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Out-of-bounds Read Affecting libssh2 package, versions <1.8.0-2.1+deb10u1

0.0
high

Snyk CVSS

    Attack Complexity Low
    User Interaction Required
    Confidentiality High
    Availability High

    Threat Intelligence

    EPSS 0.29% (69th percentile)
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NVD
8.1 high
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Red Hat
6.8 medium

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  • Snyk ID SNYK-DEBIAN10-LIBSSH2-452460
  • published 24 Jul 2019
  • disclosed 16 Jul 2019
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Introduced: 16 Jul 2019

CVE-2019-13115 Open this link in a new tab
CWE-125 Open this link in a new tab
CWE-190 Open this link in a new tab

How to fix?

Upgrade Debian:10 libssh2 to version 1.8.0-2.1+deb10u1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream libssh2 package and not the libssh2 package as distributed by Debian. See How to fix? for Debian:10 relevant fixed versions and status.

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.

References