PT-2019-2911 · Dnsmasq+2 · Dnsmasq+2

Samuel R Lovejoy · Published 2016-05-20 · Updated 2023-03-03 · CVE-2019-14513

Positive Technologies (AI Summary)

CVSS v2.0

7.8

High

Base vector

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

Name of the Vulnerable Software and Affected Versions Dnsmasq versions prior to 2.76

Description The issue is related to improper bounds checking in the do doctor function of the Dnsmasq DNS server, which can lead to a buffer overflow in memory. This can be exploited by a remote attacker who controls a DNS server, allowing them to cause a denial of service or execute arbitrary code when the DNS server sends a specially crafted response larger than 4096 bytes.

Recommendations For versions prior to 2.76, update to version 2.76 or later to resolve the issue. As a temporary workaround, consider restricting the size of DNS packets to prevent exploitation until a patch is applied.

Exploit

Fix

Out of bounds Read

Buffer Overflow

Weakness Enumeration

CWE-125

CWE-119

Related Identifiers

ALT-PU-2016-1523

BDU:2019-02883

CVE-2019-14513

DLA-1921-1

USN-4924-1

Affected Products

Alt Linux

Dnsmasq

Ubuntu

References · 17

• 🔥 https://github.com/Slovejoy/dnsmasq-pre2.76 · Exploit
• https://osv.dev/vulnerability/USN-4924-1 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2019-14513 · Vendor Advisory
• https://osv.dev/vulnerability/DEBIAN-CVE-2019-14513 · Vendor Advisory
• https://osv.dev/vulnerability/DLA-1921-1 · Vendor Advisory
• https://ubuntu.com/security/notices/USN-4924-1 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2019-14513 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2019-14513 · Security Note
• https://bdu.fstec.ru/vul/2019-02883 · Security Note
• https://ubuntu.com/security/CVE-2017-15107 · Vendor Advisory
• https://ubuntu.com/security/CVE-2019-14513 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2019-14513 · Security Note
• https://security-tracker.debian.org/tracker/CVE-2019-14513 · Vendor Advisory
• https://t.me/cvenotify/45434 · Telegram Post
• https://securitylab.ru/vulnerability/500279.php%D1%81 · Note