Linux Kernel up to 4.13 net/sctp/socket.c sctp_do_peeloff System Calls use after free

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

Summaryinfo

A vulnerability, which was classified as critical, has been found in Linux Kernel up to 4.13. This affects the function sctp_do_peeloff of the file net/sctp/socket.c. Performing a manipulation as part of System Calls results in use after free. This vulnerability is known as CVE-2017-15115. Attacking locally is a requirement. No exploit is available. It is suggested to install a patch to address this issue.

Detailsinfo

A vulnerability, which was classified as critical, was found in Linux Kernel up to 4.13 (Operating System). This affects the function sctp_do_peeloff of the file net/sctp/socket.c. The manipulation as part of a System Calls leads to a use after free vulnerability. CWE is classifying the issue as CWE-416. Referencing memory after it has been freed can cause a program to crash, use unexpected values, or execute code. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

The sctp_do_peeloff function in net/sctp/socket.c in the Linux kernel before 4.14 does not check whether the intended netns is used in a peel-off action, which allows local users to cause a denial of service (use-after-free and system crash) or possibly have unspecified other impact via crafted system calls.

The bug was discovered 10/19/2017. The weakness was published 11/15/2017 by Yu Wang with Red Hat as confirmed git commit (GIT Repository). The advisory is shared at git.kernel.org. This vulnerability is uniquely identified as CVE-2017-15115 since 10/08/2017. An attack has to be approached locally. The successful exploitation needs a authentication. Technical details are known, but no exploit is available.

The vulnerability was handled as a non-public zero-day exploit for at least 27 days. During that time the estimated underground price was around $0-$5k. The vulnerability scanner Nessus provides a plugin with the ID 104710 (Fedora 25 : kernel (2017-1b4d140781)), 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 351152 (Amazon Linux Security Advisory for kernel: ALAS-2017-937).

Upgrading to version 4.14 eliminates this vulnerability. Applying a patch is able to eliminate this problem. The bugfix is ready for download at git.kernel.org. The best possible mitigation is suggested to be patching the affected component. A possible mitigation has been published 5 days after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at Tenable (104710) and SecurityFocus (BID 101877†). Similar entry is available at VDB-109424. Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

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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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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: 🔍

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Nessus ID: 104710
Nessus Name: Fedora 25 : kernel (2017-1b4d140781)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 865367
OpenVAS Name: Fedora Update for kernel FEDORA-2017-f73d3f1fc4
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

Interest: 🔍
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Countermeasuresinfo

Recommended: Patch
Status: 🔍

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

Upgrade: Kernel 4.14
Patch: git.kernel.org

Timelineinfo

10/08/2017 🔍
10/19/2017 +11 days 🔍
11/15/2017 +27 days 🔍
11/15/2017 +0 days 🔍
11/15/2017 +0 days 🔍
11/16/2017 +1 days 🔍
11/20/2017 +4 days 🔍
11/21/2017 +1 days 🔍
01/10/2023 +1876 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: FEDORA-2017-1b4d140781
Researcher: Yu Wang
Organization: Red Hat
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2017-15115 (🔍)
GCVE (CVE): GCVE-0-2017-15115
GCVE (VulDB): GCVE-100-109425
SecurityFocus: 101877 - Linux kernel CVE-2017-15115 Local Denial of Service Vulnerability

See also: 🔍

Entryinfo

Created: 11/16/2017 10:30
Updated: 01/10/2023 13:09
Changes: 11/16/2017 10:30 (83), 12/06/2019 16:36 (7), 01/10/2023 12:52 (4), 01/10/2023 13:01 (1), 01/10/2023 13:09 (1)
Complete: 🔍
Cache ID: 216::103

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

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