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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/source-package/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/

Mailing list: debian-security-announce@lists.debian.org