FreeBSD : libevent -- multiple vulnerabilities (b8ee7a81-a879-4358-9b30-7dd1bd4c14b1)

critical Nessus Plugin ID 99556

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Synopsis

The remote FreeBSD host is missing one or more security-related updates.

Description

Debian Security reports :

CVE-2016-10195: The name_parse function in evdns.c in libevent before 2.1.6-beta allows remote attackers to have unspecified impact via vectors involving the label_len variable, which triggers an out-of-bounds stack read.

CVE-2016-10196: Stack-based buffer overflow in the evutil_parse_sockaddr_port function in evutil.c in libevent before 2.1.6-beta allows attackers to cause a denial of service (segmentation fault) via vectors involving a long string in brackets in the ip_as_string argument.

CVE-2016-10197: The search_make_new function in evdns.c in libevent before 2.1.6-beta allows attackers to cause a denial of service (out-of-bounds read) via an empty hostname.

Solution

Update the affected packages.

See Also

https://www.openwall.com/lists/oss-security/2017/01/31/17

https://github.com/libevent/libevent/issues/317

https://github.com/libevent/libevent/issues/318

https://github.com/libevent/libevent/issues/332

https://github.com/libevent/libevent/issues/335

http://www.nessus.org/u?7d59ee6b

Plugin Details

Severity: Critical

ID: 99556

File Name: freebsd_pkg_b8ee7a81a87943589b307dd1bd4c14b1.nasl

Version: 3.4

Type: local

Published: 4/21/2017

Updated: 1/4/2021

Dependencies: ssh_get_info.nasl

Risk Information

VPR

Risk Factor: Medium

Score: 6.7

CVSS v2

Risk Factor: High

Base Score: 7.5

Vector: AV:N/AC:L/Au:N/C:P/I:P/A:P

CVSS v3

Risk Factor: Critical

Base Score: 9.8

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

Vulnerability Information

CPE: p-cpe:/a:freebsd:freebsd:libevent, p-cpe:/a:freebsd:freebsd:libevent2, p-cpe:/a:freebsd:freebsd:linux-c6-libevent2, p-cpe:/a:freebsd:freebsd:linux-c7-libevent, cpe:/o:freebsd:freebsd

Required KB Items: Host/local_checks_enabled, Host/FreeBSD/release, Host/FreeBSD/pkg_info

Patch Publication Date: 4/19/2017

Vulnerability Publication Date: 1/31/2017

Reference Information

CVE: CVE-2016-10195, CVE-2016-10196, CVE-2016-10197