Out-of-bounds write in LibTIFF - CVE-2018-18557

Vulnerability identifier: #VU15967

CSH Severity: High

CVSS v4: 9.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]

CVE-ID: CVE-2018-18557

CWE-ID: CWE-787

Exploitation vector: Remote access

Exploit availability: No public exploit available

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to decoding of arbitrarily-sized JBIG into a buffer, ignoring the buffer size. A remote unauthenticated attacker can supply specially crafted input, trigger a tif_jbig.c JBIGDecode out-of-bounds write and execute arbitrary code with elevated privileges.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

LibTIFF
Arch Linux
Amazon Linux AMI
Gentoo Linux
Debian Linux
Red Hat Enterprise Linux for IBM z Systems
Red Hat Enterprise Linux for Scientific Computing
Red Hat Enterprise Linux Desktop
Red Hat Enterprise Linux Workstation
Red Hat Enterprise Linux Server
Opensuse
Fedora
tiff (Alpine package)
libtiff
BIG-IP AAM
Data Computing Appliance (DCA)

Install update from vendor's website.

tiff (Alpine package) - update to 4.0.10-r0
libtiff - addressed in versions 4.0.10-1.fc27, 4.0.10-1.fc28, 4.0.10-1.fc29
Data Computing Appliance (DCA) - update to 4.3.0.0

• https://gitlab.com/libtiff/libtiff/merge_requests/38

• Arch Linux update for libtiff
• Arch Linux update for lib32-libtiff
• OpenSUSE Linux update for tiff
• OpenSUSE Linux update for tiff
• Debian update for tiff
• Gentoo update for libTIFF
• Red Hat update for libtiff
• Amazon Linux AMI update for libtiff
• Out-of-bounds write in tiff (Alpine package)
• Buffer overflow in LibTIFF in BIG-IP AAM
• Multiple vulnerabilities in Dell EMC Data Computing Appliance (DCA)
• Fedora 29 update for libtiff
• Fedora 27 update for libtiff
• Fedora 28 update for libtiff