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CVE-2014-3591

14
FAUCET Score

CVE-2014-3591 describes a vulnerability in Libgcrypt before 1.6.3 and GnuPG before 1.4.19, where the lack of ciphertext blinding for Elgamal decryption allows physically proximate attackers to extract the server's private key. This medium-severity vulnerability (CVSS 4.2) requires physical access and high attack complexity, but could lead to a complete compromise of confidentiality. There is no evidence of active exploitation, public exploit code, or significant community discussion surrounding this decade-old flaw.

Impacted Technologies

VendorProductVersion(s)CPE
< 1.4.19CPE matchmatch criteria
cpe:2.3:a:gnupg:gnupg:*:*:*:*:*:*:*:*
< 1.6.3CPE matchmatch criteria
cpe:2.3:a:gnupg:libgcrypt:*:*:*:*:*:*:*:*
7.0CPE matchmatch criteria
cpe:2.3:o:debian:debian_linux:7.0:*:*:*:*:*:*:*
8.0CPE matchmatch criteria
cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

4.2MEDIUM

CVSS:3.1/AV:P/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N

Attack Vector
PHYSICAL
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
NONE
Exploitability Score
0.5
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.58%
Probability of exploitation in next 30 days
EPSS Percentile
44.0%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0058 is in the 90th percentile among its peer group of 152 CVEs.

Social Chatter

No social media mentions found for this CVE.

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.2 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Vendor Patches (8)

redhatvendor investigatingvia redhat_api
Product: Red Hat Enterprise Virtualization 3Fixed in: mingw-virt-viewer
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 5Fixed in: gnupg2
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 5Fixed in: libgcrypt
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 6Fixed in: gnupg2
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 5Fixed in: gnupg
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: gnupg2
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: libgcrypt
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 6Fixed in: libgcrypt

Vendor Advisories (1)

redhatCVE-2014-3591Low

libgcrypt: use ciphertext blinding for Elgamal decryption (new side-channel attack)

Feb 27, 2015

References

lists.gnupg.org / pipermail/gnupg-announce/2015q1/000363.html
PatchRelease NotesVendor Advisory
lists.gnupg.org / pipermail/gnupg-announce/2015q1/000364.html
PatchVendor Advisory
cs.tau.ac.il / ~tromer/radioexp
Third Party Advisory
debian.org / security/2015/dsa-3184
Third Party Advisory
debian.org / security/2015/dsa-3185
Third Party Advisory