CVE-2018-0495

Published: 13 June 2018

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.

Priority

Cvss 3 Severity Score

4.7

Score breakdown

Status

Package	Release	Status
libgcrypt11 Launchpad, Ubuntu, Debian	artful	Does not exist
	bionic	Does not exist
	cosmic	Does not exist
	disco	Does not exist
	trusty	Released (1.5.3-2ubuntu4.6)
	upstream	Needs triage
	xenial	Does not exist
	yakkety	Does not exist
	zesty	Does not exist
libgcrypt20 Launchpad, Ubuntu, Debian	artful	Released (1.7.8-2ubuntu1.1)
	bionic	Released (1.8.1-4ubuntu1.1)
	cosmic	Released (1.8.3-1ubuntu1)
	disco	Released (1.8.3-1ubuntu1)
	trusty	Does not exist (trusty was needed)
	upstream	Released (1.7.10,1.8.3)
	xenial	Released (1.6.5-2ubuntu0.5)
	Patches: upstream: https://git.gnupg.org/cgi-bin/gitweb.cgi?p=libgcrypt.git;a=commit;h=9010d1576e278a4274ad3f4aa15776c28f6ba965
nss Launchpad, Ubuntu, Debian	artful	Ignored (reached end-of-life)
	bionic	Released (2:3.35-2ubuntu2.1)
	cosmic	Released (2:3.36.1-1ubuntu1.1)
	disco	Not vulnerable (2:3.39-1ubuntu1)
	trusty	Released (2:3.28.4-0ubuntu0.14.04.4)
	upstream	Released (3.38)
	xenial	Released (2:3.28.4-0ubuntu0.16.04.4)
	Patches: upstream: https://hg.mozilla.org/projects/nss/rev/ca18ca4ba00d
openssl Launchpad, Ubuntu, Debian	artful	Released (1.0.2g-1ubuntu13.6)
	bionic	Released (1.1.0g-2ubuntu4.1)
	cosmic	Released (1.1.0g-2ubuntu5)
	disco	Released (1.1.0g-2ubuntu5)
	trusty	Released (1.0.1f-1ubuntu2.26)
	upstream	Needs triage
	xenial	Released (1.0.2g-1ubuntu4.13)
	Patches: upstream: https://git.openssl.org/?p=openssl.git;a=commit;h=949ff36623eafc3523a9f91784992965018ffb05 (1.0.2) upstream: https://git.openssl.org/?p=openssl.git;a=commit;h=0c27d793745c7837b13646302b6890a556b7017a (1.1)
openssl098 Launchpad, Ubuntu, Debian	artful	Does not exist
	bionic	Does not exist
	cosmic	Does not exist
	disco	Does not exist
	trusty	Does not exist (trusty was needs-triage)
	upstream	Needs triage
	xenial	Does not exist
openssl1.0 Launchpad, Ubuntu, Debian	artful	Does not exist
	bionic	Released (1.0.2n-1ubuntu5.1)
	cosmic	Released (1.0.2n-1ubuntu6)
	disco	Does not exist
	trusty	Does not exist
	upstream	Needs triage
	xenial	Does not exist

Severity score breakdown

Parameter	Value
Base score	4.7
Attack vector	Local
Attack complexity	High
Privileges required	Low
User interaction	None
Scope	Unchanged
Confidentiality	High
Integrity impact	None
Availability impact	None
Vector	CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N

References

Bugs

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