Linux Kernel up to 4.14.4 Access Restriction net/netfilter/xt_osf.c 7pk security

CVSS Meta Temp Score
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CTI Interest Score
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6.4$0-$5k0.00

Summaryinfo

A vulnerability has been found in Linux Kernel up to 4.14.4 and classified as problematic. Affected by this issue is some unknown functionality of the file net/netfilter/xt_osf.c of the component Access Restriction. The manipulation leads to 7pk security. This vulnerability is traded as CVE-2017-17450. An attack has to be approached locally. There is no exploit available. The affected component should be upgraded.

Detailsinfo

A vulnerability was found in Linux Kernel up to 4.14.4 (Operating System) and classified as problematic. This issue affects an unknown part of the file net/netfilter/xt_osf.c of the component Access Restriction. The manipulation with an unknown input leads to a 7pk security vulnerability. Using CWE to declare the problem leads to CWE-254. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

net/netfilter/xt_osf.c in the Linux kernel through 4.14.4 does not require the CAP_NET_ADMIN capability for add_callback and remove_callback operations, which allows local users to bypass intended access restrictions because the xt_osf_fingers data structure is shared across all net namespaces.

The bug was discovered 12/05/2017. The weakness was shared 12/07/2017 by ERNE (Website). The advisory is shared at securityfocus.com. The identification of this vulnerability is CVE-2017-17450 since 12/06/2017. An attack has to be approached locally. A simple authentication is necessary for exploitation. Technical details are known, but no exploit is available. MITRE ATT&CK project uses the attack technique T1211 for this issue.

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 105383 (Fedora 26 : kernel (2017-ba6b6e71f7)), 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 390165 (Oracle VM Server for x86 Security Update for Unbreakable Enterprise kernel (OVMSA-2019-0002)).

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 databases at Tenable (105383) and SecurityFocus (BID 102110†). The entries VDB-110307, VDB-110308 and VDB-110520 are related to this item. If you want to get the best quality for vulnerability data then you always have to consider VulDB.

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.5
VulDB 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: 🔍

CVSSv2info

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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
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Exploitinginfo

Class: 7pk security
CWE: CWE-254
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: 105383
Nessus Name: Fedora 26 : kernel (2017-ba6b6e71f7)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 831051
OpenVAS Name: Fedora Update for kernel FEDORA-2017-129969aa8a
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

Interest: 🔍
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Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

Reaction Time: 🔍
0-Day Time: 🔍
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Timelineinfo

12/05/2017 🔍
12/05/2017 +0 days 🔍
12/06/2017 +1 days 🔍
12/06/2017 +0 days 🔍
12/07/2017 +1 days 🔍
12/07/2017 +0 days 🔍
12/19/2017 +12 days 🔍
12/20/2017 +1 days 🔍
01/17/2023 +1854 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: FEDORA-2017-ba6b6e71f7⛔
Researcher: ERNE
Status: Confirmed

CVE: CVE-2017-17450 (🔍)
GCVE (CVE): GCVE-0-2017-17450
GCVE (VulDB): GCVE-100-110309

OVAL: 🔍

SecurityFocus: 102110 - Linux Kernel '/netfilter/xt_osf.c' Local Security Bypass Vulnerability

See also: 🔍

Entryinfo

Created: 12/07/2017 08:07
Updated: 01/17/2023 09:20
Changes: 12/07/2017 08:07 (79), 12/12/2019 16:14 (6), 01/17/2023 09:18 (4), 01/17/2023 09:20 (1)
Complete: 🔍
Cache ID: 216:ED6:103

If you want to get the best quality for vulnerability data then you always have to consider VulDB.

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