VulnerabilityModified
CVE-2021-23017
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.
HIGH 7.7EPSS 53.5%
Does this matter?
EPSS puts the probability of exploitation in the next 30 days at 53.5%, higher than 99% of all known CVEs. Patch or mitigate before the next change window.
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 3.1
- 7.7 HIGHCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:L
- EPSS
- 53.46% probability · 99th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-193
- Affected
- f5/nginx · openresty/openresty · fedoraproject/fedora · netapp/ontap select deploy administration utility · oracle/blockchain platform · oracle/communications control plane monitor · oracle/communications fraud monitor · oracle/communications operations monitor · oracle/communications session border controller · oracle/enterprise communications broker · oracle/enterprise session border controller · oracle/enterprise telephony fraud monitor · oracle/goldengate
- Source
- f5sirt@f5.com
References
- http://mailman.nginx.org/pipermail/nginx-announce/2021/000300.htmlMailing List, Patch, Vendor Advisory
- http://packetstormsecurity.com/files/167720/Nginx-1.20.0-Denial-Of-Service.htmlThird Party Advisory, VDB Entry
- https://lists.apache.org/thread.html/r37e6b2165f7c910d8e15fd54f4697857619ad2625f56583802004009%40%3Cnotifications.apisix.apache.org%3E
- https://lists.apache.org/thread.html/r4d4966221ca399ce948ef34884652265729d7d9ef8179c78d7f17e7f%40%3Cnotifications.apisix.apache.org%3E
- https://lists.apache.org/thread.html/r6fc5c57b38e93e36213e9a18c8a4e5dbd5ced1c7e57f08a1735975ba%40%3Cnotifications.apisix.apache.org%3E
- https://lists.apache.org/thread.html/rf232eecd47fdc44520192810560303073cefd684b321f85e311bad31%40%3Cnotifications.apisix.apache.org%3E
- https://lists.apache.org/thread.html/rf318aeeb4d7a3a312734780b47de83cefb7e6995da0b2cae5c28675c%40%3Cnotifications.apisix.apache.org%3E
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/7SFVYHC7OXTEO4SMBWXDVK6E5IMEYMEE/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/GNKOP2JR5L7KCIZTJRZDCUPJTUONMC5I/
- https://security.netapp.com/advisory/ntap-20210708-0006/Third Party Advisory
- https://support.f5.com/csp/article/K12331123%2C
- https://www.oracle.com/security-alerts/cpuapr2022.htmlPatch, Third Party Advisory
- https://www.oracle.com/security-alerts/cpujan2022.htmlPatch, Third Party Advisory
- https://www.oracle.com/security-alerts/cpuoct2021.htmlPatch, Third Party Advisory
- http://mailman.nginx.org/pipermail/nginx-announce/2021/000300.htmlMailing List, Patch, Vendor Advisory
- http://packetstormsecurity.com/files/167720/Nginx-1.20.0-Denial-Of-Service.htmlThird Party Advisory, VDB Entry
- https://lists.apache.org/thread.html/r37e6b2165f7c910d8e15fd54f4697857619ad2625f56583802004009%40%3Cnotifications.apisix.apache.org%3E
- https://lists.apache.org/thread.html/r4d4966221ca399ce948ef34884652265729d7d9ef8179c78d7f17e7f%40%3Cnotifications.apisix.apache.org%3E
- https://lists.apache.org/thread.html/r6fc5c57b38e93e36213e9a18c8a4e5dbd5ced1c7e57f08a1735975ba%40%3Cnotifications.apisix.apache.org%3E
- https://lists.apache.org/thread.html/rf232eecd47fdc44520192810560303073cefd684b321f85e311bad31%40%3Cnotifications.apisix.apache.org%3E
- https://lists.apache.org/thread.html/rf318aeeb4d7a3a312734780b47de83cefb7e6995da0b2cae5c28675c%40%3Cnotifications.apisix.apache.org%3E
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/7SFVYHC7OXTEO4SMBWXDVK6E5IMEYMEE/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/GNKOP2JR5L7KCIZTJRZDCUPJTUONMC5I/
- https://security.netapp.com/advisory/ntap-20210708-0006/Third Party Advisory
- https://support.f5.com/csp/article/K12331123%2C
- https://www.oracle.com/security-alerts/cpuapr2022.htmlPatch, Third Party Advisory
- https://www.oracle.com/security-alerts/cpujan2022.htmlPatch, Third Party Advisory
- https://www.oracle.com/security-alerts/cpuoct2021.htmlPatch, Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.