Linux Kernel up to 4.2.3 Slot Number drivers/net/slip/slhc.c slhc_init PPPIOCSMAXCID null pointer dereference

CVSS Meta Temp Score
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CTI Interest Score
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5.6$0-$5k0.00

Summaryinfo

A vulnerability, which was classified as problematic, has been found in Linux Kernel up to 4.2.3. Affected by this issue is the function slhc_init of the file drivers/net/slip/slhc.c of the component Slot Number Handler. This manipulation of the argument PPPIOCSMAXCID as part of IOCTL causes null pointer dereference. This vulnerability is handled as CVE-2015-7799. It is possible to launch the attack on the local host. There is not any exploit available. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability was found in Linux Kernel up to 4.2.3 (Operating System). It has been declared as problematic. Affected by this vulnerability is the function slhc_init of the file drivers/net/slip/slhc.c of the component Slot Number Handler. The manipulation of the argument PPPIOCSMAXCID as part of a IOCTL leads to a null pointer dereference vulnerability. The CWE definition for the vulnerability is CWE-476. A NULL pointer dereference occurs when the application dereferences a pointer that it expects to be valid, but is NULL, typically causing a crash or exit. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

The slhc_init function in drivers/net/slip/slhc.c in the Linux kernel through 4.2.3 does not ensure that certain slot numbers are valid, which allows local users to cause a denial of service (NULL pointer dereference and system crash) via a crafted PPPIOCSMAXCID ioctl call.

The weakness was released 10/19/2015 (Website). The advisory is shared at code.google.com. This vulnerability is known as CVE-2015-7799 since 10/09/2015. The exploitation appears to be easy. An attack has to be approached locally. 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 87265 (Debian DLA-360-1 : linux-2.6 security update), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Debian Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 168771 (SUSE Enterprise Linux Security update for the Linux Kernel (SUSE-SU-2016:1203-1)).

Upgrading eliminates this vulnerability. A possible mitigation has been published 2 months after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at Tenable (87265), SecurityFocus (BID 77033†) and Vulnerability Center (SBV-54100†). Entries connected to this vulnerability are available at VDB-8569, VDB-79223, VDB-79228 and VDB-79331. 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: 5.8
VulDB Meta Temp Score: 5.6

VulDB Base Score: 5.8
VulDB Temp Score: 5.6
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

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

NVD Base Score: 🔍

Exploitinginfo

Class: Null pointer dereference
CWE: CWE-476 / CWE-404
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: 87265
Nessus Name: Debian DLA-360-1 : linux-2.6 security update
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 703426
OpenVAS Name: Debian Security Advisory DSA 3426-1 (linux - security update)
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

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

Timelineinfo

10/09/2015 🔍
10/19/2015 +10 days 🔍
10/19/2015 +0 days 🔍
10/19/2015 +0 days 🔍
10/20/2015 +1 days 🔍
11/02/2015 +13 days 🔍
12/08/2015 +36 days 🔍
12/09/2015 +1 days 🔍
06/22/2022 +2387 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: USN-2841-1
Status: Not defined
Confirmation: 🔍

CVE: CVE-2015-7799 (🔍)
GCVE (CVE): GCVE-0-2015-7799
GCVE (VulDB): GCVE-100-78541

OVAL: 🔍

SecurityFocus: 77033
SecurityTracker: 1033809
Vulnerability Center: 54100 - Linux Kernel through 4.2.3 Local DoS via a Crafted PPPIOCSMAXCID Ioctl Call, Medium

See also: 🔍

Entryinfo

Created: 10/20/2015 10:11
Updated: 06/22/2022 10:04
Changes: 10/20/2015 10:11 (64), 03/09/2018 10:39 (15), 06/22/2022 10:04 (3)
Complete: 🔍
Cache ID: 216:A8D:103

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