#VU29110 Out-of-bounds read in libexif - CVE-2017-7544

Vulnerability identifier: #VU29110

Vulnerability risk: Medium

CVSSv4.0: 1.2 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:L/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2017-7544

CWE-ID: CWE-125

Exploitation vector: Network

Exploit availability: No

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

Vendor: libexif.sourceforge.net

Description

The vulnerability allows a remote attacker to gain access to potentially sensitive information.

The vulnerability exists due to improper length computation of the allocated data of an ExifMnote entry within the exif_data_save_data_entry() function in libexif/exif-data.c. A remote attacker can create a specially crafted file, trick the victim into opening it, trigger out-of-bounds read error and read contents of memory on the system.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

libexif: 0.5 - 0.6.21

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External links
https://lists.opensuse.org/opensuse-security-announce/2020-06/msg00017.html
https://lists.debian.org/debian-lts-announce/2020/05/msg00016.html
https://sourceforge.net/p/libexif/bugs/130/
https://usn.ubuntu.com/4277-1/

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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.