CVE-2021-23017 Information

Description

A security issue in nginx resolver was identified which might allow an attacker who is able to forge UDP packets from the DNS server to cause 1-byte memory overwrite resulting in worker process crash or potential other impact.

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:L

Reference

http://mailman.nginx.org/pipermail/nginx-announce/2021/000300.html https://support.f5.com/csp/article/K12331123 https://lists.apache.org/thread.html/r6fc5c57b38e93e36213e9a18c8a4e5dbd5ced1c7e57f08a1735975ba@%3Cnotifications.apisix.apache.org%3E https://lists.apache.org/thread.html/rf318aeeb4d7a3a312734780b47de83cefb7e6995da0b2cae5c28675c@%3Cnotifications.apisix.apache.org%3E https://lists.apache.org/thread.html/r37e6b2165f7c910d8e15fd54f4697857619ad2625f56583802004009@%3Cnotifications.apisix.apache.org%3E https://lists.apache.org/thread.html/rf232eecd47fdc44520192810560303073cefd684b321f85e311bad31@%3Cnotifications.apisix.apache.org%3E https://lists.apache.org/thread.html/r4d4966221ca399ce948ef34884652265729d7d9ef8179c78d7f17e7f@%3Cnotifications.apisix.apache.org%3E https://lists.fedoraproject.org/archives/list/[email protected]/message/7SFVYHC7OXTEO4SMBWXDVK6E5IMEYMEE/ https://lists.fedoraproject.org/archives/list/[email protected]/message/GNKOP2JR5L7KCIZTJRZDCUPJTUONMC5I/ https://security.netapp.com/advisory/ntap-20210708-0006/ https://www.oracle.com/security-alerts/cpuoct2021.html https://www.oracle.com/security-alerts/cpujan2022.html https://www.oracle.com/security-alerts/cpuapr2022.html

Attack Complexity

LOW

Privileges Required

NONE

User Interaction Required

NONE

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

HIGH

Availability Impact

HIGH

Base Score

LOW

Base Severity

9.4