Gentoo: GLSA-202003-32 Low: Libgcrypt Side-Channel Attack Analysis
gentoo
March 15, 2020
A vulnerability in Libgcrypt could allow a local attacker to recover sensitive information.
Summary
A timing attack was found in the way ECCDSA was implemented in Libgcrypt.
Topics Covered
Resolution
All Libgcrypt users should upgrade to the latest version:
# emerge --sync
# emerge --ask --oneshot --verbose ">=dev-libs/libgcrypt-1.8.5"
References
[ 1 ] CVE-2019-13627 https://nvd.nist.gov/vuln/detail/CVE-2019-13627
Availability
This GLSA and any updates to it are available for viewing at
the Gentoo Security Website:
https://security.gentoo.org/glsa/202003-32
style>.gentoo_availability{display:block;}
Concerns
Security is a primary focus of Gentoo Linux and ensuring the confidentiality and security of our users' machines is of utmost importance to us. Any security concerns should be addressed to security@gentoo.org or alternatively, you may file a bug at https://bugs.gentoo.org.
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Severity: Low
Title: Libgcrypt: Side-channel attack
Date: March 15, 2020
Bugs: #693108
ID: 202003-32
Topics Covered
Background
Libgcrypt is a general purpose cryptographic library derived out of
GnuPG.
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Affected Packages
-------------------------------------------------------------------
Package / Vulnerable / Unaffected
-------------------------------------------------------------------
1 dev-libs/libgcrypt < 1.8.5 >= 1.8.5
Impact
=====
A local man-in-the-middle attacker, during signature generation, could
possibly recover the private key.
Workaround
There is no known workaround at this time.
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