Linux Kernel up to 4.5.1 ppp_generic.c ppp_register_net_channel/ppp_unregister_channel use after free
CVSS Meta Temp Score | Current Exploit Price (≈) | CTI Interest Score |
---|---|---|
7.6 | $0-$5k | 0.00 |
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 vulnerability database at Tenable (91884). Similar entries are available at 83139, 87126, 87304 and 87608.
Product
Type
Vendor
Name
Version
License
CPE 2.3
CPE 2.2
CVSSv4
VulDB CVSS-B Score: 🔍VulDB CVSS-BT Score: 🔍
VulDB Vector: 🔍
VulDB Reliability: 🔍
CVSSv3
VulDB Meta Base Score: 7.8VulDB 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: 🔍
CVSSv2
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VulDB Base Score: 🔍
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VulDB Reliability: 🔍
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Exploiting
Class: Use after freeCWE: CWE-416 / CWE-119
ATT&CK: Unknown
Local: Yes
Remote: No
Availability: 🔍
Status: Not defined
EPSS Score: 🔍
EPSS Percentile: 🔍
Price Prediction: 🔍
Current Price Estimation: 🔍
0-Day | unlock | unlock | unlock | unlock |
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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 Intelligence
Interest: 🔍Active Actors: 🔍
Active APT Groups: 🔍
Countermeasures
Recommended: UpgradeStatus: 🔍
Reaction Time: 🔍
0-Day Time: 🔍
Exposure Time: 🔍
Upgrade: Kernel 4.5.2
Patch: git.kernel.org
Timeline
05/11/2016 🔍05/15/2016 🔍
05/23/2016 🔍
05/23/2016 🔍
05/24/2016 🔍
06/27/2016 🔍
06/28/2016 🔍
08/22/2022 🔍
Sources
Vendor: kernel.orgAdvisory: USN-3021-1
Status: Not defined
Confirmation: 🔍
CVE: CVE-2016-4805 (🔍)
OVAL: 🔍
SecurityTracker: 1036763
SecurityFocus: 90605 - Linux kernel 'ppp_generic.c' Use After Free Denial of Service Vulnerability
See also: 🔍
Entry
Created: 05/24/2016 11:57Updated: 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: 🔍
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