Bug 2235458 (CVE-2020-18768)

Summary: CVE-2020-18768 libtiff: heap-based buffer overflow in _TIFFmemcpy() in tif_unix.c
Product: [Other] Security Response Reporter: Guilherme de Almeida Suckevicz <gsuckevi>
Component: vulnerabilityAssignee: Product Security <prodsec-ir-bot>
Status: NEW --- QA Contact:
Severity: low Docs Contact:
Priority: low    
Version: unspecifiedCC: bdettelb, caswilli, doconnor, hkataria, jburrell, jsherril, kaycoth, kholdawa, kshier, lcouzens, mskarbek, nforro, rh-spice-bugs, teagle
Target Milestone: ---Keywords: Security
Target Release: ---   
Hardware: All   
OS: Linux   
Whiteboard:
Fixed In Version: libtiff 4.1.0 Doc Type: If docs needed, set a value
Doc Text:
A heap-based buffer overflow exists in libtiff in TIFFmemcpy. This flaw allows an attacker to craft a specific TIFF file, possibly causing a denial of service that results in a loss of the system’s availability.
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:
Bug Depends On: 2235763, 2235764, 2235765, 2235767    
Bug Blocks: 2235459    

Description Guilherme de Almeida Suckevicz 2023-08-28 17:45:22 UTC 
There exists one heap buffer overflow in _TIFFmemcpy in tif_unix.c in libtiff 4.0.10, which allows an attacker to cause a denial-of-service through a crafted tiff file.

Reference:
http://bugzilla.maptools.org/show_bug.cgi?id=2848
Comment 2 Guilherme de Almeida Suckevicz 2023-08-29 16:49:48 UTC 
Created iv tracking bugs for this issue:

Affects: fedora-all [bug 2235767]