#VU63795 Out-of-bounds read in LibTIFF - CVE-2022-22844

Vulnerability identifier: #VU63795

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-2022-22844

CWE-ID: CWE-125

Exploitation vector: Network

Exploit availability: No

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

Vendor: LibTIFF

Description

The vulnerability allows a remote attacker to perform a denial of service attack.

The vulnerability exists due to a boundary condition in the _TIFFmemcpy() function in tif_unix.c in certain situations involving a custom tag and 0x0200 as the second word of the DE field. A remote attacker can pass a specially crafted file and perform a denial of service attack.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

LibTIFF: 3.9.6 - 4.3.0

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External links
https://gitlab.com/libtiff/libtiff/-/issues/355
https://gitlab.com/libtiff/libtiff/-/merge_requests/287
https://lists.debian.org/debian-lts-announce/2022/03/msg00001.html
https://security.netapp.com/advisory/ntap-20220311-0002/
https://www.debian.org/security/2022/dsa-5108
https://bugzilla.redhat.com/show_bug.cgi?id=2042603

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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.