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HistoryAug 23, 2021 - 3:13 p.m.

[SECURITY] [DSA 4961-1] tor security update

2021-08-2315:13:56
lists.debian.org
21

5 Medium

CVSS2

Attack Vector

NETWORK

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

PARTIAL

AV:N/AC:L/Au:N/C:N/I:N/A:P

7.5 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

0.002 Low

EPSS

Percentile

64.9%


Debian Security Advisory DSA-4961-1 [email protected]
https://www.debian.org/security/ Salvatore Bonaccorso
August 23, 2021 https://www.debian.org/security/faq


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: [email protected]

5 Medium

CVSS2

Attack Vector

NETWORK

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

PARTIAL

AV:N/AC:L/Au:N/C:N/I:N/A:P

7.5 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

0.002 Low

EPSS

Percentile

64.9%