Linux Kernel up to 4.17.10 HFS+ File System fs/hfsplus/dir.c hfsplus_lookup null pointer dereference
CVSS Meta Temp Score | Current Exploit Price (≈) | CTI Interest Score |
---|---|---|
4.3 | $0-$5k | 0.00 |
A vulnerability has been found in Linux Kernel up to 4.17.10 (Operating System) and classified as problematic. Affected by this vulnerability is the function hfsplus_lookup
of the file fs/hfsplus/dir.c of the component HFS+ File System Handler. The manipulation with an unknown input leads to a null pointer dereference vulnerability. The CWE definition for the vulnerability is CWE-476. A NULL pointer dereference occurs when the application dereferences a pointer that it expects to be valid, but is NULL, typically causing a crash or exit. As an impact it is known to affect availability. The summary by CVE is:
An issue was discovered in the Linux kernel through 4.17.10. There is a NULL pointer dereference and panic in hfsplus_lookup() in fs/hfsplus/dir.c when opening a file (that is purportedly a hard link) in an hfs+ filesystem that has malformed catalog data, and is mounted read-only without a metadata directory.
The bug was discovered 07/02/2018. The weakness was released 07/27/2018 (Website). It is possible to read the advisory at securityfocus.com. This vulnerability is known as CVE-2018-14617 since 07/26/2018. The attack can be launched remotely. The exploitation doesn't need any form of authentication. It demands that the victim is doing some kind of user interaction. Technical details of the vulnerability are known, but there is no available exploit.
The vulnerability was handled as a non-public zero-day exploit for at least 25 days. During that time the estimated underground price was around $0-$5k. The vulnerability scanner Nessus provides a plugin with the ID 117862 (Debian DSA-4308-1 : linux - security update), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Debian Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 197306 (Ubuntu Security Notification for Linux, Linux-aws, Linux-kvm, Linux-raspi2, Linux-snapdragon Vulnerabilities (USN-3821-1)).
Upgrading eliminates this vulnerability. A possible mitigation has been published 3 months after the disclosure of the vulnerability.
The vulnerability is also documented in the vulnerability database at Tenable (117862).
Product
Type
Vendor
Name
Version
License
CPE 2.3
CPE 2.2
CVSSv4
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CVSSv3
VulDB Meta Base Score: 4.4VulDB Meta Temp Score: 4.3
VulDB Base Score: 3.3
VulDB Temp Score: 3.2
VulDB Vector: 🔍
VulDB Reliability: 🔍
NVD Base Score: 5.5
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CVSSv2
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Exploiting
Class: Null pointer dereferenceCWE: CWE-476 / CWE-404
CAPEC: 🔍
ATT&CK: 🔍
Local: No
Remote: Yes
Availability: 🔍
Status: Not defined
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Nessus ID: 117862
Nessus Name: Debian DSA-4308-1 : linux - security update
Nessus File: 🔍
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Qualys ID: 🔍
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Threat Intelligence
Interest: 🔍Active Actors: 🔍
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Countermeasures
Recommended: UpgradeStatus: 🔍
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Timeline
07/02/2018 🔍07/26/2018 🔍
07/27/2018 🔍
07/27/2018 🔍
07/27/2018 🔍
07/27/2018 🔍
10/01/2018 🔍
10/02/2018 🔍
04/27/2023 🔍
Sources
Vendor: kernel.orgAdvisory: USN-3821-1⛔
Status: Confirmed
CVE: CVE-2018-14617 (🔍)
OVAL: 🔍
SecurityFocus: 104917 - Linux Kernel Multiple Denial of Service Vulnerabilities
Entry
Created: 07/27/2018 07:59Updated: 04/27/2023 08:49
Changes: 07/27/2018 07:59 (78), 03/10/2020 17:07 (5), 04/27/2023 08:49 (4)
Complete: 🔍
Cache ID: 3:952:103
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