#VU36299 Buffer overflow in Exiv2 - CVE-2018-20097

Vulnerability identifier: #VU36299

Vulnerability risk: Medium

CVSSv4.0: 4.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2018-20097

CWE-ID: CWE-119

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Exiv2
Universal components / Libraries / Libraries used by multiple products

Vendor: GNU

Description

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

There is a SEGV in Exiv2::Internal::TiffParserWorker::findPrimaryGroups of tiffimage_int.cpp in Exiv2 0.27-RC3. A crafted input will lead to a remote denial of service attack.

Mitigation
Install update from vendor's website.

Vulnerable software versions

Exiv2: 0.16 - 0.26

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External links
https://access.redhat.com/errata/RHSA-2019:2101
https://github.com/Exiv2/exiv2/issues/590
https://github.com/TeamSeri0us/pocs/tree/master/exiv2/20181206
https://lists.debian.org/debian-lts-announce/2019/02/msg00038.html
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/ZXCEKTYF7HLM6VH2WCWO2HXTJH37MBLA/

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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.