Описание
There is a defect in the CPython “tarfile” module affecting the “TarFile” extraction and entry enumeration APIs. The tar implementation would process tar archives with negative offsets without error, resulting in an infinite loop and deadlock during the parsing of maliciously crafted tar archives.
This vulnerability can be mitigated by including the following patch after importing the “tarfile” module: https://gist.github.com/sethmlarson/1716ac5b82b73dbcbf23ad2eff8b33e1
A flaw was found in the Python tarfile module. Processing a specially crafted tar archive, specifically an archive with negative offsets, can cause an infinite loop and deadlock. This issue results in a denial of service in the Python application using the tarfile module.
Отчет
To exploit this issue, an attacker needs to be able to process a specially crafted tar archive with a Python application using the tarfile module. Furthermore, this vulnerability will cause a denial of service with no other security impact. Within regulated environments, a combination of the following controls acts as a significant barrier to successfully exploiting a CWE-835: Loop with Unreachable Exit Condition ('Infinite Loop') vulnerability and therefore downgrades the severity of this particular CVE from Moderate to Low. The platform enforces hardening guidelines to ensure the most restrictive setting needed for operational requirements. Event logs are collected and processed for centralization, correlation, analysis, monitoring, reporting, alerting, and retention. This process ensures that audit logs are generated for specific events involving sensitive information, enabling capabilities like excessive CPU usage, long execution times, or processes consuming abnormal amounts of memory. Static code analysis and peer code review techniques are used to execute robust input validation and error-handling mechanisms to ensure all user inputs are thoroughly validated, preventing infinite loops caused by malformed or unexpected input, such as unbounded user input or unexpected null values that cause loops to never terminate. In the event of successful exploitation, process isolation limits the effect of an infinite loop to a single process rather than allowing it to consume all system resources.
Меры по смягчению последствий
This flaw can be mitigated by adding the following code after importing the tarfile module ("import tarfile"):
Затронутые пакеты
| Платформа | Пакет | Состояние | Рекомендация | Релиз |
|---|---|---|---|---|
| Red Hat Enterprise Linux 6 | python | Not affected | ||
| Red Hat Enterprise Linux 7 | python | Not affected | ||
| Red Hat Enterprise Linux 8 | python36:3.6/python36 | Affected | ||
| Red Hat Enterprise Linux AI (RHEL AI) | rhelai1/bootc-amd-rhel9 | Affected | ||
| Red Hat Enterprise Linux AI (RHEL AI) | rhelai1/bootc-aws-nvidia-rhel9 | Affected | ||
| Red Hat Enterprise Linux AI (RHEL AI) | rhelai1/bootc-azure-amd-rhel9 | Affected | ||
| Red Hat Enterprise Linux AI (RHEL AI) | rhelai1/bootc-azure-nvidia-rhel9 | Affected | ||
| Red Hat Enterprise Linux AI (RHEL AI) | rhelai1/bootc-gcp-nvidia-rhel9 | Affected | ||
| Red Hat Enterprise Linux AI (RHEL AI) | rhelai1/bootc-intel-rhel9 | Affected | ||
| Red Hat Enterprise Linux AI (RHEL AI) | rhelai1/bootc-nvidia-rhel9 | Affected |
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Дополнительная информация
Статус:
EPSS
7.5 High
CVSS3
Связанные уязвимости
There is a defect in the CPython “tarfile” module affecting the “TarFile” extraction and entry enumeration APIs. The tar implementation would process tar archives with negative offsets without error, resulting in an infinite loop and deadlock during the parsing of maliciously crafted tar archives. This vulnerability can be mitigated by including the following patch after importing the “tarfile” module: https://gist.github.com/sethmlarson/1716ac5b82b73dbcbf23ad2eff8b33e1
There is a defect in the CPython “tarfile” module affecting the “TarFile” extraction and entry enumeration APIs. The tar implementation would process tar archives with negative offsets without error, resulting in an infinite loop and deadlock during the parsing of maliciously crafted tar archives. This vulnerability can be mitigated by including the following patch after importing the “tarfile” module: https://gist.github.com/sethmlarson/1716ac5b82b73dbcbf23ad2eff8b33e1
There is a defect in the CPython \u201ctarfile\u201d module affecting ...
EPSS
7.5 High
CVSS3