Use After Free Affecting tor package, versions <0.3.1.9-r0


Severity

Recommended
0.0
high
0
10

CVSS assessment made by Snyk's Security Team. Learn more

Threat Intelligence

EPSS
0.27% (68th percentile)

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  • Snyk IDSNYK-ALPINE37-TOR-467669
  • published22 Sept 2019
  • disclosed22 Sept 2019
  • creditUnknown

Introduced: 22 Sep 2019

CVE-2017-8823  (opens in a new tab)
CWE-416  (opens in a new tab)

How to fix?

Upgrade Alpine:3.7 tor to version 0.3.1.9-r0 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream tor package and not the tor package as distributed by Alpine. See How to fix? for Alpine:3.7 relevant fixed versions and status.

In Tor before 0.2.5.16, 0.2.6 through 0.2.8 before 0.2.8.17, 0.2.9 before 0.2.9.14, 0.3.0 before 0.3.0.13, and 0.3.1 before 0.3.1.9, there is a use-after-free in onion service v2 during intro-point expiration because the expiring list is mismanaged in certain error cases, aka TROVE-2017-013.