CVE-2014-3591
Description
From CVE.org
Libgcrypt before 1.6.3 and GnuPG before 1.4.19 does not implement ciphertext blinding for Elgamal decryption, which allows physically proximate attackers to obtain the server's private key by determining factors using crafted ciphertext and the fluctuations in the electromagnetic field during multiplication.
Mitigation
In order to successfully exploit this flaw the attacker needs to following conditions:
1. They need to be very close to the system, in order to record the fluctuations in the electromagnetic waves being emitted by the system.
2. The attacker needs to send specially-crafted cipher text to the system for decryption.
3. The attacker needs to record the electromagnetic fluctuations when these cipher texts are being decrypted.
The above conditions can be true only when a laptop is being used for decryption in an unsafe external environment. Typical server setups may not be vulnerable.
Common Vulnerability Scoring System (CVSS) Score Details
Info alert:Important note
CVSS scores for open source components depend on vendor-specific factors (e.g. version or build chain). Therefore, Red Hat's score and impact rating can be different from NVD and other vendors. Red Hat remains the authoritative CVE Naming Authority (CNA) source for its products and services (see Red Hat classifications).
The following CVSS metrics and score provided are preliminary and subject to review.
CVSS v2 Score Breakdown
| Red Hat | NVD | cve.org | |
|---|---|---|---|
| Base Score | 1.2 | 1.9 | N/A |
| Attack Vector | Local | Local | N/A |
| Access Complexity | High | Medium | N/A |
| Authentication | None | None | N/A |
| Confidentiality Impact | Partial | Partial | N/A |
| Integrity Impact | None | None | N/A |
| Availability Impact | None | None | N/A |
Vector
Red Hat: AV:L/AC:H/Au:N/C:P/I:N/A:N
NVD: AV:L/AC:M/Au:N/C:P/I:N/A:N
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