CVE-2015-8803

The ecc_256_modp function in ecc-256.c in Nettle before 3.2 does not properly handle carry propagation and produces incorrect output in its implementation of…

published February 23, 2016

CVSS
—
EPSS
4%
Percentile
90.9
In the wild
Unconfirmed
What it is

⚠️ A quirky oversight in the ecc_256_modp function could lead to mysterious miscalculations! Think of it as a recipe that forgets a key ingredient, throwing off the final dish. 🍽️ This vulnerability is like a delivery service that miscalculates the weight of packages — it could lead to a variety of mishaps down the line, impacting how deliveries are managed and received. If the system doesn't handle carry properly, every calculation could veer off course, causing unpredictable results. An attacker could potentially exploit this incorrect output to create unforeseen issues, though the exact nature of the impact remains unspecified. While no known attacks are currently exploiting this flaw, the consequences could range from data integrity problems to unpredictable behavior in systems relying on accurate elliptic curve calculations.

Put simply

This vulnerability is like a delivery service that miscalculates the weight of packages — it could lead to a variety of mishaps down the line, impacting how deliveries are managed and received. If the system doesn't handle carry properly, every calculation could veer off course, causing unpredictable results. This vulnerability arises in the implementation of the P-256 NIST elliptic curve in Nettle versions prior to 3.2. The ecc_256_modp function fails to handle carry propagation correctly, leading to incorrect outputs during computations, which could be leveraged for various exploits, although specifics are unclear.

What to do

An attacker could potentially exploit this incorrect output to create unforeseen issues, though the exact nature of the impact remains unspecified. While no known attacks are currently exploiting this flaw, the consequences could range from data integrity problems to unpredictable behavior in systems relying on accurate elliptic curve calculations. To protect your systems, update Nettle to version 3.2 or later as soon as possible. Review your elliptic curve implementations and ensure they are using the most recent stable releases to avoid potential pitfalls. Staying informed about library updates is crucial! You've got this! By updating your components, you're taking a proactive step towards securing your systems! 🛡️

The record
Technical detail
CVSS
Not scored
CVSS v4.0
Not supplied
EPSS
0.04212 · 90.9th percentile
Published
2016-02-23T19:00Z
EPSS history
Timeline
  • 23 FEB 19:00Z
    The ecc_256_modp function in ecc-256.c in Nettle before 3.2 does not properly handle carry propagation and produces incorrect output in its implementation of…
    cvelistv5