Linux Kernel up to 4.11.1 IPX Interface net/ipx/af_ipx.c ipxitf_ioctl IOCTL Call use after free

CVSS Meta Temp Score
CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.
Current Exploit Price (≈)
Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.
CTI Interest Score
Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
6.4$0-$5k0.00

Summaryinfo

A vulnerability classified as critical has been found in Linux Kernel up to 4.11.1. Affected by this vulnerability is the function ipxitf_ioctl of the file net/ipx/af_ipx.c of the component IPX Interface. This manipulation as part of IOCTL Call causes use after free. This vulnerability appears as CVE-2017-7487. The attack requires local access. There is no available exploit. It is suggested to install a patch to address this issue.

Detailsinfo

A vulnerability classified as critical was found in Linux Kernel up to 4.11.1 (Operating System). Affected by this vulnerability is the function ipxitf_ioctl of the file net/ipx/af_ipx.c of the component IPX Interface. The manipulation as part of a IOCTL Call 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 confidentiality, integrity, and availability. The summary by CVE is:

The ipxitf_ioctl function in net/ipx/af_ipx.c in the Linux kernel through 4.11.1 mishandles reference counts, which allows local users to cause a denial of service (use-after-free) or possibly have unspecified other impact via a failed SIOCGIFADDR ioctl call for an IPX interface.

The bug was discovered 05/03/2017. The weakness was presented 05/14/2017 by Li Qiang with Qihoo 360 as confirmed git commit (GIT Repository). The advisory is shared at git.kernel.org. This vulnerability is known as CVE-2017-7487 since 04/05/2017. An attack has to be approached locally. Required for exploitation is a single authentication. Technical details are known, but no exploit is available.

The vulnerability was handled as a non-public zero-day exploit for at least 11 days. During that time the estimated underground price was around $0-$5k. The vulnerability scanner Nessus provides a plugin with the ID 100332 (Fedora 25 : kernel (2017-466d902289)), 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 176063 (Debian Security Update for Linux Kernel (DSA 3886-1) (Stack Clash)).

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 (100332) and SecurityFocus (BID 98439†). See VDB-101217, VDB-101218 and VDB-101819 for similar entries. Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Type

Vendor

Name

Version

License

Website

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

AVACAuCIA
💳💳💳💳💳💳
💳💳💳💳💳💳
💳💳💳💳💳💳
VectorComplexityAuthenticationConfidentialityIntegrityAvailability
UnlockUnlockUnlockUnlockUnlockUnlock
UnlockUnlockUnlockUnlockUnlockUnlock
UnlockUnlockUnlockUnlockUnlockUnlock

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

NVD Base Score: 🔍

Exploitinginfo

Class: Use after free
CWE: CWE-416 / CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: No

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-DayUnlockUnlockUnlockUnlock
TodayUnlockUnlockUnlockUnlock

Nessus ID: 100332
Nessus Name: Fedora 25 : kernel (2017-466d902289)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 867773
OpenVAS Name: Fedora Update for kernel FEDORA-2017-e75602d3ed
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Patch
Status: 🔍

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

Patch: git.kernel.org

Timelineinfo

04/05/2017 🔍
05/03/2017 +28 days 🔍
05/12/2017 +9 days 🔍
05/14/2017 +2 days 🔍
05/14/2017 +0 days 🔍
05/16/2017 +2 days 🔍
05/22/2017 +6 days 🔍
05/23/2017 +1 days 🔍
12/06/2022 +2023 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: FEDORA-2017-466d902289
Researcher: Li Qiang
Organization: Qihoo 360
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2017-7487 (🔍)
GCVE (CVE): GCVE-0-2017-7487
GCVE (VulDB): GCVE-100-101233

OVAL: 🔍

SecurityFocus: 98439
OSVDB: - CVE-2017-7487 - Linux - Use-After-Free Issue
SecurityTracker: 1039237

See also: 🔍

Entryinfo

Created: 05/16/2017 03:51
Updated: 12/06/2022 13:23
Changes: 05/16/2017 03:51 (83), 09/26/2020 14:43 (8), 12/23/2020 14:42 (2), 12/06/2022 13:17 (3), 12/06/2022 13:23 (1)
Complete: 🔍
Cache ID: 216::103

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Discussion

No comments yet. Languages: en.

Please log in to comment.

◂ PreviousOverviewNext ▸

Do you need the next level of professionalism?

Upgrade your account now!