ASA-201707-1 log original external raw
[ASA-201707-1] libgcrypt: private key recovery |
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Arch Linux Security Advisory ASA-201707-1
=========================================
Severity: High
Date : 2017-07-03
CVE-ID : CVE-2017-7526
Package : libgcrypt
Type : private key recovery
Remote : No
Link : https://security.archlinux.org/AVG-338
Summary
=======
The package libgcrypt before version 1.7.8-1 is vulnerable to private
key recovery.
Resolution
==========
Upgrade to 1.7.8-1.
# pacman -Syu "libgcrypt>=1.7.8-1"
The problem has been fixed upstream in version 1.7.8.
Workaround
==========
None.
Description
===========
The pattern of squarings and multiplications in left-to-right sliding
windows in libgcrypt <= 1.7.7 leaks significant information about
exponent bits, allowing for the very efficient recovery of a full
1024-bit RSA key.
Impact
======
A local attacker can use a side-channel attack to recover a secret
private key.
References
==========
https://eprint.iacr.org/2017/627
https://git.gnupg.org/cgi-bin/gitweb.cgi?p=libgcrypt.git;a=commitdiff;h=a9f612def801c8145d551d995475e5d51a4c988c;hp=0e6788517eac6f508fa32ec5d5c1cada7fb980bc
https://security.archlinux.org/CVE-2017-7526
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