Vulnerabilities
Misconfiguration
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CVE Vulnerabilities

CVE-2018-19274

Deserialization of Untrusted Data

Published: Nov 17, 2018 | Modified: Nov 21, 2024
CVSS 3.x
7.2
HIGH
Source:
NVD
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
CVSS 2.x
6.5 MEDIUM
AV:N/AC:L/Au:S/C:P/I:P/A:P
RedHat/V2
RedHat/V3
Ubuntu
MEDIUM
Vulnerability-free packages from our partners
Additional information
NVDhttps://nvd.nist.gov/vuln/detail/CVE-2018-19274
CWEhttps://cwe.mitre.org/data/definitions/502.html

Passing an absolute path to a file_exists check in phpBB before 3.2.4 allows Remote Code Execution through Object Injection by employing Phar deserialization when an attacker has access to the Admin Control Panel with founder permissions.

Weakness

The product deserializes untrusted data without sufficiently ensuring that the resulting data will be valid.

Affected Software

Name Vendor Start Version End Version
Phpbb Phpbb * 3.2.4 (excluding)
Phpbb3 Ubuntu esm-apps/xenial *
Phpbb3 Ubuntu esm-infra-legacy/trusty *
Phpbb3 Ubuntu trusty *
Phpbb3 Ubuntu trusty/esm *
Phpbb3 Ubuntu upstream *
Phpbb3 Ubuntu xenial *

Potential Mitigations

  • Make fields transient to protect them from deserialization.
  • An attempt to serialize and then deserialize a class containing transient fields will result in NULLs where the transient data should be. This is an excellent way to prevent time, environment-based, or sensitive variables from being carried over and used improperly.

References

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