Vulnerabilities
Misconfiguration
Runtime Security
Compliance
CVE Vulnerabilities

CVE-2019-11036

Out-of-bounds Read

Published: May 03, 2019 | Modified: Nov 07, 2023
CVSS 3.x
9.1
CRITICAL
Source:
NVD
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
CVSS 2.x
6.4 MEDIUM
AV:N/AC:L/Au:N/C:P/I:N/A:P
RedHat/V2
RedHat/V3
4 LOW
CVSS:3.0/AV:L/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N
Ubuntu
LOW
Additional information
NVDhttps://nvd.nist.gov/vuln/detail/CVE-2019-11036
CWEhttps://cwe.mitre.org/data/definitions/125.html

When processing certain files, PHP EXIF extension in versions 7.1.x below 7.1.29, 7.2.x below 7.2.18 and 7.3.x below 7.3.5 can be caused to read past allocated buffer in exif_process_IFD_TAG function. This may lead to information disclosure or crash.

Weakness

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

Affected Software

Name Vendor Start Version End Version
Php Php 7.1.0 (including) 7.1.29 (excluding)
Php Php 7.2.0 (including) 7.2.18 (excluding)
Php Php 7.3.0 (including) 7.3.5 (excluding)
Red Hat Enterprise Linux 8 RedHat php:7.2-8020020191108065827.2c7ca891 *
Red Hat Software Collections for Red Hat Enterprise Linux 7 RedHat rh-php71-php-0:7.1.30-1.el7 *
Red Hat Software Collections for Red Hat Enterprise Linux 7 RedHat rh-php72-php-0:7.2.24-1.el7 *
Red Hat Software Collections for Red Hat Enterprise Linux 7.4 EUS RedHat rh-php71-php-0:7.1.30-1.el7 *
Red Hat Software Collections for Red Hat Enterprise Linux 7.5 EUS RedHat rh-php71-php-0:7.1.30-1.el7 *
Red Hat Software Collections for Red Hat Enterprise Linux 7.5 EUS RedHat rh-php72-php-0:7.2.24-1.el7 *
Red Hat Software Collections for Red Hat Enterprise Linux 7.6 EUS RedHat rh-php71-php-0:7.1.30-1.el7 *
Red Hat Software Collections for Red Hat Enterprise Linux 7.6 EUS RedHat rh-php72-php-0:7.2.24-1.el7 *
Red Hat Software Collections for Red Hat Enterprise Linux 7.7 EUS RedHat rh-php72-php-0:7.2.24-1.el7 *
Php5 Ubuntu trusty/esm *
Php7.0 Ubuntu xenial *
Php7.2 Ubuntu bionic *
Php7.2 Ubuntu cosmic *
Php7.2 Ubuntu devel *
Php7.2 Ubuntu disco *
Php7.2 Ubuntu upstream *
Php7.3 Ubuntu upstream *

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

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