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CVE-2021-23017

⚠ī¸ high
Summary

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 Score
7.7
High
EPSS Score
73.2
Exploit Probability
Published Date
2021-06-01
First Seen: 2026-01-05
Last Modified 2024-11-21
Source NVD 🔗
CVSS Vector 3.1 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:L
CWE IDs (Weakness Types)
CWE-193

🔗 References 28

http://mailman.nginx.org/pipermail/nginx-announce/20...
Mailing List Patch Vendor Advisory
http://packetstormsecurity.com/files/167720/Nginx-1....
Third Party Advisory VDB Entry
https://lists.apache.org/thread.html/r37e6b2165f7c91...
https://lists.apache.org/thread.html/r4d4966221ca399...
https://lists.apache.org/thread.html/r6fc5c57b38e93e...
https://lists.apache.org/thread.html/rf232eecd47fdc4...
https://lists.apache.org/thread.html/rf318aeeb4d7a3a...
https://lists.fedoraproject.org/archives/list/packag...
https://lists.fedoraproject.org/archives/list/packag...
https://security.netapp.com/advisory/ntap-20210708-0...
Third Party Advisory
https://support.f5.com/csp/article/K12331123%2C
https://www.oracle.com/security-alerts/cpuapr2022.html
Patch Third Party Advisory
https://www.oracle.com/security-alerts/cpujan2022.html
Patch Third Party Advisory
https://www.oracle.com/security-alerts/cpuoct2021.html
Patch Third Party Advisory
http://mailman.nginx.org/pipermail/nginx-announce/20...
Mailing List Patch Vendor Advisory
http://packetstormsecurity.com/files/167720/Nginx-1....
Third Party Advisory VDB Entry
https://lists.apache.org/thread.html/r37e6b2165f7c91...
https://lists.apache.org/thread.html/r4d4966221ca399...
https://lists.apache.org/thread.html/r6fc5c57b38e93e...
https://lists.apache.org/thread.html/rf232eecd47fdc4...
https://lists.apache.org/thread.html/rf318aeeb4d7a3a...
https://lists.fedoraproject.org/archives/list/packag...
https://lists.fedoraproject.org/archives/list/packag...
https://security.netapp.com/advisory/ntap-20210708-0...
Third Party Advisory
https://support.f5.com/csp/article/K12331123%2C
https://www.oracle.com/security-alerts/cpuapr2022.html
Patch Third Party Advisory
https://www.oracle.com/security-alerts/cpujan2022.html
Patch Third Party Advisory
https://www.oracle.com/security-alerts/cpuoct2021.html
Patch Third Party Advisory

đŸ“Ļ Affected Products 25

Vendor Product Status Affected Versions
fedoraproject fedora Affected
v33
fedoraproject fedora Affected
v34
oracle goldengate Affected
< 21.4.0.0.0
oracle communications_operations_monitor Affected
v3.4
oracle communications_operations_monitor Affected
v4.2
oracle communications_operations_monitor Affected
v4.3
oracle communications_operations_monitor Affected
v4.4
netapp ontap_select_deploy_administration_utility Affected
v-
oracle communications_session_border_controller Affected
v8.4
oracle communications_session_border_controller Affected
v9.0
openresty openresty Affected
< 1.19.3.2
oracle enterprise_communications_broker Affected
v3.3.0
oracle enterprise_session_border_controller Affected
v8.4
oracle enterprise_session_border_controller Affected
v9.0
f5 nginx Affected
≥ 0.6.18 < 1.20.1
oracle communications_control_plane_monitor Affected
v3.4
oracle communications_control_plane_monitor Affected
v4.2
oracle communications_control_plane_monitor Affected
v4.3
oracle communications_control_plane_monitor Affected
v4.4
oracle enterprise_telephony_fraud_monitor Affected
v3.4
oracle enterprise_telephony_fraud_monitor Affected
v4.2
oracle enterprise_telephony_fraud_monitor Affected
v4.3
oracle enterprise_telephony_fraud_monitor Affected
v4.4
oracle communications_fraud_monitor Affected
≥ 3.4 ≤ 4.4
oracle blockchain_platform Affected
< 21.1.2

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CVE-2025-0167 ℹī¸ low 3.4 0.2 When asked to use a `.netrc` file for credentials **and** to follow HTTP redirects, curl could leak the password used fo... 2025-02-05
CVE-2025-23419 đŸ”ļ medium 4.3 0.6 When multiple server blocks are configured to share the same IP address and port, an attacker can use session resumption... 2025-02-05
CVE-2024-11053 ℹī¸ low 3.4 1.0 When asked to both use a `.netrc` file for credentials and to follow HTTP redirects, curl could leak the password used f... 2024-12-11
CVE-2023-4134 đŸ”ļ medium 5.5 0.0 A use-after-free vulnerability was found in the cyttsp4_core driver in the Linux kernel. This issue occurs in the device... 2024-11-14
These CVEs affect the same products