CVE-2015-0837

Name: CVE-2015-0837
Creator: NVD / NIST
Published: 2019-11-29T22:15:11.783+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.9/10EPSS 1.95%

Last modified Jun 17, 2026

CVE-2015-0837 is a medium-severity vulnerability rated 5.9/10 on the CVSS scale. The mpi_powm function in Libgcrypt before 1.6.3 and GnuPG before 1.4.19 allows attackers to obtain sensitive information by leveraging timing differences when accessing a pre-computed table during modular exponentiation, related to a "Last-Level Cache Side-Channel Attack.". EPSS estimates a 1.95% chance of exploitation in the next 30 days.

Description

The mpi_powm function in Libgcrypt before 1.6.3 and GnuPG before 1.4.19 allows attackers to obtain sensitive information by leveraging timing differences when accessing a pre-computed table during modular exponentiation, related to a "Last-Level Cache Side-Channel Attack."

Metrics

CVSS 3.1

5.9/10

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

EPSS Probability

1.95%

77.7th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-203

Affected Software

Vendor	Product	Versions
Gnupg	Gnupg	< 1.4.19
Gnupg	Libgcrypt	< 1.6.3
Debian	Debian Linux	7.0
Debian	Debian Linux	8.0

References

http://www.debian.org/security/2015/dsa-3184Third Party Advisory
http://www.debian.org/security/2015/dsa-3185Third Party Advisory
https://ieeexplore.ieee.org/document/7163050Third Party Advisory
https://lists.gnupg.org/pipermail/gnupg-announce/2015q1/000363.htmlMailing List, Vendor Advisory
https://lists.gnupg.org/pipermail/gnupg-announce/2015q1/000364.htmlMailing List, Vendor Advisory
http://www.debian.org/security/2015/dsa-3184Third Party Advisory
http://www.debian.org/security/2015/dsa-3185Third Party Advisory
https://ieeexplore.ieee.org/document/7163050Third Party Advisory
https://lists.gnupg.org/pipermail/gnupg-announce/2015q1/000363.htmlMailing List, Vendor Advisory
https://lists.gnupg.org/pipermail/gnupg-announce/2015q1/000364.htmlMailing List, Vendor Advisory

Timeline

Published: Nov 29, 2019
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2015-0837?

How severe is CVE-2015-0837?

CVE-2015-0837 has a CVSS score of 5.9/10 (MEDIUM severity). The EPSS model estimates a 1.95% probability of exploitation in the next 30 days.

How do I fix CVE-2015-0837?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2015-0837?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST