Описание
Issue summary: During processing of a crafted CMS EnvelopedData message
with KeyTransportRecipientInfo a NULL pointer dereference can happen.
Impact summary: Applications that process attacker-controlled CMS data may
crash before authentication or cryptographic operations occur resulting in
Denial of Service.
When a CMS EnvelopedData message that uses KeyTransportRecipientInfo with
RSA-OAEP encryption is processed, the optional parameters field of
RSA-OAEP SourceFunc algorithm identifier is examined without checking
for its presence. This results in a NULL pointer dereference if the field
is missing.
Applications and services that call CMS_decrypt() on untrusted input
(e.g., S/MIME processing or CMS-based protocols) are vulnerable.
The FIPS modules in 3.6, 3.5, 3.4, 3.3 and 3.0 are not affected by this
issue, as the affected code is outside the OpenSSL FIPS module boundary.
A flaw was found in OpenSSL. A remote attacker could exploit this vulnerability by sending a specially crafted Cryptographic Message Syntax (CMS) EnvelopedData message. During the processing of a KeyTransportRecipientInfo with RSA-OAEP encryption, the system attempts to access an optional parameter field without first verifying its presence. This leads to a NULL pointer dereference, which can cause applications processing the attacker-controlled CMS data to crash, resulting in a Denial of Service (DoS).
Отчет
This CVE has been rated as moderate by redhat because the vulnerability is limited to a denial-of-service condition caused by a NULL pointer dereference in OpenSSL CMS processing, without evidence of memory corruption or code execution, furthermore the Affected functionality is niche. The vulnerable path requires: CMS/S/MIME processing, specifically CMS_decrypt(), with RSA-OAEP KeyTransportRecipientInfo. Many OpenSSL consumers never use CMS APIs, never process S/MIME, or do not decrypt attacker-controlled CMS objects. So exposure is far narrower than a generic TLS parsing vulnerability.
Меры по смягчению последствий
Applications that process Cryptographic Message Syntax (CMS) EnvelopedData messages should be configured to only accept input from trusted sources. Restricting network access to services that process untrusted CMS data can also reduce exposure to this Denial of Service vulnerability.
Затронутые пакеты
| Платформа | Пакет | Состояние | Рекомендация | Релиз |
|---|---|---|---|---|
| Confidential Cluster Operator | confidential-clusters-beta/confidential-cluster-operator-bundle | Affected | ||
| Confidential Cluster Operator | redhat-user-workloads/attestation-key-register | Affected | ||
| Confidential Cluster Operator | redhat-user-workloads/buildroot | Affected | ||
| Confidential Cluster Operator | redhat-user-workloads/compute-pcrs | Affected | ||
| Confidential Cluster Operator | redhat-user-workloads/confidential-cluster-operator | Affected | ||
| Confidential Cluster Operator | redhat-user-workloads/registration-server | Affected | ||
| Confidential Compute Attestation | openshift-sandboxed-containers/osc-operator-bundle | Affected | ||
| Confidential Compute Attestation | redhat-user-workloads/osc-monitor | Affected | ||
| Confidential Compute Attestation | redhat-user-workloads/osc-monitor-v1-10 | Not affected | ||
| Confidential Compute Attestation | redhat-user-workloads/osc-operator | Affected |
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Дополнительная информация
Статус:
EPSS
7.5 High
CVSS3
Связанные уязвимости
Issue summary: During processing of a crafted CMS EnvelopedData message with KeyTransportRecipientInfo a NULL pointer dereference can happen. Impact summary: Applications that process attacker-controlled CMS data may crash before authentication or cryptographic operations occur resulting in Denial of Service. When a CMS EnvelopedData message that uses KeyTransportRecipientInfo with RSA-OAEP encryption is processed, the optional parameters field of RSA-OAEP SourceFunc algorithm identifier is examined without checking for its presence. This results in a NULL pointer dereference if the field is missing. Applications and services that call CMS_decrypt() on untrusted input (e.g., S/MIME processing or CMS-based protocols) are vulnerable. The FIPS modules in 3.6, 3.5, 3.4, 3.3 and 3.0 are not affected by this issue, as the affected code is outside the OpenSSL FIPS module boundary. Impact summary: Applications that process attacker-controlled CMS data may crash before authentication or cryp...
Issue summary: During processing of a crafted CMS EnvelopedData message with KeyTransportRecipientInfo a NULL pointer dereference can happen. Impact summary: Applications that process attacker-controlled CMS data may crash before authentication or cryptographic operations occur resulting in Denial of Service. When a CMS EnvelopedData message that uses KeyTransportRecipientInfo with RSA-OAEP encryption is processed, the optional parameters field of RSA-OAEP SourceFunc algorithm identifier is examined without checking for its presence. This results in a NULL pointer dereference if the field is missing. Applications and services that call CMS_decrypt() on untrusted input (e.g., S/MIME processing or CMS-based protocols) are vulnerable. The FIPS modules in 3.6, 3.5, 3.4, 3.3 and 3.0 are not affected by this issue, as the affected code is outside the OpenSSL FIPS module boundary.
Possible NULL Dereference When Processing CMS KeyTransportRecipientInfo
Issue summary: During processing of a crafted CMS EnvelopedData messag ...
EPSS
7.5 High
CVSS3