Use-After-Free Vulnerability in Linux Kernel Affecting Multiple Versions
CVE-2019-8956

7.8HIGH

Key Information:

Vendor

Unknown

Status
Linux Kernel
Vendor
CVE Published:
1 April 2019

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2019-8956?

A use-after-free vulnerability exists in the Linux Kernel in versions prior to 4.20.8 and 4.19.21, specifically within the 'sctp_sendmsg()' function. This issue arises when handling the SCTP_SENDALL flag, allowing attackers to exploit the flaw to corrupt memory. Exploitation of this vulnerability can lead to unpredictable behavior and potential system instability, affecting the security and performance of affected systems.

Affected Version(s)

Linux Kernel 4.20.x prior to 4.20.8

Linux Kernel 4.19.x prior to 4.19.21

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2019-8956
Created by butterflyhack

References

https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4....
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https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4....
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https://secuniaresearch.flexerasoftware.com/secunia_resea...
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CVSS V3.1

Score:
7.8
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Local
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Unchanged

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

.