CVE-1999-0006

Buffer overflow in POP servers based on BSD/Qualcomm's qpopper allows remote attackers to gain root access using a long PASS command

Critical · published September 29, 1999

CVSS v3.1
9.8
EPSS
12%
Percentile
96.1
In the wild
Unconfirmed
What it is

🔥 A single long PASS command can give attackers root access to your server. This buffer overflow vulnerability in qpopper is like leaving the back door wide open for anyone to stroll in! Think of your POP server as a restaurant kitchen. Now, imagine someone walks in and orders an impossibly long dish, causing the chef to drop everything and let all the ingredients spill out — that’s what happens here when the buffer overflow occurs, allowing outsiders to access everything they shouldn't! An attacker can execute code with root privileges, which is absolutely devastating. They could manipulate your entire system, steal sensitive data, or even disable services. The consequences could range from a minor inconvenience to catastrophic data breaches.

Put simply

Think of your POP server as a restaurant kitchen. Now, imagine someone walks in and orders an impossibly long dish, causing the chef to drop everything and let all the ingredients spill out — that’s what happens here when the buffer overflow occurs, allowing outsiders to access everything they shouldn't! This vulnerability arises from improper bounds checking in the qpopper daemon, allowing an overly long PASS command to overflow the buffer and execute arbitrary code.

What to do

An attacker can execute code with root privileges, which is absolutely devastating. They could manipulate your entire system, steal sensitive data, or even disable services. The consequences could range from a minor inconvenience to catastrophic data breaches. Update qpopper to the latest patched version immediately to mitigate this vulnerability. If you can't patch right away, consider disabling remote access to POP services until the update is applied. Regularly audit your systems for similar outdated software. You've got this! Follow these steps, and you'll have your systems secured in no time. 🛡️

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
0.12124 · 96.1th percentile
Published
1999-09-29T04:00Z
EPSS history
Timeline
  • 29 SEP 04:00Z
    Buffer overflow in POP servers based on BSD/Qualcomm's qpopper allows remote attackers to gain root access using a long PASS command
    cvelistv5