Vulnerability identifier: #VU48481

Vulnerability risk: High

CVSSv3.1: 8.1 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:U/RC:C]

CVE-ID: CVE-2017-18926

CWE-ID: CWE-119

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Raptor RDF Syntax Library
Universal components / Libraries / Libraries used by multiple products

Vendor: dajobe

Description

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to a boundary error within the raptor_xml_writer_start_element_common() function in raptor_xml_writer.c. A remote attacker can create a specially crafted file, trick the victim into opening it, trigger memory corruption and execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Mitigation
Cybersecurity Help is currently unaware of any official solution to address this vulnerability.

Vulnerable software versions

Raptor RDF Syntax Library: 2.1.9.0 - 2.2.0.15

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External links
http://www.openwall.com/lists/oss-security/2020/11/13/1
http://www.openwall.com/lists/oss-security/2020/11/13/2
http://www.openwall.com/lists/oss-security/2020/11/14/2
http://www.openwall.com/lists/oss-security/2020/11/16/2
http://www.openwall.com/lists/oss-security/2020/11/16/3
http://github.com/LibreOffice/core/blob/master/external/redland/raptor/0001-Calcualte-max-nspace-declarations-correctly-for-XML-.patch.1
http://lists.debian.org/debian-lts-announce/2020/11/msg00012.html
http://www.debian.org/security/2020/dsa-4785
http://www.openwall.com/lists/oss-security/2017/06/07/1

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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.