Vulnerability CVE-2020-10593
Published: 2020-03-23

Description:
Tor before 0.3.5.10, 0.4.x before 0.4.1.9, and 0.4.2.x before 0.4.2.7 allows remote attackers to cause a Denial of Service (memory leak), aka TROVE-2020-004. This occurs in circpad_setup_machine_on_circ because a circuit-padding machine can be negotiated twice on the same circuit.

Type:

CWE-401

 (Improper Release of Memory Before Removing Last Reference ('Memory Leak'))

CVSS2 => (AV:N/AC:L/Au:N/C:N/I:N/A:P)

CVSS Base Score
Impact Subscore
Exploitability Subscore
5/10
2.9/10
10/10
Exploit range
Attack complexity
Authentication
Remote
Low
No required
Confidentiality impact
Integrity impact
Availability impact
None
None
Partial
Affected software
Torproject -> TOR 

 References:
http://lists.opensuse.org/opensuse-security-announce/2020-03/msg00045.html
http://lists.opensuse.org/opensuse-security-announce/2020-03/msg00052.html
https://security.gentoo.org/glsa/202003-50
https://trac.torproject.org/projects/tor/ticket/33619
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