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cvelistApacheCVELIST:CVE-2023-42503
HistorySep 14, 2023 - 7:45 a.m.

CVE-2023-42503 Apache Commons Compress: Denial of service via CPU consumption for malformed TAR file

2023-09-1407:45:14
CWE-400
CWE-20
apache
www.cve.org
10
apache commons compress
cpu consumption
malformed tar file
input validation
resource consumption vulnerability
denial of service
third party
file modification times
pax extended headers
bigdecimal class
jdk
algorithmic complexity
exhaustion of cpu resources
compressorstreamfactory
tararchiveinputstream
tarfile

AI Score

6.7

Confidence

High

EPSS

0.026

Percentile

90.6%

Improper Input Validation, Uncontrolled Resource Consumption vulnerability in Apache Commons Compress in TAR parsing.This issue affects Apache Commons Compress: from 1.22 before 1.24.0.

Users are recommended to upgrade to version 1.24.0, which fixes the issue.

A third party can create a malformed TAR file by manipulating file modification times headers, which when parsed with Apache Commons Compress, will cause a denial of service issue via CPU consumption.

In version 1.22 of Apache Commons Compress, support was added for file modification times with higher precision (issue # COMPRESS-612 1). The format for the PAX extended headers carrying this data consists of two numbers separated by a period 2, indicating seconds and subsecond precision (for example “1647221103.5998539”). The impacted fields are “atime”, “ctime”, “mtime” and “LIBARCHIVE.creationtime”. No input validation is performed prior to the parsing of header values.

Parsing of these numbers uses the BigDecimal 3 class from the JDK which has a publicly known algorithmic complexity issue when doing operations on large numbers, causing denial of service (see issue # JDK-6560193 4). A third party can manipulate file time headers in a TAR file by placing a number with a very long fraction (300,000 digits) or a number with exponent notation (such as “9e9999999”) within a file modification time header, and the parsing of files with these headers will take hours instead of seconds, leading to a denial of service via exhaustion of CPU resources. This issue is similar to CVE-2012-2098 5.

Only applications using CompressorStreamFactory class (with auto-detection of file types), TarArchiveInputStream and TarFile classes to parse TAR files are impacted. Since this code was introduced in v1.22, only that version and later versions are impacted.

CNA Affected

[
  {
    "collectionURL": "https://repo.maven.apache.org/maven2/",
    "defaultStatus": "unaffected",
    "packageName": "org.apache.commons:commons-compress",
    "product": "Apache Commons Compress",
    "vendor": "Apache Software Foundation",
    "versions": [
      {
        "lessThan": "1.24.0",
        "status": "affected",
        "version": "1.22",
        "versionType": "maven"
      }
    ]
  }
]