CVE-2009-0939

Tor before 0.2.0.34 treats incomplete IPv4 addresses as valid, which has unknown impact and attack vectors related to "Spec conformance," as demonstrated using…

published March 18, 2009

CVSS
—
EPSS
2%
Percentile
81.1
In the wild
Unconfirmed
What it is

⚠️ An incomplete IPv4 address is being accepted as valid by Tor before version 0.2.0.34! It's like a restaurant taking an order without asking for a full dish description – could lead to a mix-up! Picture a delivery service that accepts vague addresses like '123 Main St' instead of a full zip code. This could lead to packages delivered to the wrong place, or even worse, never delivered at all! While the severity is unknown, an attacker could potentially exploit this flaw in unpredictable ways, possibly impacting network routing or anonymity. The consequences could range from disrupted connections to compromising user privacy, making this a situation worth keeping an eye on!

Put simply

Picture a delivery service that accepts vague addresses like '123 Main St' instead of a full zip code. This could lead to packages delivered to the wrong place, or even worse, never delivered at all! The vulnerability exists because Tor mistakenly accepts incomplete IPv4 addresses as valid, which may lead to unexpected behavior or security implications due to spec conformance issues.

What to do

While the severity is unknown, an attacker could potentially exploit this flaw in unpredictable ways, possibly impacting network routing or anonymity. The consequences could range from disrupted connections to compromising user privacy, making this a situation worth keeping an eye on! To safeguard your Tor services, update to version 0.2.0.34 or later to address this vulnerability. Regularly check for updates and stay informed about future releases to ensure your anonymity remains intact. You've got this! Stay vigilant and keep your Tor up to date for secure browsing. 🛡️

The record
Technical detail
CVSS
Not scored
CVSS v4.0
Not supplied
EPSS
0.02050 · 81.1th percentile
Published
2009-03-18T01:00Z
EPSS history
Timeline
  • 18 MAR 01:00Z
    Tor before 0.2.0.34 treats incomplete IPv4 addresses as valid, which has unknown impact and attack vectors related to "Spec conformance," as demonstrated using…
    cvelistv5