PT-2017-18557 · Tor+1 · Tor+1

Published

2017-12-01

·

Updated

2024-06-15

·

CVE-2017-8823

CVSS v3.1

8.1

High

VectorAV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Name of the Vulnerable Software and Affected Versions Tor versions 0.2.6 through 0.2.8 before 0.2.8.17 Tor versions 0.2.9 before 0.2.9.14 Tor versions 0.3.0 before 0.3.0.13 Tor versions 0.3.1 before 0.3.1.9 Tor version 0.2.5.16 and earlier
Description The issue is related to a use-after-free error in onion service v2 during intro-point expiration. This occurs because the expiring list is mismanaged in certain error cases.
Recommendations For Tor versions 0.2.6 through 0.2.8 before 0.2.8.17, update to version 0.2.8.17 or later. For Tor versions 0.2.9 before 0.2.9.14, update to version 0.2.9.14 or later. For Tor versions 0.3.0 before 0.3.0.13, update to version 0.3.0.13 or later. For Tor versions 0.3.1 before 0.3.1.9, update to version 0.3.1.9 or later. For Tor version 0.2.5.16 and earlier, update to version 0.2.5.16 or later.

Fix

Use After Free

Found an issue in the description? Have something to add? Feel free to write us 👾

Weakness Enumeration

Related Identifiers

ALT-PU-2017-2718
CVE-2017-8823
DSA-4054-1
MGASA-2017-0444
OPENSUSE-SU-2017:3201-1
OPENSUSE-SU-2017:3203-1
OPENSUSE-SU-2024:11469-1

Affected Products

Alt Linux
Tor