Protect yourself against future threats.
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AUSCERT External Security Bulletin Redistribution
ESB-2021.2847
tor security update
24 August 2021
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AusCERT Security Bulletin Summary
---------------------------------
Product: tor
Publisher: Debian
Operating System: Debian GNU/Linux
UNIX variants (UNIX, Linux, OSX)
Windows
Impact/Access: Denial of Service -- Remote/Unauthenticated
Resolution: Patch/Upgrade
CVE Names: CVE-2021-38385
Original Bulletin:
http://www.debian.org/security/2021/dsa-4961
Comment: This advisory references vulnerabilities in products which run on
platforms other than Debian. It is recommended that administrators
running tor check for an updated version of the software for their
operating system.
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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/
Mailing list: debian-security-announce@lists.debian.org
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