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CVE-2021-34550

Date: June 29, 2021

An issue was discovered in Tor before 0.4.6.5, aka TROVE-2021-006. The v3 onion service descriptor parsing allows out-of-bounds memory access, and a client crash, via a crafted onion service descriptor

Language: C

Severity Score

Related Resources (9)

https://gitlab.torproject.org/tpo/core/tor/-/commit/f57b5c48e0aa01acd84a194fe4657a0d1cee04cf
https://security-tracker.debian.org/tracker/CVE-2021-34550
https://security.alpinelinux.org/vuln/CVE-2021-34550
https://nvd.nist.gov/vuln/detail/CVE-2021-34550
https://security.gentoo.org/glsa/202107-25
https://blog.torproject.org/node/2041
https://gitlab.torproject.org/tpo/core/tor/-/issues/40392
https://people.canonical.com/~ubuntu-security/cve/CVE-2021-34550
https://www.mend.io/vulnerability-database/CVE-2021-34550

Severity Score

Weakness Type (CWE)

Improper Restriction of Operations within the Bounds of a Memory Buffer

CWE-119

CVSS v3.1

Base Score:
Attack Vector (AV): NETWORK
Attack Complexity (AC): LOW
Privileges Required (PR): NONE
User Interaction (UI): NONE
Scope (S): UNCHANGED
Confidentiality (C): NONE
Integrity (I): NONE
Availability (A): HIGH

CVSS v2

Base Score:
Access Vector (AV): NETWORK
Access Complexity (AC): LOW
Authentication (AU): NONE
Confidentiality (C): NONE
Integrity (I): NONE
Availability (A): PARTIAL
Additional information:

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