Vulnerability Monitor

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CVE-2015-0837

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."

Security Impact Summary

This vulnerability carries a MEDIUM severity rating with a CVSS v3.1 score of 5.9, indicating it can be exploited remotely over the network but requires specific conditions to be met without requiring user interaction and does not require pre-existing privileges . The vulnerability impacts confidentiality (data exposure), for affected systems. Impacting 3 products from gnupg, from gnupg, from debian organizations running these solutions should prioritize assessment and patching.

Historical Context

First disclosed in 2019, this vulnerability was reported during a period defined by widespread IoT adoption challenges, mobile security concerns, and the emergence of advanced persistent threat (APT) techniques. Contemporary mitigation strategies focused on secure development practices and third-party component vetting.

Published

2019-11-29T22:15:11.783

Last Modified

2024-11-21T02:23:49.950

Status

Modified

Source

[email protected]

Severity

CVSSv3.1: 5.9 (MEDIUM)

CVSSv2 Vector

AV:N/AC:M/Au:N/C:P/I:N/A:N

Access Vector: NETWORK
Access Complexity: MEDIUM
Authentication: NONE
Confidentiality Impact: PARTIAL
Integrity Impact: NONE
Availability Impact: NONE

Exploitability Score

8.6

Impact Score

2.9

Weaknesses

Type: Primary
CWE-203

Affected Vendors & Products

Type	Vendor	Product	Version/Range	Vulnerable?
Application	gnupg	gnupg	< 1.4.19	Yes
Application	gnupg	libgcrypt	< 1.6.3	Yes
Operating System	debian	debian_linux	7.0	Yes
Operating System	debian	debian_linux	8.0	Yes

References

http://www.debian.org/security/2015/dsa-3184 Third Party Advisory ([email protected])
http://www.debian.org/security/2015/dsa-3185 Third Party Advisory ([email protected])
https://ieeexplore.ieee.org/document/7163050 Third Party Advisory ([email protected])
https://lists.gnupg.org/pipermail/gnupg-announce/2015q1/000363.html Mailing List, Vendor Advisory ([email protected])
https://lists.gnupg.org/pipermail/gnupg-announce/2015q1/000364.html Mailing List, Vendor Advisory ([email protected])
http://www.debian.org/security/2015/dsa-3184 Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
http://www.debian.org/security/2015/dsa-3185 Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://ieeexplore.ieee.org/document/7163050 Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://lists.gnupg.org/pipermail/gnupg-announce/2015q1/000363.html Mailing List, Vendor Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://lists.gnupg.org/pipermail/gnupg-announce/2015q1/000364.html Mailing List, Vendor Advisory (af854a3a-2127-422b-91ae-364da2661108)

How SecUtils Interprets This CVE

SecUtils normalizes and enriches National Vulnerability Database (NVD) records by standardizing vendor and product identifiers, aggregating vulnerability metadata from both NVD and MITRE sources, and providing structured context for security teams. For gnupg's affected products, we extract Common Platform Enumeration (CPE) data, Common Weakness Enumeration (CWE) classifications, CVSS severity metrics, and reference data to enable rapid vulnerability prioritization and asset correlation. This record contains no exploit code, proof-of-concept instructions, or attack methodologies—only defensive intelligence necessary for patch management, risk assessment, and security operations.