NULL pointer dereference in tor (Alpine package)



Risk Low
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2018-0490
CWE-ID CWE-476
Exploitation vector Network
Public exploit N/A
Vulnerable software
Subscribe 		tor (Alpine package)
Operating systems & Components / Operating system package or component

Vendor Alpine Linux Development Team

Security Bulletin

This security bulletin contains one low risk vulnerability.

1) NULL pointer dereference

EUVDB-ID: #VU12293

Risk: Low

CVSSv3.1: 4.6 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:U/RL:O/RC:C]

CVE-ID: CVE-2018-0490

CWE-ID: CWE-476 - NULL Pointer Dereference

Exploit availability: No

Description

The vulnerability allows a remote attacker to cause DoS condition on the target system.

The weakness exists in the directory-authority protocol-list subprotocol implementation due to NULL pointer dereference. A remote attacker can cause the service to crash via a misformatted relay descriptor that is mishandled during voting.

Mitigation

Install update from vendor's website.

Vulnerable software versions

tor (Alpine package): 0.3.1.9-r0

CPE2.3 External links

http://git.alpinelinux.org/aports/commit/?id=d17a014c3419283d71293e0cd45a8c7178393632
http://git.alpinelinux.org/aports/commit/?id=2185d3b8d25a0f2e63d09e74b9c29683ef41bc2d
http://git.alpinelinux.org/aports/commit/?id=53f4e4e2a7a04028c529a6ac04f59cd54ee834c4
http://git.alpinelinux.org/aports/commit/?id=e9d50cc6a8aa0e01b165e72e71da208450ade693


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.



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