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amazonAmazonALAS-2016-651
HistoryFeb 09, 2016 - 1:30 p.m.

Medium: gnutls

2016-02-0913:30:00
alas.aws.amazon.com
14

5.9 Medium

CVSS3

Attack Vector

NETWORK

Attack Complexity

HIGH

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

NONE

Availability Impact

NONE

CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N

4.3 Medium

CVSS2

Access Vector

NETWORK

Access Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

PARTIAL

Availability Impact

NONE

AV:N/AC:M/Au:N/C:N/I:P/A:N

0.003 Low

EPSS

Percentile

68.5%

Issue Overview:

A flaw was found in the way TLS 1.2 could use the MD5 hash function for signing ServerKeyExchange and Client Authentication packets during a TLS handshake. A man-in-the-middle attacker able to force a TLS connection to use the MD5 hash function could use this flaw to conduct collision attacks to impersonate a TLS server or an authenticated TLS client. (CVE-2015-7575)

Affected Packages:

gnutls

Issue Correction:
Run yum update gnutls to update your system.

New Packages:

i686:  
    gnutls-debuginfo-2.8.5-19.15.amzn1.i686  
    gnutls-guile-2.8.5-19.15.amzn1.i686  
    gnutls-2.8.5-19.15.amzn1.i686  
    gnutls-utils-2.8.5-19.15.amzn1.i686  
    gnutls-devel-2.8.5-19.15.amzn1.i686  
  
src:  
    gnutls-2.8.5-19.15.amzn1.src  
  
x86_64:  
    gnutls-guile-2.8.5-19.15.amzn1.x86_64  
    gnutls-devel-2.8.5-19.15.amzn1.x86_64  
    gnutls-2.8.5-19.15.amzn1.x86_64  
    gnutls-debuginfo-2.8.5-19.15.amzn1.x86_64  
    gnutls-utils-2.8.5-19.15.amzn1.x86_64  

Additional References

Red Hat: CVE-2015-7575

Mitre: CVE-2015-7575

5.9 Medium

CVSS3

Attack Vector

NETWORK

Attack Complexity

HIGH

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

NONE

Availability Impact

NONE

CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N

4.3 Medium

CVSS2

Access Vector

NETWORK

Access Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

PARTIAL

Availability Impact

NONE

AV:N/AC:M/Au:N/C:N/I:P/A:N

0.003 Low

EPSS

Percentile

68.5%

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