CVE-2020-12740

tcprewrite in Tcpreplay through 4.3.2 has a heap-based buffer over-read during a get_c operation

published May 8, 2020

CVSS
—
EPSS
2%
Percentile
76.9
In the wild
Unconfirmed
What it is

⚠️ A sneaky heap-based buffer over-read has crawled into tcprewrite, and it could leave your network data vulnerable! Think of this as a delivery service that accidentally opens and checks some packages without verifying the contents – you might end up with sensitive information exposed. In this case, tcprewrite is examining data without all the necessary checks, leading to potential leaks of your precious data! While not widely exploited, this vulnerability could still lead to unauthorized access to sensitive network data during processing. An attacker could potentially glean information that should remain private, which could be absolutely devastating for security and privacy!

Put simply

Think of this as a delivery service that accidentally opens and checks some packages without verifying the contents – you might end up with sensitive information exposed. In this case, tcprewrite is examining data without all the necessary checks, leading to potential leaks of your precious data! The issue arises in the `get_c` operation in tcprewrite's handling of IPv6 data during a heap-based buffer over-read. This means that while the system reads what it shouldn't, it could leak sensitive information into memory that can be accessed by malicious actors.

What to do

While not widely exploited, this vulnerability could still lead to unauthorized access to sensitive network data during processing. An attacker could potentially glean information that should remain private, which could be absolutely devastating for security and privacy! To secure your systems, update tcpreplay to the latest version, as this issue was addressed in version 4.3.2. Be sure to audit your network configurations and monitor for any unusual access patterns as an additional layer of protection! You've got this! With these steps, you'll be well on your way to locking down your network. 🛡️

The record
Technical detail
CVSS
Not scored
CVSS v4.0
Not supplied
EPSS
0.01693 · 76.9th percentile
Published
2020-05-08T17:03Z
EPSS history
Timeline
  • 08 MAY 17:03Z
    tcprewrite in Tcpreplay through 4.3.2 has a heap-based buffer over-read during a get_c operation
    cvelistv5