pgjdbc 4.5+ Temp File Info Disclosure via setText/setBytea
CVE-2022-41946 Published on November 23, 2022
TemporaryFolder on unix-like systems does not limit access to created files in pgjdbc
pgjdbc is an open source postgresql JDBC Driver. In affected versions a prepared statement using either `PreparedStatement.setText(int, InputStream)` or `PreparedStatemet.setBytea(int, InputStream)` will create a temporary file if the InputStream is larger than 2k. This will create a temporary file which is readable by other users on Unix like systems, but not MacOS. On Unix like systems, the system's temporary directory is shared between all users on that system. Because of this, when files and directories are written into this directory they are, by default, readable by other users on that same system. This vulnerability does not allow other users to overwrite the contents of these directories or files. This is purely an information disclosure vulnerability. Because certain JDK file system APIs were only added in JDK 1.7, this this fix is dependent upon the version of the JDK you are using. Java 1.7 and higher users: this vulnerability is fixed in 4.5.0. Java 1.6 and lower users: no patch is available. If you are unable to patch, or are stuck running on Java 1.6, specifying the java.io.tmpdir system environment variable to a directory that is exclusively owned by the executing user will mitigate this vulnerability.
Vulnerability Analysis
CVE-2022-41946 is exploitable with local system access, and requires small amount of user privileges. This vulnerability is consided to have a high level of attack complexity. The potential impact of an exploit of this vulnerability is considered to have a high impact on confidentiality, with no impact on integrity and availability.
Weakness Types
What is an Information Disclosure Vulnerability?
The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information.
CVE-2022-41946 has been classified to as an Information Disclosure vulnerability or weakness.
Insecure Temporary File
Creating and using insecure temporary files can leave application and system data vulnerable to attack.
Products Associated with CVE-2022-41946
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Affected Versions
pgjdbc:- Version >= 42.2.0, < 42.2.27 is affected.
- Version > 42.3.0, < 42.3.8 is affected.
- Version >= 42.4.0, < 42.4.3 is affected.
- Version >= 42.5.0, < 42.5.1 is affected.
Vulnerable Packages
The following package name and versions may be associated with CVE-2022-41946
| Package Manager | Vulnerable Package | Versions | Fixed In |
|---|---|---|---|
| maven | org.postgresql:postgresql | >= 42.5.0, < 42.5.1 | 42.5.1 |
| maven | org.postgresql:postgresql | >= 42.4.0, < 42.4.3 | 42.4.3 |
| maven | org.postgresql:postgresql | > 42.3.0, < 42.3.8 | 42.3.8 |
| maven | org.postgresql:postgresql | >= 42.2.0, < 42.2.27 | 42.2.27 |
Exploit Probability
EPSS (Exploit Prediction Scoring System) scores estimate the probability that a vulnerability will be exploited in the wild within the next 30 days. The percentile shows you how this score compares to all other vulnerabilities.