Описание
libxml2 is vulnerable to multiple stack-based buffer overflows in the xmlcatalog utility when running in --shell mode. The usershell() function processes user input using fixed-size stack buffers without proper bounds checking.
By supplying an overly long input line, an attacker can overflow internal buffers (command, arg, and argv) during input parsing. This results in memory corruption within the stack frame.
Successful exploitation may cause a crash or potentially allow arbitrary code execution in the context of the xmlcatalog process.
This issue has been fixed in the commit c2e233fc.
NOTE:
The maintainers of this project did not agree that this issue is a vulnerability and considered it a bug.
A flaw was found in libxml2, specifically within the xmlcatalog utility when operating in shell mode. An attacker can exploit multiple stack-based buffer overflows by providing an excessively long input line. This leads to memory corruption, which may cause the application to crash or potentially allow the attacker to execute arbitrary code within the context of the xmlcatalog process.
Отчет
This Moderate impact flaw in libxml2 affects the xmlcatalog utility when operating in --shell mode. Exploitation requires an attacker to provide specially crafted, excessively long input, leading to stack-based buffer overflows. This vulnerability is limited to scenarios where an attacker can control input to the xmlcatalog utility, reducing its overall exposure in typical Red Hat deployments.
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 |
|---|---|---|---|---|
| Red Hat Enterprise Linux 6 | libxml2 | Fix deferred | ||
| Red Hat Enterprise Linux 7 | libxml2 | Fix deferred | ||
| Red Hat Enterprise Linux 8 | podman | Fix deferred | ||
| Red Hat OpenShift AI (RHOAI) | rhoai/odh-llama-stack-k8s-operator-rhel9 | Not affected | ||
| Red Hat OpenShift Container Platform 4 | openshift/ose-rhel-coreos-8 | Fix deferred | ||
| Red Hat OpenShift Container Platform 4 | openshift/ose-rhel-coreos-9 | Fix deferred | ||
| Red Hat OpenShift Container Platform 5 | openshift/ose-rhel-coreos-9 | Fix deferred | ||
| Red Hat Enterprise Linux 10 | libxml2 | Fixed | RHSA-2026:60394 | 27.08.2026 |
| Red Hat Enterprise Linux 10.0 Extended Update Support | libxml2 | Fixed | RHSA-2026:89759 | 26.10.2026 |
| Red Hat Enterprise Linux 8 | libxml2 | Fixed | RHSA-2026:61248 | 31.08.2026 |
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Дополнительная информация
Статус:
EPSS
5.9 Medium
CVSS3
Связанные уязвимости
libxml2 is vulnerable to multiple stack-based buffer overflows in the xmlcatalog utility when running in --shell mode. The usershell() function processes user input using fixed-size stack buffers without proper bounds checking. By supplying an overly long input line, an attacker can overflow internal buffers (command, arg, and argv) during input parsing. This results in memory corruption within the stack frame. Successful exploitation may cause a crash or potentially allow arbitrary code execution in the context of the xmlcatalog process. This issue has been fixed in the commit c2e233fc. NOTE: The maintainers of this project did not agree that this issue is a vulnerability and considered it a bug.
libxml2 is vulnerable to multiple stack-based buffer overflows in the xmlcatalog utility when running in --shell mode. The usershell() function processes user input using fixed-size stack buffers without proper bounds checking. By supplying an overly long input line, an attacker can overflow internal buffers (command, arg, and argv) during input parsing. This results in memory corruption within the stack frame. Successful exploitation may cause a crash or potentially allow arbitrary code execution in the context of the xmlcatalog process. This issue has been fixed in the commit c2e233fc. NOTE: The maintainers of this project did not agree that this issue is a vulnerability and considered it a bug.
libxml2 is vulnerable to multiple stack-based buffer overflows in the ...
EPSS
5.9 Medium
CVSS3