PT-2019-3986 · Linux+1 · Linux Kernel+1

Published 2019-09-30 · Updated 2021-05-28 · CVE-2019-18807

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 5.3.5

Description The issue is related to two memory leaks in the sja1105 static config upload() function, which can cause a denial of service due to memory consumption. This can be triggered by failures in static config buf prepare for upload() or sja1105 inhibit tx(). The vulnerability allows remote attackers to exploit the issue, leading to a denial of service.

Recommendations For Linux kernel versions prior to 5.3.5, update to version 5.3.5 or later to resolve the issue. As a temporary workaround, consider restricting access to the sja1105 static config upload() function until a patch is available.

Fix

DoS

Memory Leak

Resource Exhaustion

Weakness Enumeration

CWE-401

CWE-400

Related Identifiers

ALT-PU-2019-2845

ALT-PU-2019-2891

ALT-PU-2019-3061

ALT-PU-2020-1198

ALT-PU-2020-1501

ALT-PU-2020-1714

ALT-PU-2020-2410

ALT-PU-2020-2433

ALT-PU-2021-1870

BDU:2019-04517

CVE-2019-18807

Affected Products

Alt Linux

Linux Kernel

References · 15

• https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.3.5 · Vendor Advisory
• https://ubuntu.com/security/CVE-2019-18807 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2019-18807 · Vendor Advisory
• https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=68501df92d116b760777a2cfda314789f926476f · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2019-18807 · Security Note
• https://osv.dev/vulnerability/DEBIAN-CVE-2019-18807 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2019-18807 · Security Note
• https://osv.dev/vulnerability/CVE-2019-18807 · Vendor Advisory
• https://bdu.fstec.ru/vul/2019-04517 · Security Note
• https://security-tracker.debian.org/tracker/CVE-2019-18807 · Vendor Advisory
• https://kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.3.5 · Note
• https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-18807 · Note
• https://security.netapp.com/advisory/ntap-20191205-0001 · Note
• https://git.kernel.org/linus/68501df92d116b760777a2cfda314789f926476f · Note
• https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=68501df92d116b760777a2cfda314789f926476f · Note