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CVE-2015-0837

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Date: November 29, 2019

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."

Language: C

Severity Score

Related Resources (10)

https://lists.gnupg.org/pipermail/gnupg-announce/2015q1/000364.html
https://people.canonical.com/~ubuntu-security/cve/CVE-2015-0837
https://security-tracker.debian.org/tracker/CVE-2015-0837
https://nvd.nist.gov/vuln/detail/CVE-2015-0837
http://www.debian.org/security/2015/dsa-3184
https://access.redhat.com/security/cve/CVE-2015-0837
http://www.debian.org/security/2015/dsa-3185
https://lists.gnupg.org/pipermail/gnupg-announce/2015q1/000363.html
https://ieeexplore.ieee.org/document/7163050
https://www.mend.io/vulnerability-database/CVE-2015-0837

Severity Score

Weakness Type (CWE)

Observable Discrepancy

CWE-203

Top Fix

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Upgrade to version libgcrypt-1.6.3

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CVSS v3.1

Base Score:
Attack Vector (AV): NETWORK
Attack Complexity (AC): HIGH
Privileges Required (PR): NONE
User Interaction (UI): NONE
Scope (S): UNCHANGED
Confidentiality (C): HIGH
Integrity (I): NONE
Availability (A): NONE

CVSS v2

Base Score:
Access Vector (AV): NETWORK
Access Complexity (AC): MEDIUM
Authentication (AU): NONE
Confidentiality (C): PARTIAL
Integrity (I): NONE
Availability (A): NONE
Additional information:

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