Debian Security Advisory

DLA-2587-1 privoxy -- LTS security update

Date Reported:
09 Mar 2021
Affected Packages:
Security database references:
In Mitre's CVE dictionary: CVE-2021-20272, CVE-2021-20273, CVE-2021-20275, CVE-2021-20276.
More information:

Multiple vulnerabilites were discovered in privoxy, a web proxy with advanced filtering capabilities.

  • CVE-2021-20272

    An assertion failure could be triggered with a crafted CGI request leading to server crash.

  • CVE-2021-20273

    A crash can occur via a crafted CGI request if Privoxy is toggled off.

  • CVE-2021-20275

    An invalid read of size two may occur in chunked_body_is_complete() leading to denial of service.

  • CVE-2021-20276

    Invalid memory access with an invalid pattern passed to pcre_compile() may lead to denial of service.

For Debian 9 stretch, these problems have been fixed in version 3.0.26-3+deb9u2.

We recommend that you upgrade your privoxy packages.

For the detailed security status of privoxy please refer to its security tracker page at:

Further information about Debian LTS security advisories, how to apply these updates to your system and frequently asked questions can be found at: