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[ GLSA 201402-25 ] OpenSSL: Denial of Service
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PostPosted: Fri Feb 21, 2014 9:26 pm    Post subject: [ GLSA 201402-25 ] OpenSSL: Denial of Service Reply with quote

Gentoo Linux Security Advisory

Title: OpenSSL: Denial of Service (GLSA 201402-25)
Severity: normal
Exploitable: remote
Date: February 21, 2014
Bug(s): #497838
ID: 201402-25

Synopsis

A vulnerability in OpenSSL's handling of TLS handshakes could
result in a Denial of Service condition.


Background

OpenSSL is an Open Source toolkit implementing the Secure Sockets Layer
(SSL v2/v3) and Transport Layer Security (TLS v1) as well as a general
purpose cryptography library.


Affected Packages

Package: dev-libs/openssl
Vulnerable: < 1.0.1f
Unaffected: >= 1.0.1f
Unaffected: < 1.0.1
Architectures: All supported architectures


Description

A flaw in the ssl3_take_mac function can result in a NULL pointer
dereference.


Impact

A remote attacker could send a specially crafted TLS handshake,
resulting in a Denial of Service condition.


Workaround

There is no known workaround at this time.

Resolution

All OpenSSL 1.0.1 users should upgrade to the latest version:
Code:
# emerge --sync
      # emerge --ask --oneshot --verbose ">=dev-libs/openssl-1.0.1f"
   


References

CVE-2013-4353
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