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Mend.io Vulnerability Database

CVE-2021-23017

Date: June 1, 2021

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.

Language: C

Severity Score

7.7

Related Resources (30)

Url: https://bugzilla.redhat.com/show_bug.cgi?id=1963121

Url: https://lists.apache.org/thread.html/rf318aeeb4d7a3a312734780b47de83cefb7e6995da0b2cae5c28675c%40%3Cnotifications.apisix.apache.org%3E

Url: https://people.canonical.com/~ubuntu-security/cve/CVE-2021-23017

Url: https://lists.apache.org/thread.html/r4d4966221ca399ce948ef34884652265729d7d9ef8179c78d7f17e7f%40%3Cnotifications.apisix.apache.org%3E

Url: https://lists.apache.org/thread.html/rf232eecd47fdc44520192810560303073cefd684b321f85e311bad31%40%3Cnotifications.apisix.apache.org%3E

Url: https://www.oracle.com/security-alerts/cpujan2022.html

Url: https://support.f5.com/csp/article/K12331123,

Url: https://security.alpinelinux.org/vuln/CVE-2021-23017

Url: https://support.f5.com/csp/article/K12331123%2C

Url: https://lists.apache.org/thread.html/r4d4966221ca399ce948ef34884652265729d7d9ef8179c78d7f17e7f@%3Cnotifications.apisix.apache.org%3E

Url: http://packetstormsecurity.com/files/167720/Nginx-1.20.0-Denial-Of-Service.html

Url: https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/7SFVYHC7OXTEO4SMBWXDVK6E5IMEYMEE/

Url: https://www.oracle.com/security-alerts/cpuapr2022.html

Url: https://www.oracle.com/security-alerts/cpuoct2021.html

Url: https://lists.apache.org/thread.html/r37e6b2165f7c910d8e15fd54f4697857619ad2625f56583802004009@%3Cnotifications.apisix.apache.org%3E

Url: https://security.netapp.com/advisory/ntap-20210708-0006/

Url: https://security-tracker.debian.org/tracker/CVE-2021-23017

Url: https://lists.apache.org/thread.html/r6fc5c57b38e93e36213e9a18c8a4e5dbd5ced1c7e57f08a1735975ba%40%3Cnotifications.apisix.apache.org%3E

Url: https://nvd.nist.gov/vuln/detail/CVE-2021-23017

Url: https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/GNKOP2JR5L7KCIZTJRZDCUPJTUONMC5I/

Url: https://lists.apache.org/thread.html/r37e6b2165f7c910d8e15fd54f4697857619ad2625f56583802004009%40%3Cnotifications.apisix.apache.org%3E

Url: https://access.redhat.com/security/cve/CVE-2021-23017

Url: https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/GNKOP2JR5L7KCIZTJRZDCUPJTUONMC5I/

Url: https://lists.apache.org/thread.html/rf318aeeb4d7a3a312734780b47de83cefb7e6995da0b2cae5c28675c@%3Cnotifications.apisix.apache.org%3E

Url: https://lists.apache.org/thread.html/r6fc5c57b38e93e36213e9a18c8a4e5dbd5ced1c7e57f08a1735975ba@%3Cnotifications.apisix.apache.org%3E

Url: https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/7SFVYHC7OXTEO4SMBWXDVK6E5IMEYMEE/

Url: http://mailman.nginx.org/pipermail/nginx-announce/2021/000300.html

Url: https://lists.apache.org/thread.html/rf232eecd47fdc44520192810560303073cefd684b321f85e311bad31@%3Cnotifications.apisix.apache.org%3E

Url: https://github.com/nginx/nginx/commit/e860ecce82f1ee9cffb228d29d3ad61375b29aff

Url: https://www.mend.io/vulnerability-database/CVE-2021-23017

Severity Score

7.7

Weakness Type (CWE)

Off-by-one Error

CWE-193

CVSS v3.1

Base Score:	7.7
Attack Vector (AV):	NETWORK
Attack Complexity (AC):	HIGH
Privileges Required (PR):	NONE
User Interaction (UI):	NONE
Scope (S):	UNCHANGED
Confidentiality (C):	HIGH
Integrity (I):	HIGH
Availability (A):	LOW

CVSS v2

Base Score:	6.8
Access Vector (AV):	NETWORK
Access Complexity (AC):	MEDIUM
Authentication (AU):	NONE
Confidentiality (C):	PARTIAL
Integrity (I):	PARTIAL
Availability (A):	PARTIAL
Additional information:

Mend.io Vulnerability Database

We found results for “”

CVE-2021-23017

Date: June 1, 2021

Language: C

Severity Score

Related Resources (30)

Severity Score

Weakness Type (CWE)

CVSS v3.1

CVSS v2

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