Linux Kernel 3.x TCP Stack TCP SYN Packet resource management

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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6.0$0-$5k0.00

A vulnerability was found in Linux Kernel 3.x (Operating System) and classified as problematic. This issue affects an unknown part of the component TCP Stack. The manipulation as part of a TCP SYN Packet leads to a resource management vulnerability. Using CWE to declare the problem leads to CWE-399. Impacted is availability. The summary by CVE is:

The TCP stack in the Linux kernel 3.x does not properly implement a SYN cookie protection mechanism for the case of a fast network connection, which allows remote attackers to cause a denial of service (CPU consumption) by sending many TCP SYN packets, as demonstrated by an attack against the kernel-3.10.0 package in CentOS Linux 7.

The bug was discovered 02/12/2017. The weakness was presented 02/14/2017 (Website). The advisory is shared at cxsecurity.com. The identification of this vulnerability is CVE-2017-5972 since 02/12/2017. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. Technical details are unknown but a public exploit is available.

The exploit is available at exploit-db.com. It is declared as proof-of-concept. The vulnerability was handled as a non-public zero-day exploit for at least 2 days. During that time the estimated underground price was around $5k-$25k.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the vulnerability database at Exploit-DB (41350). See 96952 and 96951 for similar entries.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB CVSS-B Score: 🔍
VulDB CVSS-BT Score: 🔍
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CVSSv3info

VulDB Meta Base Score: 6.4
VulDB Meta Temp Score: 6.2

VulDB Base Score: 5.3
VulDB Temp Score: 5.0
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.5
NVD Vector: 🔍

CVSSv2info

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VulDB Base Score: 🔍
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Exploitinginfo

Class: Resource management
CWE: CWE-399 / CWE-404
ATT&CK: Unknown

Local: No
Remote: Yes

Availability: 🔍
Access: Public
Status: Proof-of-Concept
Download: 🔍

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Exploit-DB: 🔍

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
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Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍

Timelineinfo

02/12/2017 🔍
02/12/2017 +0 days 🔍
02/12/2017 +0 days 🔍
02/14/2017 +2 days 🔍
02/14/2017 +0 days 🔍
02/14/2017 +0 days 🔍
09/02/2020 +1296 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: cxsecurity.com
Status: Not defined

CVE: CVE-2017-5972 (🔍)
SecurityFocus: 96231 - Linux Kernel CVE-2017-5972 Denial of Service Vulnerability
OSVDB: - CVE-2017-5972 - Linux - Denial of Service Issue

scip Labs: https://www.scip.ch/en/?labs.20161013
See also: 🔍

Entryinfo

Created: 02/14/2017 16:21
Updated: 09/02/2020 10:31
Changes: 02/14/2017 16:21 (62), 09/02/2020 10:31 (7)
Complete: 🔍

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