PT-2020-12223 · Tor+2 · Tor+2
Tobias Pulls
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Published
2019-05-07
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Updated
2024-06-15
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CVE-2020-10593
CVSS v3.1
7.5
High
| Vector | AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
Name of the Vulnerable Software and Affected Versions
Tor versions 0.3.5.10 and earlier, 0.4.x through 0.4.1.8, and 0.4.2.x through 0.4.2.6
Description
The issue allows remote attackers to cause a Denial of Service (memory leak). This occurs in the
circpad setup machine on circ function because a circuit-padding machine can be negotiated twice on the same circuit.Recommendations
For Tor versions 0.3.5.10 and earlier, update to version 0.3.5.10 or later.
For Tor versions 0.4.x through 0.4.1.8, update to version 0.4.1.9 or later.
For Tor versions 0.4.2.x through 0.4.2.6, update to version 0.4.2.7 or later.
As a temporary workaround, consider disabling the
circpad setup machine on circ function until a patch is available.Fix
DoS
Memory Leak
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Weakness Enumeration
Related Identifiers
Affected Products
Alt Linux
Suse
Tor