Integer overflow

2019-07-1618:15:00

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8.1 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

REQUIRED

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

NONE

Availability Impact

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:H

8 High

AI Score

Confidence

High

5.8 Medium

CVSS2

Access Vector

NETWORK

Access Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

NONE

Availability Impact

PARTIAL

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

0.003 Low

EPSS

Percentile

68.5%

JSON

In libssh2 before 1.9.0, kex_method_diffie_hellman_group_exchange_sha256_key_exchange in kex.c has an integer overflow that could lead to an out-of-bounds read in the way packets are read from the server. A remote attacker who compromises a SSH server may be able to disclose sensitive information or cause a denial of service condition on the client system when a user connects to the server. This is related to an _libssh2_check_length mistake, and is different from the various issues fixed in 1.8.1, such as CVE-2019-3855.

CPENameOperatorVersion
debian_linuxeq8.0
debian_linuxeq9.0
traffix_systems_signaling_delivery_controllerge5.0.0
traffix_systems_signaling_delivery_controllerle5.1.0
fedoraeq29
fedoraeq30
libssh2lt1.9.0
e-series_santricity_os_controllerge11.0.0
e-series_santricity_os_controllerle11.70.1

Name	Operator	Version
debian_linux	eq	8.0
debian_linux	eq	9.0
traffix_systems_signaling_delivery_controller	ge	5.0.0
traffix_systems_signaling_delivery_controller	le	5.1.0
fedora	eq	29
fedora	eq	30
libssh2	lt	1.9.0
e-series_santricity_os_controller	ge	11.0.0
e-series_santricity_os_controller	le	11.70.1