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Information Exposure Affecting libgcrypt20 package, versions <1.8.3-1

Severity

 Recommended
0.0
medium
0
10

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Threat Intelligence

EPSS
0.1% (43rd percentile)

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  • Snyk IDSNYK-DEBIANUNSTABLE-LIBGCRYPT20-391887
  • published13 Jun 2018
  • disclosed13 Jun 2018
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Introduced: 13 Jun 2018

CVE-2018-0495  (opens in a new tab)
CWE-203  (opens in a new tab)

How to fix?

Upgrade Debian:unstable libgcrypt20 to version 1.8.3-1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream libgcrypt20 package and not the libgcrypt20 package as distributed by Debian. See How to fix? for Debian:unstable relevant fixed versions and status.

Libgcrypt before 1.7.10 and 1.8.x before 1.8.3 allows a memory-cache side-channel attack on ECDSA signatures that can be mitigated through the use of blinding during the signing process in the _gcry_ecc_ecdsa_sign function in cipher/ecc-ecdsa.c, aka the Return Of the Hidden Number Problem or ROHNP. To discover an ECDSA key, the attacker needs access to either the local machine or a different virtual machine on the same physical host.

References