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Medium

TemporaryFolder on unix-like systems does not limit access to created files

  • Disclosed: 23.11.2022
  • Updated: 11.10.2026 12:22

Vulnerability

PreparedStatement.setText(int, InputStream) and

PreparedStatemet.setBytea(int, InputStream)

will create a temporary file if the InputStream is larger than 51k

Example of vulnerable code:

java
String s = "some very large string greater than 51200 bytes";

PreparedStatement.setInputStream(1, new ByteArrayInputStream(s.getBytes()) );

This will create a temporary file which is readable by other users on Unix like systems, but not MacOS.

Impact 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.

When analyzing the impact of this vulnerability, here are the important questions to ask:

Is the driver running in an environment where the OS has other untrusted users. If yes, and you answered 'yes' to question 1, this vulnerability impacts you. If no, this vulnerability does not impact you. Patches 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 1.8 and higher users: this vulnerability is fixed in 42.2.27, 42.3.8, 42.4.3, 42.5.1 Java 1.7 users: this vulnerability is fixed in 42.2.27.jre7 Java 1.6 and lower users: no patch is available; you must use the workaround below. Workarounds 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 fix this vulnerability.

References CWE-200: Exposure of Sensitive Information to an Unauthorized Actor Fix commit https://github.com/pgjdbc/pgjdbc/commit/9008dc9aade6dbfe4efafcd6872ebc55f4699cf5 Similar Vulnerabilities Google Guava - https://github.com/google/guava/issues/4011 Apache Ant - https://nvd.nist.gov/vuln/detail/CVE-2020-1945 JetBrains Kotlin Compiler - https://nvd.nist.gov/vuln/detail/CVE-2020-15824

Affected software

Click a technology to see all vulnerabilities affecting it.

PlatformPackageVulnerable versionsFixed in
Java / Kotlin (Maven) org.postgresql:postgresql >= 42.2.0, < 42.2.27, >= 42.3.0, < 42.3.8, >= 42.4.0, < 42.4.3, >= 42.5.0, < 42.5.1 42.2.27, 42.3.8, 42.4.3, 42.5.1

References

CVSS score 4.7/10
CVSS vector
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N
Weakness (CWE)
CWE-200, CWE-668
Platform
Java / Kotlin (Maven)
Package
org.postgresql:postgresql
Disclosed
23.11.2022
Updated
11.10.2026 12:22

Sources and licenses

OSV / GitHub Advisory Database - GHSA-562r-vg33-8x8h - CC BY 4.0

Vulnerability history: org.postgresql:postgresql

All published vulnerabilities of this package (Java / Kotlin (Maven)), newest first. Shows whether this is a one-off slip or a package that needs watching.

All (10) in the archive
Total entries
10
First → latest
02.2022 07.2026
Without a fix
0
Exploited in attacks
0

Severity breakdown

  • Critical 1
  • High 7
  • Medium 2

Disclosures per year

Severity:
  1. PostgreSQL JDBC Driver: Silent channel-binding authentication downgrade via unsupported certificate algorithms
    High CVE-2026-54291 >= 42.7.4, < 42.7.12 42.7.12
  2. pgjdbc: Unbounded PBKDF2 iterations in SCRAM authentication allows CPU exhaustion DoS
    High · 7.5 CVE-2026-42198 >= 42.2.0, < 42.7.11 42.7.11
  3. pgjdbc Client Allows Fallback to Insecure Authentication Despite channelBinding=require Configuration
    High · 8.2 CVE-2025-49146 >= 42.7.4, < 42.7.7 42.7.7
  4. org.postgresql:postgresql vulnerable to SQL Injection via line comment generation
    Critical · 10.0 CVE-2024-1597 < 42.2.28, >= 42.3.0, < 42.3.9, >= 42.4.0, < 42.4.4, >= 42.5.0, < 42.5.5, >= 42.6.0, < 42.6.1, >= 42.7.0, < 42.7.2 42.2.28, 42.3.9, 42.4.4, 42.5.5, 42.6.1, 42.7.2
  5. TemporaryFolder on unix-like systems does not limit access to created files this entry
    Medium · 4.7 CVE-2022-41946 >= 42.2.0, < 42.2.27, >= 42.3.0, < 42.3.8, >= 42.4.0, < 42.4.3, >= 42.5.0, < 42.5.1 42.2.27, 42.3.8, 42.4.3, 42.5.1
  6. PostgreSQL JDBC Driver SQL Injection in ResultSet.refreshRow() with malicious column names
    High · 7.1 CVE-2022-31197 < 42.2.26, >= 42.4.0, < 42.4.1, >= 42.3.0, < 42.3.7 42.2.26, 42.4.1, 42.3.7
  7. Unescaped parameters in the PostgreSQL JDBC driver
    High CVE-2012-1618 < 8.2 8.2
  8. Improper Restriction of XML External Entity Reference
    High · 7.7 CVE-2020-13692 >= 9.4.1212.jre6, < 42.2.13 42.2.13
  9. pgjdbc Does Not Check Class Instantiation when providing Plugin Classes
    High · 7.0 CVE-2022-21724 >= 9.4.1208, < 42.2.25, >= 42.3.0, < 42.3.2 42.2.25, 42.3.2

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