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f5F5F5:K21531693
HistoryAug 11, 2016 - 12:00 a.m.

K21531693 : libssh2 vulnerability CVE-2016-0787

2016-08-1100:00:00
my.f5.com
20

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

5.7 Medium

AI Score

Confidence

High

4.3 Medium

CVSS2

Access Vector

NETWORK

Access Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

NONE

Availability Impact

NONE

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

0.005 Low

EPSS

Percentile

75.1%

Security Advisory Description

The diffie_hellman_sha256 function in kex.c in libssh2 before 1.7.0 improperly truncates secrets to 128 or 256 bits, which makes it easier for man-in-the-middle attackers to decrypt or intercept SSH sessions via unspecified vectors, aka a “bits/bytes confusion bug.” (CVE-2016-0787)
Impact
BIG-IQ, F5 iWorkflow, Enterprise Manager, FirePass, and Traffix SDCThere is no impact. These F5 products are not affected by this vulnerability.ARX and LineRateThis vulnerability may allow unauthorized disclosure of information.BIG-IPIn default configurations, there is no impact. This vulnerability is only exposed when using the secure shell (SSH) protocol within thecURLutility. For example, using the SSH/SFTP functionality within thecURLutility interactively or within a script, or configuring a custom Extended Application Verification (EAV) monitor which uses SSH/SFTP from within the** cURL** utility.Note: Built-in monitors are not affected by this vulnerability.

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

5.7 Medium

AI Score

Confidence

High

4.3 Medium

CVSS2

Access Vector

NETWORK

Access Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

NONE

Availability Impact

NONE

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

0.005 Low

EPSS

Percentile

75.1%