CVE-2017-12893

The SMB/CIFS parser in tcpdump before 4.9.2 has a buffer over-read in smbutil.c:name_len()

Critical · published September 14, 2017

CVSS v3.1
9.8
EPSS
2%
Percentile
83.8
In the wild
Unconfirmed
What it is

🚨 A sneaky buffer over-read in tcpdump's SMB/CIFS parser could expose sensitive data, leaving your system vulnerable! 🔥 Think of it like a delivery service that looks into packages without properly checking the labels — they might reveal things they shouldn’t, like personal information or secrets. This over-read means data can spill out unintentionally, just like a careless unpacking! An attacker could potentially harvest sensitive information from the system's memory, leading to privacy breaches or data leakage. With a CVSS score of 9.8, the potential fallout is absolutely devastating, putting your network security at serious risk!

Put simply

Think of it like a delivery service that looks into packages without properly checking the labels — they might reveal things they shouldn’t, like personal information or secrets. This over-read means data can spill out unintentionally, just like a careless unpacking! The vulnerability exists in the SMB/CIFS parsing within tcpdump before version 4.9.2, allowing for a buffer over-read during name length calculations. This issue arises because the parser doesn't properly validate the boundaries, allowing unintended memory exposure.

What to do

An attacker could potentially harvest sensitive information from the system's memory, leading to privacy breaches or data leakage. With a CVSS score of 9.8, the potential fallout is absolutely devastating, putting your network security at serious risk! Upgrade tcpdump to version 4.9.2 or newer immediately to close this critical vulnerability. Ensure that your current version is patched, and conduct a thorough audit of your network monitoring tools to mitigate any risks. You've got this! With these steps, your system will be safer 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
0.02389 · 83.8th percentile
Published
2017-09-14T06:00Z
EPSS history
Timeline
  • 14 SEP 06:00Z
    The SMB/CIFS parser in tcpdump before 4.9.2 has a buffer over-read in smbutil.c:name_len()
    cvelistv5