CVE-2022-41946 TemporaryFolder on unix-like systems does not limit access to created files in pgjdbc

2022-11-2300:00:00

CWE-377

CWE-200

GitHub_M

www.cve.org

pgjdbc

jdbc driver

exploit

unauthorized access

temporary files

unix-like systems

security vulnerability

4.7 Medium

CVSS3

Attack Vector

LOCAL

Attack Complexity

HIGH

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

NONE

Availability Impact

NONE

CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N

5.3 Medium

AI Score

Confidence

High

0.001 Low

EPSS

Percentile

23.7%

JSON

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.

CNA Affected

[
  {
    "vendor": "pgjdbc",
    "product": "pgjdbc",
    "versions": [
      {
        "version": ">= 42.2.0, < 42.2.27",
        "status": "affected"
      },
      {
        "version": "> 42.3.0, < 42.3.8",
        "status": "affected"
      },
      {
        "version": ">= 42.4.0, < 42.4.3",
        "status": "affected"
      },
      {
        "version": ">= 42.5.0, < 42.5.1",
        "status": "affected"
      }
    ]
  }
]