CVE Vulnerabilities

CVE-2014-9844

Out-of-bounds Read

Published: Mar 20, 2017 | Modified: Oct 30, 2018
CVSS 3.x
5.5
MEDIUM
Source:
NVD
CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
CVSS 2.x
4.3 MEDIUM
AV:N/AC:M/Au:N/C:N/I:N/A:P
RedHat/V2
RedHat/V3
Ubuntu

The ReadRLEImage function in coders/rle.c in ImageMagick 6.8.9.9 allows remote attackers to cause a denial of service (out-of-bounds read) via a crafted image file.

Weakness

The product reads data past the end, or before the beginning, of the intended buffer.

Affected Software

Name Vendor Start Version End Version
Suse_linux_enterprise_workstation_extension Opensuse_project 12.0 12.0
Leap Opensuse_project 42.1 42.1
Suse_linux_enterprise_server Opensuse_project 12.0 12.0
Suse_linux_enterprise_desktop Opensuse_project 12.0 12.0
Suse_linux_enterprise_debuginfo Opensuse_project 11.0 11.0
Suse_linux_enterprise_software_development_kit Opensuse_project 12.0 12.0
Studio_onsite Suse 1.3 1.3
Suse_linux_enterprise_server Opensuse_project 11.0 11.0
Suse_linux_enterprise_software_development_kit Opensuse_project 11.0 11.0
Opensuse Opensuse 13.2 13.2

Potential Mitigations

  • Assume all input is malicious. Use an “accept known good” input validation strategy, i.e., use a list of acceptable inputs that strictly conform to specifications. Reject any input that does not strictly conform to specifications, or transform it into something that does.
  • When performing input validation, consider all potentially relevant properties, including length, type of input, the full range of acceptable values, missing or extra inputs, syntax, consistency across related fields, and conformance to business rules. As an example of business rule logic, “boat” may be syntactically valid because it only contains alphanumeric characters, but it is not valid if the input is only expected to contain colors such as “red” or “blue.”
  • Do not rely exclusively on looking for malicious or malformed inputs. This is likely to miss at least one undesirable input, especially if the code’s environment changes. This can give attackers enough room to bypass the intended validation. However, denylists can be useful for detecting potential attacks or determining which inputs are so malformed that they should be rejected outright.
  • To reduce the likelihood of introducing an out-of-bounds read, ensure that you validate and ensure correct calculations for any length argument, buffer size calculation, or offset. Be especially careful of relying on a sentinel (i.e. special character such as NUL) in untrusted inputs.

References