[3.8] libgcrypt: Key Extraction Side Channel (CVE-2018-0495)
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:
https://nvd.nist.gov/vuln/detail/CVE-2018-0495
https://lists.gnupg.org/pipermail/gnupg-announce/2018q2/000426.html
Patch:
(from redmine: issue id 9003, created on 2018-06-14, closed on 2018-06-21)
- Relations:
- copied_to #9002 (closed)
- parent #9002 (closed)
- Changesets:
- Revision 25760a2a by Natanael Copa on 2018-06-19T11:13:33Z:
main/libgcrypt: security upgrade to 1.8.3
fixes #9003