FreeBSD : glibc -- getaddrinfo stack-based buffer overflow (2dd7e97e-d5e8-11e5-bcbd-bc5ff45d0f28)

high Nessus Plugin ID 88817

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Synopsis

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

Description

Fabio Olive Leite reports :

A stack-based buffer overflow was found in libresolv when invoked from nss_dns, allowing specially crafted DNS responses to seize control of EIP in the DNS client. The buffer overflow occurs in the functions send_dg (send datagram) and send_vc (send TCP) for the NSS module libnss_dns.so.2 when calling getaddrinfo with AF_UNSPEC family, or in some cases AF_INET6 family. The use of AF_UNSPEC (or AF_INET6 in some cases) triggers the low-level resolver code to send out two parallel queries for A and AAAA. A mismanagement of the buffers used for those queries could result in the response of a query writing beyond the alloca allocated buffer created by __res_nquery.

Solution

Update the affected packages.

Plugin Details

Severity: High

ID: 88817

File Name: freebsd_pkg_2dd7e97ed5e811e5bcbdbc5ff45d0f28.nasl

Version: 2.15

Type: local

Family: FreeBSD Local Security Checks

Published: 2/18/2016

Updated: 6/18/2024

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: High

Score: 7.4

CVSS v2

Risk Factor: Critical

Base Score: 10

Temporal Score: 7.8

Vector: CVSS2#AV:N/AC:L/Au:N/C:C/I:C/A:C

CVSS v3

Risk Factor: High

Base Score: 8.1

Temporal Score: 7.3

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

Temporal Vector: CVSS:3.0/E:P/RL:O/RC:C

Vulnerability Information

CPE: cpe:/o:freebsd:freebsd, p-cpe:/a:freebsd:freebsd:linux_base-c6, p-cpe:/a:freebsd:freebsd:linux_base-f10, p-cpe:/a:freebsd:freebsd:linux_base-c6_64

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

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 2/18/2016

Vulnerability Publication Date: 2/16/2016

Reference Information

CVE: CVE-2015-7547

IAVA: 2016-A-0053-S

TRA: TRA-2017-08

Detections

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