What is CVE-2020-35573?

CVE-2020-35573 is a high-severity vulnerability in Postsrsd Project, classified under Excessive Iteration. CVSS score: 7.5/10. Published 2020-12-20.

How severe is CVE-2020-35573?

High severity. CVSS v3 base score is 7.5 out of 10.

Vulnerability in Postsrsd Project

CVE-2020-35573

srs2.c in PostSRSd before 1.10 allows remote attackers to cause a denial of service (CPU consumption) via a long timestamp tag in an SRS address.

Published 2020-12-20 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.027 (85.4th percentile), scored 2026-10-03.

Low probability of exploitation in the next 30 days, but still tracked. 85th percentile — 85.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.027 · newest: 0.027 · change: +0.000

Affected products

Postsrsd Project
Debian Linux — versions 9.0

Weakness classification (CWE)

CWE-834 — Excessive Iteration

References

github.com/roehling/postsrsd/commit/4733fb11f6bec6524bb8518c5e1a699288c26bac (Patch, Third Party Advisory)
lists.debian.org/debian-lts-announce/2020/12/msg00031.html (mailing-list, Mailing List, Third Party Advisory)
security.gentoo.org/glsa/202107-08 (vendor-advisory, Third Party Advisory)

Frequently asked questions

What is CVE-2020-35573?: CVE-2020-35573 is a high-severity vulnerability in Postsrsd Project, classified under Excessive Iteration. CVSS score: 7.5/10. Published 2020-12-20.
How severe is CVE-2020-35573?: High severity. CVSS v3 base score is 7.5 out of 10.