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CVE-2017-18594

Date: August 28, 2019

nse_libssh2.cc in Nmap 7.70 is subject to a denial of service condition due to a double free when an SSH connection fails, as demonstrated by a leading \n character to ssh-brute.nse or ssh-auth-methods.nse.

Language: C

Severity Score

7.5

Related Resources (12)

Url: https://github.com/AMatchandaHaystack/Research/blob/master/Nmap%26libsshDF

Url: https://github.com/nmap/nmap/issues/1077

Url: http://lists.opensuse.org/opensuse-security-announce/2019-09/msg00075.html

Url: https://seclists.org/nmap-dev/2018/q2/45

Url: https://seclists.org/nmap-announce/2019/0

Url: https://github.com/nmap/nmap/commit/350bbe0597d37ad67abe5fef8fba984707b4e9ad

Url: https://github.com/nmap/nmap/issues/1227

Url: https://security-tracker.debian.org/tracker/CVE-2017-18594

Url: http://lists.opensuse.org/opensuse-security-announce/2019-09/msg00073.html

Url: https://security.alpinelinux.org/vuln/CVE-2017-18594

Url: https://nvd.nist.gov/vuln/detail/CVE-2017-18594

Url: https://www.mend.io/vulnerability-database/CVE-2017-18594

Severity Score

7.5

Weakness Type (CWE)

Double Free

CWE-415

CVSS v3.1

Base Score:	7.5
Attack Vector (AV):	NETWORK
Attack Complexity (AC):	LOW
Privileges Required (PR):	NONE
User Interaction (UI):	NONE
Scope (S):	UNCHANGED
Confidentiality (C):	NONE
Integrity (I):	NONE
Availability (A):	HIGH

CVSS v2

Base Score:	5.0
Access Vector (AV):	NETWORK
Access Complexity (AC):	LOW
Authentication (AU):	NONE
Confidentiality (C):	NONE
Integrity (I):	NONE
Availability (A):	PARTIAL
Additional information:

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