Linux Kernel up to 4.17.10 f2fs Image fs/f2fs/segment.c __remove_dirty_segment null pointer dereference

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CTI Interest Score
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5.3$0-$5k0.00

Summaryinfo

A vulnerability classified as critical was found in Linux Kernel up to 4.17.10. Impacted is the function __remove_dirty_segment of the file fs/f2fs/segment.c of the component f2fs Image Handler. Executing a manipulation can lead to null pointer dereference. This vulnerability appears as CVE-2018-14614. The attack requires local access. There is no available exploit. Upgrading the affected component is advised.

Detailsinfo

A vulnerability classified as critical was found in Linux Kernel up to 4.17.10 (Operating System). This vulnerability affects the function __remove_dirty_segment of the file fs/f2fs/segment.c of the component f2fs Image 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 confidentiality, integrity, and availability. CVE summarizes:

An issue was discovered in the Linux kernel through 4.17.10. There is an out-of-bounds access in __remove_dirty_segment() in fs/f2fs/segment.c when mounting an f2fs image.

The bug was discovered 07/02/2018. The weakness was presented 07/27/2018 (Website). The advisory is shared for download at securityfocus.com. This vulnerability was named CVE-2018-14614 since 07/26/2018. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. Successful exploitation requires user interaction by the victim. There are known technical details, but no exploit is available.

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 $5k-$25k. The vulnerability scanner Nessus provides a plugin with the ID 121505 (Slackware 14.2 : Slackware 14.2 kernel (SSA:2019-030-01)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Slackware Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 197415 (Ubuntu Security Notification for Linux, Linux-aws, Linux-kvm, Linux-raspi2, Linux-snapdragon Vulnerabilities (USN-3932-1)).

Upgrading eliminates this vulnerability. A possible mitigation has been published 7 months after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at Tenable (121505) and SecurityFocus (BID 104917†). See VDB-115503, VDB-122243, VDB-122244 and VDB-122245 for similar entries. VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.4
VulDB Meta Temp Score: 5.3

VulDB Base Score: 5.3
VulDB Temp Score: 5.1
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 5.5
NVD Vector: 🔍

CVSSv2info

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VulDB Base Score: 🔍
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Exploitinginfo

Class: Null pointer dereference
CWE: CWE-476 / CWE-404
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 121505
Nessus Name: Slackware 14.2 : Slackware 14.2 kernel (SSA:2019-030-01)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

Interest: 🔍
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Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

Reaction Time: 🔍
0-Day Time: 🔍
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Timelineinfo

07/02/2018 🔍
07/26/2018 +23 days 🔍
07/27/2018 +1 days 🔍
07/27/2018 +0 days 🔍
07/27/2018 +0 days 🔍
07/27/2018 +0 days 🔍
01/30/2019 +187 days 🔍
01/31/2019 +1 days 🔍
04/27/2023 +1547 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: USN-3932-1⛔
Status: Confirmed

CVE: CVE-2018-14614 (🔍)
GCVE (CVE): GCVE-0-2018-14614
GCVE (VulDB): GCVE-100-122248
SecurityFocus: 104917 - Linux Kernel Multiple Denial of Service Vulnerabilities

See also: 🔍

Entryinfo

Created: 07/27/2018 07:58
Updated: 04/27/2023 08:38
Changes: 07/27/2018 07:58 (70), 03/10/2020 16:43 (9), 04/27/2023 08:38 (4)
Complete: 🔍
Cache ID: 216:B32:103

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