CVE-2021-34550: Buffer Overflow
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
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade
alpine/torto a version that resolves this vulnerability.Fixed in 0.4.4.9-r0
Event History
Frequently Asked Questions
What is CVE-2021-34550?
CVE-2021-34550 is an issue discovered in Tor before 0.4.6.5, which allows out-of-bounds memory access and a client crash via a crafted onion service descriptor.
What is the severity of CVE-2021-34550?
The severity of CVE-2021-34550 is high, with a severity value of 7.5.
Which software is affected by CVE-2021-34550?
Tor versions up to and including 0.4.6.5, 0.3.5.15, 0.4.4.9, 0.4.5.9, and 0.4.6.0 are affected by CVE-2021-34550.
How can I fix CVE-2021-34550?
To fix CVE-2021-34550, users should update to Tor version 0.4.6.5 or later.
Where can I find more information about CVE-2021-34550?
More information about CVE-2021-34550 can be found at the following references: [1] [2] [3].