Linux Kernel up to 4.5.1 ppp_generic.c ppp_register_net_channel/ppp_unregister_channel use after free

CVSS Meta Temp Score
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CTI Interest Score
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7.6$0-$5k0.00

Summaryinfo

A vulnerability has been found in Linux Kernel up to 4.5.1 and classified as problematic. Affected by this vulnerability is the function ppp_register_net_channel/ppp_unregister_channel of the file drivers/net/ppp/ppp_generic.c. Performing a manipulation results in use after free. This vulnerability is known as CVE-2016-4805. Attacking locally is a requirement. No exploit is available. The affected component should be upgraded.

Detailsinfo

A vulnerability classified as critical has been found in Linux Kernel up to 4.5.1 (Operating System). This affects the function ppp_register_net_channel/ppp_unregister_channel of the file drivers/net/ppp/ppp_generic.c. The manipulation with an unknown input 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:

Use-after-free vulnerability in drivers/net/ppp/ppp_generic.c in the Linux kernel before 4.5.2 allows local users to cause a denial of service (memory corruption and system crash, or spinlock) or possibly have unspecified other impact by removing a network namespace, related to the ppp_register_net_channel and ppp_unregister_channel functions.

The weakness was published 05/23/2016 (Website). It is possible to read the advisory at github.com. This vulnerability is uniquely identified as CVE-2016-4805 since 05/15/2016. The exploitability is told to be easy. Attacking locally is a requirement. No form of authentication is needed for exploitation. Technical details of the vulnerability are known, but there is no available exploit.

The vulnerability scanner Nessus provides a plugin with the ID 91884 (Ubuntu 12.04 LTS : linux vulnerabilities (USN-3021-1)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Ubuntu Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 168927 (OpenSuSE Security Update for the Linux Kernel (openSUSE-SU-2016:1641-1)).

Upgrading to version 4.5.2 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 (91884) and SecurityFocus (BID 90605†). Similar entries are available at VDB-83139, VDB-87126, VDB-87304 and VDB-87608. Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.8
VulDB Meta Temp Score: 7.6

VulDB Base Score: 7.8
VulDB Temp Score: 7.5
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: 91884
Nessus Name: Ubuntu 12.04 LTS : linux vulnerabilities (USN-3021-1)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 850584
OpenVAS Name: SuSE Update for the openSUSE-SU-2016:2290-1 (Kernel)
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: 🔍

Upgrade: Kernel 4.5.2
Patch: git.kernel.org

Timelineinfo

05/11/2016 🔍
05/15/2016 +4 days 🔍
05/23/2016 +8 days 🔍
05/23/2016 +0 days 🔍
05/24/2016 +1 days 🔍
06/27/2016 +34 days 🔍
06/28/2016 +1 days 🔍
08/22/2022 +2246 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: USN-3021-1
Status: Not defined
Confirmation: 🔍

CVE: CVE-2016-4805 (🔍)
GCVE (CVE): GCVE-0-2016-4805
GCVE (VulDB): GCVE-100-87615

OVAL: 🔍

SecurityFocus: 90605 - Linux kernel 'ppp_generic.c' Use After Free Denial of Service Vulnerability
SecurityTracker: 1036763

See also: 🔍

Entryinfo

Created: 05/24/2016 11:57
Updated: 08/22/2022 09:28
Changes: 05/24/2016 11:57 (59), 12/12/2018 10:13 (24), 08/22/2022 09:28 (5)
Complete: 🔍
Cache ID: 216::103

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