Stack-Based Buffer Overflow in X.Org X Server Affects Multiple Versions
CVE-2019-17624

7.8HIGH

Key Information:

Vendor

X.org

Status
X Server
Vendor
CVE Published:
16 October 2019

Badges

👾 Exploit Exists🟡 Public PoC🟣 EPSS 16%

What is CVE-2019-17624?

In X.Org X Server versions, including 1.20.4, a stack-based buffer overflow vulnerability has been identified in the XQueryKeymap function. This flaw allows attackers to send excessive input, causing a denial of service by crashing the application. There is some debate regarding the exact nature of the overflow, with possibilities of impacting systems in ways that are not yet fully specified.

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-2019-17624 - Proof of Concept

References

https://www.exploit-db.com/exploits/47507
x_refsource_MISC
https://www.x.org/releases/individual/xserver/
x_refsource_MISC
http://packetstormsecurity.com/files/154868/X.Org-X-Serve...
x_refsource_MISC

EPSS Score

16% chance of being exploited in the next 30 days.

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

.