A tor security update has been released for Debian GNU/Linux 10 and 11 to address a flaw in the signature verification code.
DSA 4961-1: tor security update
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Debian Security Advisory DSA-4961-1 security@debian.org
https://www.debian.org/security/ Salvatore Bonaccorso
August 23, 2021 https://www.debian.org/security/faq
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Package : tor
CVE ID : CVE-2021-38385
Henry de Valence reported a flaw in the signature verification code in
Tor, a connection-based low-latency anonymous communication system. A
remote attacker can take advantage of this flaw to cause an assertion
failure, resulting in denial of service.
For the oldstable distribution (buster), this problem has been fixed
in version 0.3.5.16-1.
For the stable distribution (bullseye), this problem has been fixed in
version 0.4.5.10-1~deb11u1.
We recommend that you upgrade your tor packages.
For the detailed security status of tor please refer to its security
tracker page at:
https://security-tracker.debian.org/tracker/tor
Further information about Debian Security Advisories, how to apply
these updates to your system and frequently asked questions can be
found at: https://www.debian.org/security/
