CVE-2018-15209

Public on

Last Modified: UTC

Description

The CVE Program describes this issue as:

ChopUpSingleUncompressedStrip in tif_dirread.c in LibTIFF 4.0.9 allows remote attackers to cause a denial of service (heap-based buffer overflow and application crash) or possibly have unspecified other impact via a crafted TIFF file, as demonstrated by tiff2pdf.

Statement

Red Hat has determined that this vulnerability has a moderate severity due to a series of factors. Firstly, the attack vector necessary to successfully exploit this flaw is local, given that the attacker must rely on user interaction (by tricking or fooling them into opening a maliciously-crafted TIFF file). Secondly, the CIA impact of this vulnerability should be assumed to be Low for all three vectors, due to to the fact that a successful crash would only impact the LibTIFF application itself, the application does not inherently have access to nor handle sensitive or confidential information, and since it causes a DoS due to heap-based buffer overflow there is little indication that this will modify or alter data. This issue did not affect the versions of libtiff as shipped with Red Hat Enterprise Linux 5, 6, and 7.

Red Hat has determined that this vulnerability has a moderate severity due to a series of factors. Firstly, the attack vector necessary to successfully exploit this flaw is local, given that the attacker must rely on user interaction (by tricking or fooling them into opening a maliciously-crafted TIFF file). Secondly, the CIA impact of this vulnerability should be assumed to be Low for all three vectors, due to to the fact that a successful crash would only impact the LibTIFF application itself, the application does not inherently have access to nor handle sensitive or confidential information, and since it causes a DoS due to heap-based buffer overflow there is little indication that this will modify or alter data.

This issue did not affect the versions of libtiff as shipped with Red Hat Enterprise Linux 5, 6, and 7.

Additional information

  • Bugzilla 1614051: libtiff: Heap-based buffer overflow in ChopUpSingleUncompressedStrip in tif_dirread.c
  • CWE-122: Heap-based Buffer Overflow
  • FAQ: Frequently asked questions about CVE-2018-15209

Common Vulnerability Scoring System (CVSS) Score Details

Important note

CVSS scores for open source components depend on vendor-specific factors (e.g. version or build chain). Therefore, Red Hat's score and impact rating can be different from NVD and other vendors. Red Hat remains the authoritative CVE Naming Authority (CNA) source for its products and services (see Red Hat classifications).

CVSS v3 Score Breakdown
Red HatNVD

CVSS v3 Base Score

5.3

8.8

Attack Vector

Local

Network

Attack Complexity

Low

Low

Privileges Required

None

None

User Interaction

Required

Required

Scope

Unchanged

Unchanged

Confidentiality Impact

Low

High

Integrity Impact

Low

High

Availability Impact

Low

High

CVSS v3 Vector

Red Hat: CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L

NVD: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Frequently Asked Questions

Why is Red Hat's CVSS v3 score or Impact different from other vendors?

My product is listed as "Under investigation" or "Affected", when will Red Hat release a fix for this vulnerability?

What can I do if my product is listed as "Will not fix"?

What can I do if my product is listed as "Fix deferred"?

What is a mitigation?

I have a Red Hat product but it is not in the above list, is it affected?

Why is my security scanner reporting my product as vulnerable to this vulnerability even though my product version is fixed or not affected?

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