CVE-2017-8816

The NTLM authentication feature in curl and libcurl before 7.57.0 on 32-bit platforms allows attackers to cause a denial of service (integer overflow and…

Critical · published November 29, 2017

CVSS v3.1
9.8
EPSS
9%
Percentile
95.0
In the wild
Unconfirmed
What it is

🚨 A long username or password could crash your curl and libcurl applications! With the NTLM authentication feature, this vulnerability lets attackers cause a denial of service and wreak havoc with overflowing data. 🔥 Think of it like a restaurant with a seating chart that can only handle a certain number of guests. If someone tries to squeeze in too many people at a single table, it can lead to chaos — plates flying and diners spilling out everywhere! This flaw allows data to overflow and crash the system like a crowded restaurant on a busy night. An attacker could exploit this vulnerability to send long usernames and passwords, triggering an integer overflow. This could result in a buffer overflow that crashes the application, causing a denial of service and potentially leaving your systems vulnerable to other impacts. Imagine the chaos if your application just stops working in the middle of critical operations!

Put simply

Think of it like a restaurant with a seating chart that can only handle a certain number of guests. If someone tries to squeeze in too many people at a single table, it can lead to chaos — plates flying and diners spilling out everywhere! This flaw allows data to overflow and crash the system like a crowded restaurant on a busy night. This vulnerability exists in the NTLM authentication feature of curl and libcurl versions prior to 7.57.0 on 32-bit platforms. The flaw allows an integer overflow which can lead to a buffer overflow and application crash when processing excessively long user credentials.

What to do

An attacker could exploit this vulnerability to send long usernames and passwords, triggering an integer overflow. This could result in a buffer overflow that crashes the application, causing a denial of service and potentially leaving your systems vulnerable to other impacts. Imagine the chaos if your application just stops working in the middle of critical operations! Upgrade curl and libcurl to version 7.57.0 or later to patch this vulnerability immediately. Additionally, ensure input validation is in place for usernames and passwords to prevent potential exploits. Regularly audit your systems to ensure they are running the most secure versions available. You’ve got this! With the right updates and precautions, you can keep your applications running smoothly and securely! 🛡️

The record
Technical detail
CVSS v3.1
9.8 · CRITICAL
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.08523 · 95.0th percentile
Published
2017-11-29T18:00Z
EPSS history
Timeline
  • 29 NOV 18:00Z
    The NTLM authentication feature in curl and libcurl before 7.57.0 on 32-bit platforms allows attackers to cause a denial of service (integer overflow and…
    cvelistv5