Описание
An unbounded recursion flaw has been discovered in the pypi pyasn1 library. This uncontrolled recursion occurs when decoding ASN.1 data with deeply nested structures. An attacker can supply a crafted payload containing nested SEQUENCE (0x30) or SET (0x31) tags with Indefinite Length (0x80) markers. This forces the decoder to recursively call itself until the Python interpreter crashes with a RecursionError or consumes all available memory (OOM), crashing the host application.
Меры по смягчению последствий
Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.
Затронутые пакеты
| Платформа | Пакет | Состояние | Рекомендация | Релиз |
|---|---|---|---|---|
| Migration Toolkit for Containers | rhmtc/openshift-migration-hook-runner-rhel8 | Affected | ||
| Migration Toolkit for Containers | rhmtc/openshift-migration-rhel8-operator | Affected | ||
| Migration Toolkit for Virtualization | migration-toolkit-virtualization/mtv-rhel9-operator | Affected | ||
| Migration Toolkit for Virtualization | mtv-candidate/mtv-rhel9-operator | Affected | ||
| OpenShift Lightspeed | openshift-lightspeed/lightspeed-service-api-rhel9 | Affected | ||
| OpenShift Lightspeed | openshift-lightspeed/lightspeed-to-dataverse-exporter-rhel9 | Affected | ||
| OpenShift Service Mesh 3 | openshift-service-mesh/kiali-rhel9-operator | Affected | ||
| Red Hat AI Inference Server | rhaiis/vllm-rocm-rhel9 | Affected | ||
| Red Hat AI Inference Server | rhaiis/vllm-tpu-rhel9 | Affected | ||
| Red Hat Ansible Automation Platform 2 | ansible-automation-platform-24/ee-minimal-rhel8 | Affected |
Показывать по
Дополнительная информация
Статус:
EPSS
7.5 High
CVSS3
Связанные уязвимости
(pyasn1 is a generic ASN.1 library for Python. Prior to 0.6.3, the `pya ...)
pyasn1 is a generic ASN.1 library for Python. Prior to 0.6.3, the `pyasn1` library is vulnerable to a Denial of Service (DoS) attack caused by uncontrolled recursion when decoding ASN.1 data with deeply nested structures. An attacker can supply a crafted payload containing thousands of nested `SEQUENCE` (`0x30`) or `SET` (`0x31`) tags with "Indefinite Length" (`0x80`) markers. This forces the decoder to recursively call itself until the Python interpreter crashes with a `RecursionError` or consumes all available memory (OOM), crashing the host application. This is a distinct vulnerability from CVE-2026-23490 (which addressed integer overflows in OID decoding). The fix for CVE-2026-23490 (`MAX_OID_ARC_CONTINUATION_OCTETS`) does not mitigate this recursion issue. Version 0.6.3 fixes this specific issue.
pyasn1 is a generic ASN.1 library for Python. Prior to 0.6.3, the `pya ...
EPSS
7.5 High
CVSS3