Third Party Advisory, VDB Entry
- https://access.redhat.com/errata/RHSA-2018:0654
- https://access.redhat.com/errata/RHSA-2018:0676
- https://access.redhat.com/errata/RHSA-2018:1062
- https://patchwork.kernel.org/patch/10089373/Patch, Vendor Advisory
- https://usn.ubuntu.com/3617-1/
- https://usn.ubuntu.com/3617-2/
- https://usn.ubuntu.com/3617-3/
- https://usn.ubuntu.com/3619-1/
- https://usn.ubuntu.com/3619-2/
- https://usn.ubuntu.com/3620-1/
- https://usn.ubuntu.com/3620-2/
- https://usn.ubuntu.com/3632-1/
- https://www.debian.org/security/2017/dsa-4073
- https://www.debian.org/security/2018/dsa-4082
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.