kernel: Unchecked capabilities in net/netfilter/xt_osf.c allows for unprivileged modification to systemwide fingerprint list
Published Dec 7, 2017
7.8
HIGHCVSS 3.0
EPSS 0.41%
Description
net/netfilter/xt_osf.c in the Linux kernel through 4.14.4 does not require the CAP_NET_ADMIN capability for add_callback and remove_callback operations, which allows local users to bypass intended access restrictions because the xt_osf_fingers data structure is shared across all net namespaces.
Affected products
No data.
- ≤ 4.14.4
No data.
Red Hat Enterprise Linux 5
kernel
Not affected
Red Hat Enterprise Linux 6
kernel
Will not fix
Red Hat Enterprise Linux 7
kernel
Will not fix
Red Hat Enterprise Linux 7
kernel-alt
Will not fix
Red Hat Enterprise Linux 7
kernel-rt
Will not fix
Red Hat Enterprise Linux 8
kernel
Not affected
Red Hat Enterprise MRG 2
realtime-kernel
Not affected
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 5 | kernel | Not affected | n/a |
| Red Hat Enterprise Linux 6 | kernel | Will not fix | n/a |
| Red Hat Enterprise Linux 7 | kernel | Will not fix | n/a |
| Red Hat Enterprise Linux 7 | kernel-alt | Will not fix | n/a |
| Red Hat Enterprise Linux 7 | kernel-rt | Will not fix | n/a |
| Red Hat Enterprise Linux 8 | kernel | Not affected | n/a |
| Red Hat Enterprise MRG 2 | realtime-kernel | Not affected | n/a |
No package ranges for this CVE.
Remediation
Red Hat statement
This issue does not affect the Linux kernel packages as shipped with Red Hat Enterprise Linux 5 and Red Hat Enterprise MRG 2, as a code with the flaw is not present or is not built in the products listed. This issue affects the versions of the Linux kernel as shipped with Red Hat Enterprise Linux 6, 7, its real-time kernel, Red Hat Enterprise Linux 7 for ARM 64 and Red Hat Enterprise Linux 7 for Power 9 LE. This has been rated as having Low security impact and is not currently planned to be addressed in future updates. For additional information, refer to the Red Hat Enterprise Linux Life Cycle: https://access.redhat.com/support/policy/updates/errata/.
Metrics
No CVSS v4.0 score for this CVE.
No CVSS v3.1 score for this CVE.
CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
1 other source (Red Hat) ▾
CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
AV:L/AC:L/Au:N/C:P/I:P/A:P
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 2, 2026.
Score over time
2021–2026- EPSS v1
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v1
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (14 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 2, 2026 | 0.41% (0.00406) | 32.53th | v5 (v2026.06.15) |
| Jun 15, 2026 | 0.39% (0.00390) | 30.55th | v5 (v2026.06.15) |
| Mar 17, 2025 | 0.05% (0.00054) | 14.16th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.04% (0.00044) | 11.89th | v3 (v2023.03.01) |
| Jul 2, 2024 | 0.04% (0.00044) | 10.25th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.04% (0.00044) | 8.24th | v3 (v2023.03.01) |
| Mar 6, 2023 | 1.55% (0.01547) | 74.98th | v2 (v2022.01.01) |
| Feb 23, 2023 | 1.55% (0.01547) | 74.94th | v2 (v2022.01.01) |
| Apr 1, 2022 | 1.55% (0.01547) | 72.92th | v2 (v2022.01.01) |
| Feb 4, 2022 | 1.55% (0.01547) | 51.82th | v2 (v2022.01.01) |
| Feb 3, 2022 | 1.55% (0.01550) | 33.53th | v1 |
| Jan 6, 2022 | 1.55% (0.01550) | 32.85th | v1 |
| Sep 1, 2021 | 1.55% (0.01550) | 72.76th | v1 |
| Apr 14, 2021 | 1.55% (0.01550) | 0.00th | v1 |
References (17)
- http://lists.opensuse.org/opensuse-security-announce/2018-01/msg00007.html vendor-advisoryx_refsource_SUSE
- http://www.securityfocus.com/bid/102110 vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry
- https://access.redhat.com/security/cve/CVE-2017-17450 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1525761 Issue Tracking
- https://lkml.org/lkml/2017/12/5/982 x_refsource_MISCThird Party Advisory
- https://nvd.nist.gov/vuln/detail/CVE-2017-17450
- https://usn.ubuntu.com/3583-1/ vendor-advisoryx_refsource_UBUNTU
- https://usn.ubuntu.com/3583-2/ vendor-advisoryx_refsource_UBUNTU
- https://usn.ubuntu.com/3617-1/ vendor-advisoryx_refsource_UBUNTU
- https://usn.ubuntu.com/3617-2/ vendor-advisoryx_refsource_UBUNTU
- https://usn.ubuntu.com/3617-3/ vendor-advisoryx_refsource_UBUNTU
- https://usn.ubuntu.com/3619-1/ vendor-advisoryx_refsource_UBUNTU
- https://usn.ubuntu.com/3619-2/ vendor-advisoryx_refsource_UBUNTU
- https://usn.ubuntu.com/3632-1/ vendor-advisoryx_refsource_UBUNTU
- https://www.cve.org/CVERecord?id=CVE-2017-17450
- https://www.debian.org/security/2017/dsa-4073 vendor-advisoryx_refsource_DEBIAN
- https://www.debian.org/security/2018/dsa-4082 vendor-advisoryx_refsource_DEBIAN
Change history (0)
No recorded changes yet.