Improper Input Validation Affecting tor package, versions [,0.2.1.29)


Severity

Recommended
0.0
medium
0
10

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

Threat Intelligence

EPSS
3.1% (91st percentile)

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  • Snyk IDSNYK-UNMANAGED-TOR-2371352
  • published26 Jan 2022
  • disclosed19 Jan 2011
  • creditUnknown

Introduced: 19 Jan 2011

CVE-2011-0491  (opens in a new tab)
CWE-20  (opens in a new tab)

How to fix?

Upgrade tor to version 0.2.1.29 or higher.

Overview

Affected versions of this package are vulnerable to Improper Input Validation. The tor_realloc function in Tor before 0.2.1.29 and 0.2.2.x before 0.2.2.21-alpha does not validate a certain size value during memory allocation, which might allow remote attackers to cause a denial of service (daemon crash) via unspecified vectors, related to "underflow errors."

CVSS Scores

version 3.1