Vulnerability · Published Mar 25, 2021 · Assigned by redhat
CVE-2021-20213
High 7.5
In plain English
A high-severity null pointer dereference in privoxy. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 1.6% (higher than 75% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS NVD)7.5High
Exploit odds (30 days)1.6%top 24.5% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack toolingNoneno public tooling known
Official description
A flaw was found in Privoxy in versions before 3.0.29. Dereference of a NULL-pointer that could result in a crash if accept-intercepted-requests was enabled, Privoxy failed to get the request destination from the Host header and a memory allocation failed.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine:v3.20 | privoxy | 3.0.29-r0 | ALPINE-CVE-2021-20213 |
| Alpine:v3.21 | privoxy | 3.0.29-r0 | ALPINE-CVE-2021-20213 |
| Alpine:v3.22 | privoxy | 3.0.29-r0 | ALPINE-CVE-2021-20213 |
| Alpine:v3.23 | privoxy | 3.0.29-r0 | ALPINE-CVE-2021-20213 |
| Alpine:v3.24 | privoxy | 3.0.29-r0 | ALPINE-CVE-2021-20213 |
| Debian:12 | privoxy | 3.0.29-1 | DEBIAN-CVE-2021-20213 |
| Debian:13 | privoxy | 3.0.29-1 | DEBIAN-CVE-2021-20213 |
| Debian:14 | privoxy | 3.0.29-1 | DEBIAN-CVE-2021-20213 |
Affected products (as reported)
Weakness: CWE-476
References
- https://www.privoxy.org/3.0.29/user-manual/whatsnew.html x_refsource_MISC
- https://bugzilla.redhat.com/show_bug.cgi?id=1928739 x_refsource_MISC
- GLSA-202107-16 vendor-advisory, x_refsource_GENTOO