CVE-2024-13176

MEDIUM 1 PoC
MEDIUM Priority: 0.03 BB Relevance: 54/100
Published: 2025-01-20 Modified: 2026-11-09 First seen: 2026-11-06 Status: active

Attack Surface

Low Complexity No Auth No Interaction Conf. Impact

CVSS Vector Breakdown

AV: Physical
AC: Low
PR: None
UI: None
S: Unchanged
C: High
I: None
A: None

Description

Issue summary: A timing side-channel which could potentially allow recovering the private key exists in the ECDSA signature computation. Impact summary: A timing side-channel in ECDSA signature computations could allow recovering the private key by an attacker. However, measuring the timing would require either local access to the signing application or a very fast network connection with low latency. There is a timing signal of around 300 nanoseconds when the top word of the inverted ECDSA nonce value is zero. This can happen with significant probability only for some of the supported elliptic curves. In particular the NIST P-521 curve is affected. To be able to measure this leak, the attacker process must either be located in the same physical computer or must have a very fast network connection with low latency. For that reason the severity of this vulnerability is Low. The FIPS modules in 3.4, 3.3, 3.2, 3.1 and 3.0 are affected by this issue.

Weakness Classification (1)

Bug Bounty Relevance

54 / 100
✓ No authentication
✓ Low complexity
✓ No user interaction
✓ PoC available (1)

CVSS Score

4.6 / 10.0 v3.1
CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

EPSS — Exploitation Probability

0.75%
Raw Score 0.007490
Percentile 55.4%
Date 2026-11-12

EPSS Trend

2026-11-12
0.00749
2026-11-10
0.00776
2026-11-09
0.00644
2026-11-08
0.00644
2026-11-07
0.00644
2026-11-06
0.00609

Intelligence Sources

mitre ref →
nvd ref →