NULL pointer dereference in Privoxy

CVE-2021-20274

A flaw was found in privoxy before 3.0.32. A crash may occur due a NULL-pointer dereference when the socks server misbehaves.

EPSS: 0.019 (77.7th percentile) — read the EPSS interpretation.

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.

Affected products

Privoxy
N/a Privoxy — versions privoxy 3.0.32

Weakness classification (CWE)

CWE-476 — NULL Pointer Dereference

Public proof-of-concept exploits

MegaManSec/privoxy

References

secalert@redhat.com (x_refsource_MISC, Release Notes, Vendor Advisory)
secalert@redhat.com (Patch, Third Party Advisory, x_refsource_MISC, Issue Tracking)
secalert@redhat.com (vendor-advisory, Third Party Advisory, x_refsource_GENTOO)

Frequently asked questions

What is CVE-2021-20274?: CVE-2021-20274 is a high-severity vulnerability in Privoxy, classified under NULL Pointer Dereference. CVSS score: 7.5/10. Published 2021-03-09.
How severe is CVE-2021-20274?: High severity. CVSS v3 base score is 7.5 out of 10.
Is CVE-2021-20274 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.