Linux Kernel on Ubuntu Linux Image Package 4.8.0.41.52 xfrm_replay_verify_len access control

CVSS Meta Temp Score
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CTI Interest Score
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7.5$0-$5k0.00

Summaryinfo

A vulnerability labeled as problematic has been found in Linux Kernel on Ubuntu. This affects the function xfrm_replay_verify_len of the component Linux Image Package 4.8.0.41.52. Such manipulation leads to access control. This vulnerability is documented as CVE-2017-7184. The attack needs to be performed locally. There is not any exploit available. It is advisable to implement a patch to correct this issue.

Detailsinfo

A vulnerability was found in Linux Kernel on Ubuntu (Operating System) (the affected version unknown) and classified as critical. Affected by this issue is the function xfrm_replay_verify_len of the component Linux Image Package 4.8.0.41.52. The manipulation with an unknown input leads to a access control vulnerability. Using CWE to declare the problem leads to CWE-264. Impacted is confidentiality, integrity, and availability. CVE summarizes:

The linux-image-* package 4.8.0.41.52 for the Linux kernel on Ubuntu 16.10 allows local users to obtain root privileges or cause a denial of service (heap-based out-of-bounds access) via unspecified vectors, as demonstrated during a Pwn2Own competition at CanSecWest 2017.

The bug was discovered 03/16/2017. The weakness was released 03/19/2017 as confirmed git commit (GIT Repository) via Pwn2Own. The advisory is shared for download at git.kernel.org. This vulnerability is handled as CVE-2017-7184 since 03/19/2017. The attack needs to be approached locally. A simple authentication is necessary for exploitation. There are known technical details, but no exploit is available. The MITRE ATT&CK project declares the attack technique as T1068.

The vulnerability was handled as a non-public zero-day exploit for at least 3 days. During that time the estimated underground price was around $5k-$25k. The vulnerability scanner Nessus provides a plugin with the ID 99038 (Amazon Linux AMI : kernel (ALAS-2017-811)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Amazon Linux Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 169833 (SUSE Enterprise Linux Security Update for the Linux Kernel (SUSE-SU-2017:0865-1)).

Applying a patch is able to eliminate this problem. The bugfix is ready for download at git.kernel.org. A possible mitigation has been published 2 weeks after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at Tenable (99038), SecurityFocus (BID 97018†) and SecurityTracker (ID 1038166†). Once again VulDB remains the best source for vulnerability data.

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.8
VulDB Meta Temp Score: 7.6

VulDB Base Score: 7.8
VulDB Temp Score: 7.5
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.8
NVD Vector: 🔍

CVSSv2info

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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Access control
CWE: CWE-264
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: No

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 99038
Nessus Name: Amazon Linux AMI : kernel (ALAS-2017-811)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 867773
OpenVAS Name: Fedora Update for kernel FEDORA-2017-93dec9eba5
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

Interest: 🔍
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Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Patch
Status: 🔍

Reaction Time: 🔍
0-Day Time: 🔍
Exposure Time: 🔍

Patch: git.kernel.org

Timelineinfo

03/16/2017 🔍
03/16/2017 +0 days 🔍
03/19/2017 +3 days 🔍
03/19/2017 +0 days 🔍
03/19/2017 +0 days 🔍
03/20/2017 +1 days 🔍
03/29/2017 +9 days 🔍
03/30/2017 +1 days 🔍
03/30/2017 +0 days 🔍
09/10/2020 +1260 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: git.kernel.org
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2017-7184 (🔍)
GCVE (CVE): GCVE-0-2017-7184
GCVE (VulDB): GCVE-100-98276
SecurityFocus: 97018 - Linux Kernel CVE-2017-7184 Local Privilege Escalation Vulnerability
OSVDB: - CVE-2017-7184 - Linux - Out-of-Bounds Access Issue
SecurityTracker: 1038166

Entryinfo

Created: 03/20/2017 07:49
Updated: 09/10/2020 09:28
Changes: 03/20/2017 07:49 (84), 09/10/2020 09:28 (6)
Complete: 🔍
Cache ID: 216::103

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