PT-2017-4231 · Dnsmasq+1 · Dnsmasq+1

Arne Woerner + 3 · Publicado 2017-09-07 · Atualizado 2018-05-11 · CVE-2017-13704

Positive Technologies (AI Summary)

CVSS v2.0

7.8

Alta

Vetor base

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

Name of the Vulnerable Software and Affected Versions dnsmasq versions prior to 2.78

Description The issue is related to insufficient size checking of DNS packets in the memset() function of the dnsmasq DNS server. This can be exploited by a remote attacker to cause a denial of service by sending specially crafted requests to port 53/udp. The exploitation leads to dnsmasq crashing due to an incorrect size parameter in a memset call, resulting in an attempt to write a large number of zeros.

Recommendations For versions prior to 2.78, update to version 2.78 or later to resolve the issue. As a temporary workaround, consider restricting access to the DNS server to minimize the risk of exploitation.

Exploit

Correção

RCE

Integer Overflow

Enumeração de Fraquezas

CWE-20

CWE-190

Identificadores relacionados

ALT-PU-2017-2387

BDU:2022-07423

CVE-2017-13704

MGASA-2017-0364

MGASA-2017-0367

Produtos afetados

Alt Linux

Dnsmasq

Referências · 65

• 🔥 https://github.com/google/security-research-pocs/blob/master/vulnerabilities/dnsmasq/CVE-2017-14491.py · Exploit
• 🔥 https://github.com/google/security-research-pocs/blob/master/vulnerabilities/dnsmasq/CVE-2017-14494.py · Exploit
• 🔥 https://github.com/google/security-research-pocs/blob/master/vulnerabilities/dnsmasq/CVE-2017-14492.py · Exploit
• 🔥 https://github.com/google/security-research-pocs/blob/master/vulnerabilities/dnsmasq/CVE-2017-14495.py · Exploit
• 🔥 https://github.com/google/security-research-pocs/blob/master/vulnerabilities/dnsmasq/CVE-2017-14493.py · Exploit
• 🔥 https://github.com/google/security-research-pocs/blob/master/vulnerabilities/dnsmasq/CVE-2017-14496.py · Exploit
• 🔥 https://github.com/pupiles/bof-dnsmasq-cve-2017-14493 · Exploit
• https://access.redhat.com/security/vulnerabilities/3199382 · Nota
• https://lists.fedoraproject.org/archives/list/[e-mail]/message/4TK6DWC53WSU6633EVZL7H4PCWBYHMHK · Aviso do Fabricante
• https://bdu.fstec.ru/vul/2022-07423 · Nota de Segurança
• https://mail-archive.com/[e-mail]/msg11665.html · Nota
• https://osv.dev/vulnerability/UBUNTU-CVE-2017-13704 · Aviso do Fabricante
• http://lists.thekelleys.org.uk/pipermail/dnsmasq-discuss/2017q3/011729.html · Nota
• https://errata.altlinux.org/ALT-PU-2017-2387 · Aviso do Fabricante
• http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-14492 · Nota de Segurança