Vigil@nce - zlib: five vulnerabilities
February 2017 by Vigil@nce
This bulletin was written by Vigil@nce : https://vigilance.fr/offer
SYNTHESIS OF THE VULNERABILITY
An attacker can use several vulnerabilities of zlib.
Impacted products: openSUSE, openSUSE Leap, zlib.
Severity: 2/4.
Creation date: 05/12/2016.
DESCRIPTION OF THE VULNERABILITY
Several vulnerabilities were announced in zlib.
An attacker can generate a memory corruption via Deflate External
Linkage, in order to trigger a denial of service, and possibly to
run code. [severity:2/4]
A pointer error may have a consequence. [severity:1/4]
An attacker can force a read at an invalid address via inftrees.c,
in order to trigger a denial of service, or to obtain sensitive
information. [severity:1/4; CVE-2016-9840, CVE-2016-9841]
A negative number shift is undefined. [severity:1/4; CVE-2016-9842]
An attacker can force a read at an invalid address via Big-endian
Pointer, in order to trigger a denial of service, or to obtain
sensitive information. [severity:1/4; CVE-2016-9843]
ACCESS TO THE COMPLETE VIGIL@NCE BULLETIN
https://vigilance.fr/vulnerability/zlib-five-vulnerabilities-21262