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PostPosted: Mon Oct 10, 2016 11:26 am    Post subject: [ GLSA 201610-04 ] libgcrypt Reply with quote

Gentoo Linux Security Advisory

Title: libgcrypt: Multiple vulnerabilities (GLSA 201610-04)
Severity: normal
Exploitable: remote
Date: October 10, 2016
Bug(s): #541564, #559942, #574268, #591534
ID: 201610-04

Synopsis

Multiple vulnerabilities have been fixed in libgcrypt,the worst of
which results in predictable output from the random number generator.


Background

libgcrypt is a general purpose cryptographic library derived out of
GnuPG.


Affected Packages

Package: dev-libs/libgcrypt
Vulnerable: < 1.7.3
Unaffected: >= 1.7.3
Architectures: All supported architectures


Description

Multiple vulnerabilities have been discovered in libgcrypt. Please
review the CVE identifiers referenced below for details.


Impact

Side-channel attacks can leak private key information. A separate
critical bug allows an attacker who obtains 4640 bits from the RNG to
trivially predict the next 160 bits of output.


Workaround

There is no known workaround at this time.

Resolution

All libgcrypt users should upgrade to the latest version:
Code:
# emerge --sync
      # emerge --ask --oneshot --verbose ">=dev-libs/libgcrypt-1.7.3"
   


References

CVE-2014-3591
CVE-2015-0837
CVE-2015-7511
CVE-2016-6313

Factoring RSA Keys With TLS Perfect Forward Secrecy
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