Linux Kernel up to 4.14.13 drivers/block/loop.c __lock_acquire use after free
CVSS Meta Temp Score | Current Exploit Price (≈) | CTI Interest Score |
---|---|---|
5.5 | $0-$5k | 0.00 |
A vulnerability was found in Linux Kernel up to 4.14.13 (Operating System). It has been declared as problematic. Affected by this vulnerability is the function __lock_acquire
of the file drivers/block/loop.c. The manipulation with an unknown input leads to a use after free vulnerability. The CWE definition for the vulnerability is CWE-416. Referencing memory after it has been freed can cause a program to crash, use unexpected values, or execute code. As an impact it is known to affect availability. The summary by CVE is:
In the Linux kernel through 4.14.13, drivers/block/loop.c mishandles lo_release serialization, which allows attackers to cause a denial of service (__lock_acquire use-after-free) or possibly have unspecified other impact.
The bug was discovered 01/11/2018. The weakness was presented 01/12/2018 (Website). It is possible to read the advisory at git.kernel.org. This vulnerability is known as CVE-2018-5344 since 01/11/2018. The exploitation appears to be easy. Attacking locally is a requirement. The exploitation doesn't need any form of authentication. 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 1 days. During that time the estimated underground price was around $0-$5k. The vulnerability scanner Nessus provides a plugin with the ID 106280 (Fedora 26 : kernel (2018-8dc60a4feb)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Fedora Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 237034 (Red Hat Update for kernel-alt (RHSA-2018:2948)).
Upgrading eliminates this vulnerability. A possible mitigation has been published 2 weeks after the disclosure of the vulnerability.
The vulnerability is also documented in the vulnerability database at Tenable (106280). See 109193, 110288, 110931 and 110932 for similar entries.
Product
Type
Vendor
Name
Version
License
CPE 2.3
CPE 2.2
CVSSv4
VulDB CVSS-B Score: 🔍VulDB CVSS-BT Score: 🔍
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CVSSv3
VulDB Meta Base Score: 5.5VulDB Meta Temp Score: 5.5
VulDB Base Score: 3.3
VulDB Temp Score: 3.2
VulDB Vector: 🔍
VulDB Reliability: 🔍
NVD Base Score: 7.8
NVD Vector: 🔍
CVSSv2
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Exploiting
Class: Use after freeCWE: CWE-416 / CWE-119
ATT&CK: Unknown
Local: Yes
Remote: No
Availability: 🔍
Status: Not defined
EPSS Score: 🔍
EPSS Percentile: 🔍
Price Prediction: 🔍
Current Price Estimation: 🔍
0-Day | unlock | unlock | unlock | unlock |
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Today | unlock | unlock | unlock | unlock |
Nessus ID: 106280
Nessus Name: Fedora 26 : kernel (2018-8dc60a4feb)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍
OpenVAS ID: 864875
OpenVAS Name: Ubuntu Update for linux USN-3583-1
OpenVAS File: 🔍
OpenVAS Family: 🔍
Qualys ID: 🔍
Qualys Name: 🔍
Threat Intelligence
Interest: 🔍Active Actors: 🔍
Active APT Groups: 🔍
Countermeasures
Recommended: UpgradeStatus: 🔍
Reaction Time: 🔍
0-Day Time: 🔍
Exposure Time: 🔍
Patch: git.kernel.org
Timeline
01/06/2018 🔍01/11/2018 🔍
01/11/2018 🔍
01/12/2018 🔍
01/12/2018 🔍
01/13/2018 🔍
01/23/2018 🔍
01/24/2018 🔍
01/20/2023 🔍
Sources
Vendor: kernel.orgAdvisory: FEDORA-2018-8dc60a4feb
Researcher: Fan Longfei
Status: Confirmed
CVE: CVE-2018-5344 (🔍)
SecurityFocus: 102503 - Linux Kernel 'drivers/block/loop.c' Local Denial of Service Vulnerability
See also: 🔍
Entry
Created: 01/13/2018 11:54Updated: 01/20/2023 18:13
Changes: 01/13/2018 11:54 (77), 12/23/2019 07:58 (5), 01/30/2021 07:20 (3), 01/20/2023 18:06 (4), 01/20/2023 18:13 (1)
Complete: 🔍
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