CVE-2017-17448
High
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.
SeverityHigh
CVSS7.8
Exploit probability—
Product
Linux Kernel
PublishedDec 7, 2017
First seenDec 7, 2017
How to fix
Vendor advisories
- usn.ubuntu.com/3617-1/
- usn.ubuntu.com/3619-2/
- debian.org/security/2018/dsa-4082
- usn.ubuntu.com/3617-3/
- usn.ubuntu.com/3632-1/
- usn.ubuntu.com/3620-2/
- access.redhat.com/errata/RHSA-2018:1062
- access.redhat.com/errata/RHSA-2018:0654
- access.redhat.com/errata/RHSA-2018:0676
- debian.org/security/2017/dsa-4073
- usn.ubuntu.com/3617-2/
- usn.ubuntu.com/3620-1/
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| linux linux_kernel | v ≤ 4.14.4 | — |
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