Reachable Assertion in tor (Alpine package)

Published: 2017-06-12

Risk	Medium
Patch available	YES
Number of vulnerabilities	1
CVE-ID	CVE-2017-0376
CWE-ID	CWE-617
Exploitation vector	Network
Public exploit	N/A
Vulnerable software	tor (Alpine package) Operating systems & Components / Operating system package or component
Vendor	Alpine Linux Development Team

Security Bulletin

This security bulletin contains one medium risk vulnerability.

1) Reachable Assertion

EUVDB-ID: #VU31418

Risk: Medium

CVSSv4.0: 6.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2017-0376

CWE-ID: CWE-617 - Reachable Assertion

Exploit availability: No

Description

The vulnerability allows a remote non-authenticated attacker to perform a denial of service (DoS) attack.

The hidden-service feature in Tor before 0.3.0.8 allows a denial of service (assertion failure and daemon exit) in the connection_edge_process_relay_cell function via a BEGIN_DIR cell on a rendezvous circuit.

Mitigation

Install update from vendor's website.

Vulnerable software versions

tor (Alpine package): 0.3.0.6-r0

CPE2.3

cpe:2.3:o:alpine:tor_alpine_package:0.3.0.6-r0:*:*:*:*:alpine_linux:*:3.5

External links

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.