CVE-2017-17449
published 2017-12-07CVE-2017-17449: The __netlink_deliver_tap_skb function in net/netlink/af_netlink.c in the Linux kernel through 4.14.4, when CONFIG_NLMON is enabled, does not restrict…
PriorityP418medium4.7CVSS 3.0
AVLACHPRLUINSUCHINAN
EPSS
0.44%
36.0th percentile
The __netlink_deliver_tap_skb function in net/netlink/af_netlink.c in the Linux kernel through 4.14.4, when CONFIG_NLMON is enabled, does not restrict observations of Netlink messages to a single net namespace, which allows local users to obtain sensitive information by leveraging the CAP_NET_ADMIN capability to sniff an nlmon interface for all Netlink activity on the system.
Affected
8 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| debian | linux | < linux 4.14.7-1 (bookworm) | linux 4.14.7-1 (bookworm) |
| linux | linux_kernel | <= 4.14.4 | — |
| linux | linux_kernel | >= 0 < 4.14.7-1 | 4.14.7-1 |
| linux | linux_kernel | >= 0 < 4.14.7-1 | 4.14.7-1 |
| linux | linux_kernel | >= 0 < 4.14.7-1 | 4.14.7-1 |
| linux | linux_kernel | >= 0 < 4.14.7-1 | 4.14.7-1 |
| linux | linux_kernel | >= 0 < 3.13.0-149.199 | 3.13.0-149.199 |
| linux | linux_kernel | >= 0 < 4.4.0-119.143 | 4.4.0-119.143 |
CVSS provenance
nvdv3.04.7MEDIUMCVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N
nvdv2.01.9LOWAV:L/AC:M/Au:N/C:P/I:N/A:N
osv8.8HIGH
vendor_ubuntu8.8HIGH
vendor_debian4.7MEDIUM
vendor_redhat4.7MEDIUM
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Ubuntu
Linux kernel (Trusty HWE) vulnerabilities
vendor_ubuntu·2018-05-22·CVSS 8.8
CVE-2017-12134 [HIGH] Linux kernel (Trusty HWE) vulnerabilities
Title: Linux kernel (Trusty HWE) vulnerabilities
Summary: Several security issues were addressed in the Linux kernel.
USN-3655-1 fixed vulnerabilities and added mitigations in the Linux
kernel for Ubuntu 14.04 LTS. This update provides the corresponding
updates for the Linux Hardware Enablement (HWE) kernel from Ubuntu
14.04 LTS for Ubuntu 12.04 ESM.
Jann Horn and Ken Johnson discovered that microprocessors utilizing
speculative execution of a memory read may allow unauthorized memory
reads via a sidechannel attack. This flaw is known as Spectre
Variant 4. A local attacker could use this to expose sensitive
information, including kernel memory. (CVE-2018-3639)
Jan H. Schönherr discovered that the Xen subsystem did not properly handle
block IO merges correctly in some situations. An att
Ubuntu
Linux kernel vulnerabilities
vendor_ubuntu·2018-05-22·CVSS 4.7
CVE-2017-17449 [MEDIUM] Linux kernel vulnerabilities
Title: Linux kernel vulnerabilities
Summary: Several security issues were addressed in the Linux kernel.
Jann Horn and Ken Johnson discovered that microprocessors utilizing
speculative execution of a memory read may allow unauthorized memory
reads via a sidechannel attack. This flaw is known as Spectre
Variant 4. A local attacker could use this to expose sensitive
information, including kernel memory. (CVE-2018-3639)
It was discovered that the netlink subsystem in the Linux kernel did not
properly restrict observations of netlink messages to the appropriate net
namespace. A local attacker could use this to expose sensitive information
(kernel netlink traffic). (CVE-2017-17449)
Tuba Yavuz discovered that a double-free error existed in the USBTV007
driver of the Linux kernel. A local att
Ubuntu
Linux kernel (HWE) vulnerabilities
vendor_ubuntu·2018-05-22·CVSS 4.7
CVE-2017-17449 [MEDIUM] Linux kernel (HWE) vulnerabilities
Title: Linux kernel (HWE) vulnerabilities
Summary: Several security issues were addressed in the Linux kernel.
USN-3653-1 fixed vulnerabilities and added mitigations in the Linux
kernel for Ubuntu 17.10. This update provides the corresponding
updates for the Linux Hardware Enablement (HWE) kernel from Ubuntu
17.10 for Ubuntu 16.04 LTS.
Jann Horn and Ken Johnson discovered that microprocessors utilizing
speculative execution of a memory read may allow unauthorized memory
reads via a sidechannel attack. This flaw is known as Spectre
Variant 4. A local attacker could use this to expose sensitive
information, including kernel memory. (CVE-2018-3639)
It was discovered that the netlink subsystem in the Linux kernel did not
properly restrict observations of netlink messages to the appropriate
Ubuntu
Linux kernel vulnerabilities
vendor_ubuntu·2018-05-22·CVSS 8.8
CVE-2017-12134 [HIGH] Linux kernel vulnerabilities
Title: Linux kernel vulnerabilities
Summary: Several security issues were addressed in the Linux kernel.
Jann Horn and Ken Johnson discovered that microprocessors utilizing
speculative execution of a memory read may allow unauthorized memory
reads via a sidechannel attack. This flaw is known as Spectre
Variant 4. A local attacker could use this to expose sensitive
information, including kernel memory. (CVE-2018-3639)
Jan H. Schönherr discovered that the Xen subsystem did not properly handle
block IO merges correctly in some situations. An attacker in a guest vm
could use this to cause a denial of service (host crash) or possibly gain
administrative privileges in the host. (CVE-2017-12134)
It was discovered that the Bluetooth HIP Protocol implementation in the
Linux kernel did not prope
Ubuntu
Linux kernel (Raspberry Pi 2) vulnerabilities
vendor_ubuntu·2018-05-22·CVSS 4.7
CVE-2017-17449 [MEDIUM] Linux kernel (Raspberry Pi 2) vulnerabilities
Title: Linux kernel (Raspberry Pi 2) vulnerabilities
Summary: Several security issues were fixed in the Linux kernel.
It was discovered that the netlink subsystem in the Linux kernel did not
properly restrict observations of netlink messages to the appropriate net
namespace. A local attacker could use this to expose sensitive information
(kernel netlink traffic). (CVE-2017-17449)
Tuba Yavuz discovered that a double-free error existed in the USBTV007
driver of the Linux kernel. A local attacker could use this to cause a
denial of service (system crash) or possibly execute arbitrary code.
(CVE-2017-17975)
It was discovered that a race condition existed in the Device Mapper
component of the Linux kernel. A local attacker could use this to cause a
denial of service (system crash). (CVE-201
Ubuntu
Linux kernel (Xenial HWE) vulnerabilities
vendor_ubuntu·2018-04-05·CVSS 7.8
CVE-2017-0861 [HIGH] Linux kernel (Xenial HWE) vulnerabilities
Title: Linux kernel (Xenial HWE) vulnerabilities
Summary: Several security issues were fixed in the Linux kernel.
USN-3619-1 fixed vulnerabilities in the Linux kernel for Ubuntu 16.04
LTS. This update provides the corresponding updates for the Linux
Hardware Enablement (HWE) kernel from Ubuntu 16.04 LTS for Ubuntu
14.04 LTS.
Jann Horn discovered that the Berkeley Packet Filter (BPF) implementation
in the Linux kernel improperly performed sign extension in some situations.
A local attacker could use this to cause a denial of service (system crash)
or possibly execute arbitrary code. (CVE-2017-16995)
It was discovered that a race condition leading to a use-after-free
vulnerability existed in the ALSA PCM subsystem of the Linux kernel. A
local attacker could use this to cause a denial of
Ubuntu
Linux kernel vulnerabilities
vendor_ubuntu·2018-04-04·CVSS 7.8
CVE-2017-0861 [HIGH] Linux kernel vulnerabilities
Title: Linux kernel vulnerabilities
Summary: Several security issues were fixed in the Linux kernel.
Jann Horn discovered that the Berkeley Packet Filter (BPF) implementation
in the Linux kernel improperly performed sign extension in some situations.
A local attacker could use this to cause a denial of service (system crash)
or possibly execute arbitrary code. (CVE-2017-16995)
It was discovered that a race condition leading to a use-after-free
vulnerability existed in the ALSA PCM subsystem of the Linux kernel. A
local attacker could use this to cause a denial of service (system crash)
or possibly execute arbitrary code. (CVE-2017-0861)
It was discovered that the KVM implementation in the Linux kernel allowed
passthrough of the diagnostic I/O port 0x80. An attacker in a guest VM
could
Red Hat
kernel: Missing namespace check in net/netlink/af_netlink.c allows for network monitors to observe systemwide activity
vendor_redhat·2017-12-05·CVSS 4.7
CVE-2017-17449 [MEDIUM] CWE-284 kernel: Missing namespace check in net/netlink/af_netlink.c allows for network monitors to observe systemwide activity
kernel: Missing namespace check in net/netlink/af_netlink.c allows for network monitors to observe systemwide activity
The __netlink_deliver_tap_skb function in net/netlink/af_netlink.c in the Linux kernel through 4.14.4, when CONFIG_NLMON is enabled, does not restrict observations of Netlink messages to a single net namespace, which allows local users to obtain sensitive information by leveraging the CAP_NET_ADMIN capability to sniff an nlmon interface for all Netlink activity on the system.
The __netlink_deliver_tap_skb function in net/netlink/af_netlink.c in the Linux kernel, through 4.14.4, does not restrict observations of Netlink messages to a single net namespace, when CONFIG_NLMON is enabled. This allows local users to obtain sensitive information by leveraging the CAP_NET_ADMIN
Debian
CVE-2017-17449: linux - The __netlink_deliver_tap_skb function in net/netlink/af_netlink.c in the Linux ...
vendor_debian·2017·CVSS 4.7
CVE-2017-17449 [MEDIUM] CVE-2017-17449: linux - The __netlink_deliver_tap_skb function in net/netlink/af_netlink.c in the Linux ...
The __netlink_deliver_tap_skb function in net/netlink/af_netlink.c in the Linux kernel through 4.14.4, when CONFIG_NLMON is enabled, does not restrict observations of Netlink messages to a single net namespace, which allows local users to obtain sensitive information by leveraging the CAP_NET_ADMIN capability to sniff an nlmon interface for all Netlink activity on the system.
Scope: local
bookworm: resolved (fixed in 4.14.7-1)
bullseye: resolved (fixed in 4.14.7-1)
forky: resolved (fixed in 4.14.7-1)
sid: resolved (fixed in 4.14.7-1)
trixie: resolved (fixed in 4.14.7-1)
GHSA
GHSA-qpxm-m9h2-3v4r: The __netlink_deliver_tap_skb function in net/netlink/af_netlink
ghsa_unreviewed·2022-05-14
CVE-2017-17449 [MEDIUM] CWE-200 GHSA-qpxm-m9h2-3v4r: The __netlink_deliver_tap_skb function in net/netlink/af_netlink
The __netlink_deliver_tap_skb function in net/netlink/af_netlink.c in the Linux kernel through 4.14.4, when CONFIG_NLMON is enabled, does not restrict observations of Netlink messages to a single net namespace, which allows local users to obtain sensitive information by leveraging the CAP_NET_ADMIN capability to sniff an nlmon interface for all Netlink activity on the system.
OSV
linux-hwe, linux-azure, linux-gcp, linux-oem vulnerabilities
osv·2018-05-22·CVSS 4.7
[MEDIUM] linux-hwe, linux-azure, linux-gcp, linux-oem vulnerabilities
linux-hwe, linux-azure, linux-gcp, linux-oem vulnerabilities
USN-3653-1 fixed vulnerabilities and added mitigations in the Linux
kernel for Ubuntu 17.10. This update provides the corresponding
updates for the Linux Hardware Enablement (HWE) kernel from Ubuntu
17.10 for Ubuntu 16.04 LTS.
Jann Horn and Ken Johnson discovered that microprocessors utilizing
speculative execution of a memory read may allow unauthorized memory
reads via a sidechannel attack. This flaw is known as Spectre
Variant 4. A local attacker could use this to expose sensitive
information, including kernel memory. (CVE-2018-3639)
It was discovered that the netlink subsystem in the Linux kernel did not
properly restrict observations of netlink messages to the appropriate net
namespace. A local attacker could use this to
OSV
linux vulnerabilities
osv·2018-05-22·CVSS 8.8
CVE-2018-3639 [HIGH] linux vulnerabilities
linux vulnerabilities
Jann Horn and Ken Johnson discovered that microprocessors utilizing
speculative execution of a memory read may allow unauthorized memory
reads via a sidechannel attack. This flaw is known as Spectre
Variant 4. A local attacker could use this to expose sensitive
information, including kernel memory. (CVE-2018-3639)
Jan H. Schönherr discovered that the Xen subsystem did not properly handle
block IO merges correctly in some situations. An attacker in a guest vm
could use this to cause a denial of service (host crash) or possibly gain
administrative privileges in the host. (CVE-2017-12134)
It was discovered that the Bluetooth HIP Protocol implementation in the
Linux kernel did not properly validate HID connection setup information. An
attacker could use this to cause a
OSV
linux-lts-xenial, linux-aws vulnerabilities
osv·2018-04-05·CVSS 7.8
[HIGH] linux-lts-xenial, linux-aws vulnerabilities
linux-lts-xenial, linux-aws vulnerabilities
USN-3619-1 fixed vulnerabilities in the Linux kernel for Ubuntu 16.04
LTS. This update provides the corresponding updates for the Linux
Hardware Enablement (HWE) kernel from Ubuntu 16.04 LTS for Ubuntu
14.04 LTS.
Jann Horn discovered that the Berkeley Packet Filter (BPF) implementation
in the Linux kernel improperly performed sign extension in some situations.
A local attacker could use this to cause a denial of service (system crash)
or possibly execute arbitrary code. (CVE-2017-16995)
It was discovered that a race condition leading to a use-after-free
vulnerability existed in the ALSA PCM subsystem of the Linux kernel. A
local attacker could use this to cause a denial of service (system crash)
or possibly execute arbitrary code. (CVE-2017-08
OSV
linux, linux-aws, linux-kvm, linux-raspi2, linux-snapdragon vulnerabilities
osv·2018-04-04·CVSS 7.8
CVE-2017-16995 [HIGH] linux, linux-aws, linux-kvm, linux-raspi2, linux-snapdragon vulnerabilities
linux, linux-aws, linux-kvm, linux-raspi2, linux-snapdragon vulnerabilities
Jann Horn discovered that the Berkeley Packet Filter (BPF) implementation
in the Linux kernel improperly performed sign extension in some situations.
A local attacker could use this to cause a denial of service (system crash)
or possibly execute arbitrary code. (CVE-2017-16995)
It was discovered that a race condition leading to a use-after-free
vulnerability existed in the ALSA PCM subsystem of the Linux kernel. A
local attacker could use this to cause a denial of service (system crash)
or possibly execute arbitrary code. (CVE-2017-0861)
It was discovered that the KVM implementation in the Linux kernel allowed
passthrough of the diagnostic I/O port 0x80. An attacker in a guest VM
could use this to cause a denial
OSV
CVE-2017-17449: The __netlink_deliver_tap_skb function in net/netlink/af_netlink
osv·2017-12-07·CVSS 4.7
CVE-2017-17449 [MEDIUM] CVE-2017-17449: The __netlink_deliver_tap_skb function in net/netlink/af_netlink
The __netlink_deliver_tap_skb function in net/netlink/af_netlink.c in the Linux kernel through 4.14.4, when CONFIG_NLMON is enabled, does not restrict observations of Netlink messages to a single net namespace, which allows local users to obtain sensitive information by leveraging the CAP_NET_ADMIN capability to sniff an nlmon interface for all Netlink activity on the system.
No detection rules found.
No public exploits indexed.
Bugzilla
CVE-2017-17449 kernel: Missing namespace check in net/netlink/af_netlink.c allows for network monitors to observe systemwide activity
bugzilla·2017-12-14·CVSS 4.7
CVE-2017-17449 [MEDIUM] CVE-2017-17449 kernel: Missing namespace check in net/netlink/af_netlink.c allows for network monitors to observe systemwide activity
CVE-2017-17449 kernel: Missing namespace check in net/netlink/af_netlink.c allows for network monitors to observe systemwide activity
The __netlink_deliver_tap_skb function in net/netlink/af_netlink.c in the Linux kernel through 4.14.4, when CONFIG_NLMON is enabled, does not restrict observations of Netlink messages to a single net namespace, which allows local users to obtain sensitive information by leveraging the CAP_NET_ADMIN capability to sniff an nlmon interface for all Netlink activity on the system.
References:
https://lkml.org/lkml/2017/12/5/950
http://patchwork.ozlabs.org/patch/845319/
An upstream patch:
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=93c647643b48f0131f02e45da3bd367d80443291
Discussion:
Created kernel tracking bugs for this i
Bugzilla
CVE-2017-17449 kernel: Missing namespace check in net/netlink/af_netlink.c allows for network monitors to observe systemwide activity [fedora-all]
bugzilla·2017-12-14·CVSS 4.7
CVE-2017-17449 [MEDIUM] CVE-2017-17449 kernel: Missing namespace check in net/netlink/af_netlink.c allows for network monitors to observe systemwide activity [fedora-all]
CVE-2017-17449 kernel: Missing namespace check in net/netlink/af_netlink.c allows for network monitors to observe systemwide activity [fedora-all]
This is an automatically created tracking bug! It was created to ensure
that one or more security vulnerabilities are fixed in affected versions
of fedora-all.
For comments that are specific to the vulnerability please use bugs filed
against the "Security Response" product referenced in the "Blocks" field.
For more information see:
http://fedoraproject.org/wiki/Security/TrackingBugs
When submitting as an update, use the fedpkg template provided in the next
comment(s). This will include the bug IDs of this tracking bug as well as
the relevant top-level CVE bugs.
Please also mention the CVE IDs being fixed in the RPM changelog and the
fedpkg
http://www.securityfocus.com/bid/102122https://access.redhat.com/errata/RHSA-2018:0654https://access.redhat.com/errata/RHSA-2018:0676https://access.redhat.com/errata/RHSA-2018:1062https://access.redhat.com/errata/RHSA-2018:1130https://access.redhat.com/errata/RHSA-2018:1170https://lkml.org/lkml/2017/12/5/950https://source.android.com/security/bulletin/pixel/2018-04-01https://usn.ubuntu.com/3619-1/https://usn.ubuntu.com/3619-2/https://usn.ubuntu.com/3653-1/https://usn.ubuntu.com/3653-2/https://usn.ubuntu.com/3655-1/https://usn.ubuntu.com/3655-2/https://usn.ubuntu.com/3657-1/https://www.debian.org/security/2017/dsa-4073https://www.debian.org/security/2018/dsa-4082http://www.securityfocus.com/bid/102122https://access.redhat.com/errata/RHSA-2018:0654https://access.redhat.com/errata/RHSA-2018:0676https://access.redhat.com/errata/RHSA-2018:1062https://access.redhat.com/errata/RHSA-2018:1130https://access.redhat.com/errata/RHSA-2018:1170https://lkml.org/lkml/2017/12/5/950https://source.android.com/security/bulletin/pixel/2018-04-01https://usn.ubuntu.com/3619-1/https://usn.ubuntu.com/3619-2/https://usn.ubuntu.com/3653-1/https://usn.ubuntu.com/3653-2/https://usn.ubuntu.com/3655-1/https://usn.ubuntu.com/3655-2/https://usn.ubuntu.com/3657-1/https://www.debian.org/security/2017/dsa-4073https://www.debian.org/security/2018/dsa-4082
2017-12-07
Published