Linux Kernel up to 4.14.8 Pointer kernel/bpf/verifier.c memory corruption
CVSS Meta Temp Score | Current Exploit Price (≈) | CTI Interest Score |
---|---|---|
6.4 | $0-$5k | 0.00 |
A vulnerability was found in Linux Kernel up to 4.14.8 (Operating System). It has been classified as critical. This affects some unknown functionality of the file kernel/bpf/verifier.c of the component Pointer Handler. The manipulation with an unknown input leads to a memory corruption vulnerability. CWE is classifying the issue as CWE-119. The product performs operations on a memory buffer, but it can read from or write to a memory location that is outside of the intended boundary of the buffer. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:
kernel/bpf/verifier.c in the Linux kernel through 4.14.8 allows local users to cause a denial of service (memory corruption) or possibly have unspecified other impact by leveraging improper use of pointers in place of scalars.
The bug was discovered 12/18/2017. The weakness was disclosed 12/27/2017 (Website). The advisory is shared at git.kernel.org. This vulnerability is uniquely identified as CVE-2017-17855 since 12/22/2017. An attack has to be approached locally. A authentication is required for exploitation. Technical details are known, but no exploit is available.
The vulnerability was handled as a non-public zero-day exploit for at least 9 days. During that time the estimated underground price was around $0-$5k. The vulnerability scanner Nessus provides a plugin with the ID 105596 (Fedora 26 : kernel (2018-8ed5eff2c0)), 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 277085 (Fedora Security Update for kernel (FEDORA-2018-22d5fa8a90) (Meltdown)).
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 (105596). The entries 111054, 111055, 111056 and 111058 are pretty similar.
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: 6.5VulDB Meta Temp Score: 6.4
VulDB Base Score: 5.3
VulDB Temp Score: 5.1
VulDB Vector: 🔍
VulDB Reliability: 🔍
NVD Base Score: 7.8
NVD Vector: 🔍
CVSSv2
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VulDB Base Score: 🔍
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Exploiting
Class: Memory corruptionCWE: 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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Nessus ID: 105596
Nessus Name: Fedora 26 : kernel (2018-8ed5eff2c0)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍
OpenVAS ID: 835155
OpenVAS Name: Fedora Update for kernel FEDORA-2018-22d5fa8a90
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
12/18/2017 🔍12/22/2017 🔍
12/27/2017 🔍
12/27/2017 🔍
12/28/2017 🔍
01/04/2018 🔍
01/05/2018 🔍
01/19/2023 🔍
Sources
Vendor: kernel.orgAdvisory: FEDORA-2018-8ed5eff2c0
Status: Not defined
CVE: CVE-2017-17855 (🔍)
See also: 🔍
Entry
Created: 12/28/2017 09:31Updated: 01/19/2023 09:07
Changes: 12/28/2017 09:31 (76), 12/18/2019 08:54 (3), 01/19/2023 09:04 (5), 01/19/2023 09:07 (1)
Complete: 🔍
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