Linux Kernel 3.18/4.4/4.9/4.12 isdn_net.c strcpy memory corruption

CVSS Meta Temp Score
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CTI Interest Score
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8.4$0-$5k0.00

Summaryinfo

A vulnerability marked as critical has been reported in Linux Kernel 3.18/4.4/4.9/4.12. Affected by this vulnerability is the function strcpy of the file /drivers/isdn/i4l/isdn_net.c. This manipulation causes memory corruption. This vulnerability appears as CVE-2017-12762. The attack may be initiated remotely. There is no available exploit. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability classified as critical was found in Linux Kernel 3.18/4.4/4.9/4.12 (Operating System). Affected by this vulnerability is the function strcpy of the file /drivers/isdn/i4l/isdn_net.c. The manipulation with an unknown input leads to a memory corruption vulnerability. The CWE definition for the vulnerability is 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. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

In /drivers/isdn/i4l/isdn_net.c: A user-controlled buffer is copied into a local buffer of constant size using strcpy without a length check which can cause a buffer overflow. This affects the Linux kernel 4.9-stable tree, 4.12-stable tree, 3.18-stable tree, and 4.4-stable tree.

The bug was discovered 08/09/2017. The weakness was presented 08/09/2017 (Website). The advisory is shared at securityfocus.com. This vulnerability is known as CVE-2017-12762 since 08/09/2017. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. Technical details are known, but no exploit is available.

The vulnerability scanner Nessus provides a plugin with the ID 102997 (EulerOS 2.0 SP1 : kernel (EulerOS-SA-2017-1159)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Huawei Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 351447 (Amazon Linux Security Advisory for kernel: ALAC2012-2018-013).

Upgrading eliminates this vulnerability. A possible mitigation has been published even before and not after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at Tenable (102997) and SecurityFocus (BID 100251†). See VDB-102802, VDB-103034, VDB-104449 and VDB-104864 for similar entries. 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: 8.5
VulDB Meta Temp Score: 8.4

VulDB Base Score: 7.3
VulDB Temp Score: 7.0
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 9.8
NVD Vector: 🔍

CVSSv2info

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VulDB Base Score: 🔍
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Exploitinginfo

Class: Memory corruption
CWE: CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 102997
Nessus Name: EulerOS 2.0 SP1 : kernel (EulerOS-SA-2017-1159)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 841810
OpenVAS Name: Ubuntu Update for linux-lts-xenial USN-3420-2
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
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Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Timelineinfo

08/05/2017 🔍
08/09/2017 +4 days 🔍
08/09/2017 +0 days 🔍
08/09/2017 +0 days 🔍
08/09/2017 +0 days 🔍
08/09/2017 +0 days 🔍
08/10/2017 +1 days 🔍
09/08/2017 +29 days 🔍
12/15/2022 +1924 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: USN-3620-1⛔
Status: Not defined

CVE: CVE-2017-12762 (🔍)
GCVE (CVE): GCVE-0-2017-12762
GCVE (VulDB): GCVE-100-105193
SecurityFocus: 100251 - Linux kernel CVE-2017-12762 Local Buffer Overflow Vulnerability

See also: 🔍

Entryinfo

Created: 08/10/2017 08:47
Updated: 12/15/2022 15:29
Changes: 08/10/2017 08:47 (74), 11/06/2019 08:41 (5), 12/15/2022 15:29 (4)
Complete: 🔍
Cache ID: 216::103

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

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