PT-2019-4691 · Linux+4 · Linux Kernel+4

Mao Wenan · Published 2019-03-02 · Updated 2021-07-21 · CVE-2019-16994

Positive Technologies (AI Summary)

CVSS v2.0

7.8

High

Base vector

AV:N/AC:L/Au:N/C:N/I:N/A:C

Name of the Vulnerable Software and Affected Versions Linux kernel versions prior to 5.0

Description A memory leak exists in the sit init net() function in net/ipv6/sit.c when register netdev() fails to register sitn->fb tunnel dev. This issue may cause denial of service. The vulnerability is related to a resource not being released after its expiration, which can be exploited by a remote attacker to cause a denial of service.

Recommendations For Linux kernel versions prior to 5.0, update to version 5.0 or later to resolve the issue. At the moment, there is no information about additional mitigation measures for this vulnerability.

Exploit

Fix

DoS

Missing Release of Resource after Effective Lifetime

Memory Leak

Weakness Enumeration

CWE-772

CWE-401

Related Identifiers

ALT-PU-2019-1506

ALT-PU-2019-1548

ALT-PU-2020-1198

ALT-PU-2020-1501

ALT-PU-2020-2410

ALT-PU-2020-2433

ALT-PU-2021-1870

BDU:2020-01063

CESA-2019_3309

CESA-2019_3517

CESA-2020_4060

CVE-2019-16994

OPENSUSE-SU-2020:0336-1

OPENSUSE-SU-2020_0336-1

RHSA-2019:3309

RHSA-2019:3517

RHSA-2019_3309

RHSA-2019_3517

RHSA-2020:4060

RHSA-2020:4062

RHSA-2020_4060

RHSA-2020_4062

SUSE-SU-2020:0511-1

SUSE-SU-2020:0558-1

SUSE-SU-2020:0559-1

SUSE-SU-2020:0560-1

SUSE-SU-2020:0580-1

SUSE-SU-2020:0584-1

SUSE-SU-2020:0599-1

SUSE-SU-2020:0605-1

SUSE-SU-2020:0613-1

SUSE-SU-2020:1663-1

SUSE-SU-2020_1663-1

Affected Products

Alt Linux

Centos

Linux Kernel

Red Hat

Suse

References · 540

• 🔥 https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=07f12b26e21ab359261bf75cfcb424fdc7daeb6d · Exploit
• https://github.com/torvalds/linux/commit/07f12b26e21ab359261bf75cfcb424fdc7daeb6d · Patch
• https://nvd.nist.gov/vuln/detail/CVE-2019-16994 · Security Note
• https://security-tracker.debian.org/tracker/CVE-2019-16994 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2020:0584-1 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2019-16994 · Security Note
• https://osv.dev/vulnerability/SUSE-SU-2020:1663-1 · Vendor Advisory
• https://osv.dev/vulnerability/DEBIAN-CVE-2019-16994 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2020:0605-1 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2019-16994 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2019-16994 · Vendor Advisory
• https://bdu.fstec.ru/vul/2020-01063 · Security Note
• https://linux.oracle.com/errata/ELSA-2019-4872.html · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2020:0511-1 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2020:0580-1 · Vendor Advisory