PT-2021-7707 · Dnsmasq+2 · Dnsmasq+2

Hauke Mehrtens · Published 2021-07-06 · Updated 2024-08-04 · CVE-2021-45951

Positive Technologies (AI Summary)

CVSS v3.1

10

Critical

Base vector

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

Name of the Vulnerable Software and Affected Versions Dnsmasq (affected versions not specified)

Description The issue is related to a buffer overflow in the check bad address function of the Dnsmasq DNS server. Exploitation of this issue may allow a remote attacker to access confidential data, compromise its integrity, and cause a denial of service.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Exploit

Memory Corruption

Weakness Enumeration

CWE-787

Related Identifiers

ALT-PU-2022-2683

ALT-PU-2022-2830

BDU:2023-01685

CVE-2021-45951

Affected Products

Alt Linux

Debian

Dnsmasq

References · 27

• 🔥 https://github.com/google/oss-fuzz-vulns/blob/main/vulns/dnsmasq/OSV-2021-924.yaml · Exploit
• 🔥 https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=35868 · Exploit
• https://bdu.fstec.ru/vul/2023-01685 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2021-45951 · Security Note
• https://wiki.astralinux.ru/astra-linux-se17-bulletin-2023-0303SE17MD · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2021-45951 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2021-45951 · Vendor Advisory
• https://t.me/cvenotify/88928 · Telegram Post
• https://t.me/cvenotify/88926 · Telegram Post
• https://t.me/cvenotify/88927 · Telegram Post
• https://lists.thekelleys.org.uk/pipermail/dnsmasq-discuss/2022q1/016162.html · Note
• https://twitter.com/underlinux/status/1775130395127775424 · Twitter Post
• https://t.me/cvenotify/88923 · Telegram Post
• https://t.me/cvenotify/27068 · Telegram Post
• https://t.me/cvenotify/88924 · Telegram Post