CVE-2017-9526

In Libgcrypt before 1.7.7, an attacker who learns the EdDSA session key (from side-channel observation during the signing process) can easily recover the long-term secret key. 1.7.7 makes a cipher/ecc-eddsa.c change to store this session key in secure memory, to ensure that constant-time point operations are used in the MPI library.

CVSS v3.0 5.9 MEDIUM
CVSS v2.0 4.3 MEDIUM

5.9^/10

CVSS v3.0 : MEDIUM

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

Exploitability : 2.2 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity HIGH

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact NONE

Availability Impact NONE

Scope UNCHANGED

4.3^/10

CVSS v2.0 : MEDIUM

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

Exploitability : 8.6 / Impact : 2.9

Access Vector NETWORK

Access Complexity MEDIUM

Authentication NONE

Confidentiality Impact PARTIAL

Integrity Impact NONE

Availability Impact NONE

References

Link	Resource
https://git.gnupg.org/cgi-bin/gitweb.cgi?p=libgcrypt.git;a=commit;h=f9494b3f258e01b6af8bd3941ce436bcc00afc56	Issue Tracking Patch Third Party Advisory
https://git.gnupg.org/cgi-bin/gitweb.cgi?p=libgcrypt.git;a=commit;h=5a22de904a0a366ae79f03ff1e13a1232a89e26b	Issue Tracking Patch Third Party Advisory
https://bugzilla.suse.com/show_bug.cgi?id=1042326	Issue Tracking Patch
http://www.securityfocus.com/bid/99046	Third Party Advisory VDB Entry
http://www.debian.org/security/2017/dsa-3880
http://www.oracle.com/technetwork/security-advisory/cpujul2018-4258247.html
https://www.oracle.com/technetwork/security-advisory/cpujan2019-5072801.html

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Configurations

Configuration 1 (hide)

cpe:2.3:a:gnupg:libgcrypt:*:*:*:*:*:*:*:*

Information

Published : 2017-06-10 19:29

Updated : 2019-01-16 11:29

NVD link : CVE-2017-9526

Mitre link : CVE-2017-9526

JSON object : View

CWE

CWE-200

Exposure of Sensitive Information to an Unauthorized Actor

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Products Affected

gnupg

libgcrypt

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