PT-2019-5609 · Linux+2 · Linux Kernel+2

Vasily Averin · Published 2019-02-15 · Updated 2023-02-12 · CVE-2019-10140

Positive Technologies (AI Summary)

CVSS v3.1

5.5

Medium

Base vector

AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Name of the Vulnerable Software and Affected Versions Linux kernel versions up to 3.10

Description A denial of service situation can be created by an attacker with local access via a NULL pointer dereference in the ovl posix acl create function in fs/overlayfs/dir.c. This allows attackers who can create directories on overlayfs to crash the kernel, resulting in a denial of service. The issue is related to errors in pointer dereferencing in the ovl posix acl create function.

Recommendations For Linux kernel versions up to 3.10, as a temporary workaround, consider restricting access to the ovl posix acl create function in fs/overlayfs/dir.c to minimize the risk of exploitation. At the moment, there is no information about a newer version that contains a fix for this vulnerability.

DoS

Out of bounds Read

NULL Pointer Dereference

Weakness Enumeration

CWE-125

CWE-476

Related Identifiers

BDU:2019-03209

BDU:2020-04693

CESA-2019_2029

CVE-2019-10140

RHSA-2019:2029

RHSA-2019:2043

RHSA-2019_2029

RHSA-2019_2043

Affected Products

Centos

Linux Kernel

Red Hat

References · 28

• https://ubuntu.com/security/notices/USN-4115-1 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2019-15090 · Security Note
• https://osv.dev/vulnerability/CVE-2019-10140 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2019-10140 · Security Note
• https://ubuntu.com/security/notices/USN-4147-1 · Vendor Advisory
• https://bdu.fstec.ru/vul/2020-04693 · Security Note
• https://ubuntu.com/security/notices/USN-4118-1 · Vendor Advisory
• https://bdu.fstec.ru/vul/2019-03209 · Security Note
• https://github.com/torvalds/linux/commit/c09581a52765a85f19fc35340127396d5e3379cc · Note
• https://access.redhat.com/security/cve/cve-2019-10140 · Note
• https://kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.19.53 · Note
• https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-10140 · Note
• https://usn.ubuntu.com/4115-1 · Note
• https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-15090 · Note
• https://suse.com/security/cve/CVE-2019-10140 · Note