CVE-2015-3193

HIGH
7.5
CVSS Score
Published: December 6, 2015 at 12:00 AM UTC
Updated: June 17, 2026 at 12:25 AM UTC
3 products affected across 3 vendorsUbuntu LinuxOpenSSLNode.js

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Severity
HIGH7.5
Exploit prediction
EPSS 25%

Description

The Montgomery squaring implementation in crypto/bn/asm/x86_64-mont5.pl in OpenSSL 1.0.2 before 1.0.2e on the x86_64 platform, as used by the BN_mod_exp function, mishandles carry propagation and produces incorrect output, which makes it easier for remote attackers to obtain sensitive private-key information via an attack against use of a (1) Diffie-Hellman (DH) or (2) Diffie-Hellman Ephemeral (DHE) ciphersuite.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

4.0.0 ≤ v ≤ 4.1.24.2.0 ≤ v < 4.2.35.0.0 ≤ v < 5.1.1
Affected range stops below 4.2.3, so it looks safe — our inference, not a vendor statement
Affected range stops below 5.1.1, so it looks safe — our inference, not a vendor statement

CVSS

Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
NONE
Availability
NONE
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-200

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