#VU37440 Input validation error in PyBitmessage - CVE-2018-1000070

Vulnerability identifier: #VU37440

Vulnerability risk: High

CVSSv4.0: 5.7 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber]

CVE-ID: CVE-2018-1000070

CWE-ID: CWE-20

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
PyBitmessage
Client/Desktop applications / Messaging software

Vendor: Bitmessage

Description

The vulnerability allows a remote non-authenticated attacker to execute arbitrary code.

Bitmessage PyBitmessage version v0.6.2 (and introduced in or after commit 8ce72d8d2d25973b7064b1cf76a6b0b3d62f0ba0) contains a Eval injection vulnerability in main program, file src/messagetypes/__init__.py function constructObject that can result in Code Execution. This attack appears to be exploitable via remote attacker using a malformed message which must be processed by the victim - e.g. arrive from any sender on bitmessage network. This vulnerability appears to have been fixed in v0.6.3.

Mitigation
Install update from vendor's website.

Vulnerable software versions

PyBitmessage: 0.6.2

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External links
https://github.com/Bitmessage/PyBitmessage/commit/3a8016d31f517775d226aa8b902480f4a3a148a9#comments

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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.