#VU28797 Buffer overflow in Exiv2 - CVE-2019-17402

Vulnerability identifier: #VU28797

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-2019-17402

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 attacker to execute arbitrary code on the target system.

The vulnerability exists due to a boundary in Exiv2::getULong() function in types.cpp when called from Exiv2::Internal::CiffDirectory::readDirectory in crwimage_int.cpp. A remote attacker can pass specially crafted data to the application, trigger memory corruption and crash the service.

Mitigation
Install update from vendor's website.

Vulnerable software versions

Exiv2: 0.16 - 0.27.2

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External links
https://github.com/Exiv2/exiv2/issues/1019
https://lists.debian.org/debian-lts-announce/2019/12/msg00001.html
https://usn.ubuntu.com/4159-1/

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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.