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PostPosted: Tue Jul 11, 2017 7:26 pm    Post subject: [ GLSA 201706-22 ] libksba Reply with quote

Gentoo Linux Security Advisory

Title: libksba: Denial of Service and information disclosure (GLSA 201706-22)
Severity: normal
Exploitable: remote
Date: 2017-06-22
Bug(s): #592078
ID: 201706-22

Synopsis

Multiple vulnerabilities have been found in libksba which might
allow remote attackers to obtain sensitive information or crash an
libksba-based application.


Background

Libksba is a X.509 and CMS (PKCS#7) library.

Affected Packages

Package: dev-libs/libksba
Vulnerable: < 1.3.5
Unaffected: >= 1.3.5
Architectures: All supported architectures


Description

It was found that an unproportionate amount of memory is allocated when
parsing crafted certificates in libskba, which may lead to Denial of
Service condition.
Moreover in libksba 1.3.4, allocated memory is uninitialized and could
potentially contain sensitive data left in freed memory block.


Impact

A remote attacker, able to interact with an libksba-based application,
could possibly obtain sensitive information or cause a Denial of Service
condition.


Workaround

There is no known workaround at this time.

Resolution

All libksba users should upgrade to the latest version:
Code:
# emerge --sync
      # emerge --ask --oneshot --verbose ">=dev-libs/libksba-1.3.5"
   


References

CVE-2016-4579
Upstream report
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