Buffer overflow in Postgresql
CVE-2020-21469
An issue was discovered in PostgreSQL 12.2 allows attackers to cause a denial of service via repeatedly sending SIGHUP signals. NOTE: this is disputed by the vendor because untrusted users cannot send SIGHUP signals; they can only be sent by a PostgreSQL superuser, a user with pg_reload_conf access, or a user with sufficient privileges at the OS level (the postgres account or the root account).
Vulnerability class: Buffer Overflow
EPSS: 0.004 (28.7th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 4.4 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H.
Affected products
- Postgresql — versions 12.2
- N/a — versions n/a
Weakness classification (CWE)
Public proof-of-concept exploits
References
- cve@mitre.org (Product)
- cve@mitre.org (Exploit, Mailing List, Vendor Advisory)
- cve@mitre.org (Mailing List)
Frequently asked questions
- What is CVE-2020-21469?
- CVE-2020-21469 is a medium-severity vulnerability in Postgresql, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 4.4/10. Published 2023-08-22.
- How severe is CVE-2020-21469?
- Medium severity. CVSS v3 base score is 4.4 out of 10.
- Is CVE-2020-21469 known to be exploited?
- 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.