CVE-2019-18634

7.8HIGH

Key Information:

Vendor
Sudo Project
Status
Sudo
Vendor
CVE Published:
29 January 2020

Badges

👾 Exploit Exists🟡 Public PoC

Summary

In Sudo before 1.8.26, if pwfeedback is enabled in /etc/sudoers, users can trigger a stack-based buffer overflow in the privileged sudo process. (pwfeedback is a default setting in Linux Mint and elementary OS; however, it is NOT the default for upstream and many other packages, and would exist only if enabled by an administrator.) The attacker needs to deliver a long string to the stdin of getln() in tgetpass.c.

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.

sudo-cve-2019-18634
Created by saleemrashid

CVE-2019-18634
Created by Plazmaz

CVE-2019-18634
Created by aesophor

References

https://support.apple.com/kb/HT210919
x_refsource_CONFIRM
https://seclists.org/bugtraq/2020/Jan/44
mailing-listx_refsource_BUGTRAQ
https://www.sudo.ws/security.html
x_refsource_MISC

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

.