Описание
CRI-O vulnerable to /etc/passwd tampering resulting in Privilege Escalation
Impact
It is possible to craft an environment variable with newlines to add entries to a container's /etc/passwd. It is possible to circumvent admission validation of username/UID by adding such an entry.
Note: because the pod author is in control of the container's /etc/passwd, this is not considered a new risk factor. However, this advisory is being opened for transparency and as a way of tracking fixes.
Patches
1.26.0 will have the fix. More patches will be posted as they're available.
Workarounds
Additional security controls like SELinux should prevent any damage a container is able to do with root on the host. Using SELinux is recommended because this class of attack is already possible by manually editing the container's /etc/passwd
References
Ссылки
- https://github.com/cri-o/cri-o/security/advisories/GHSA-cm9x-c3rh-7rc4
- https://nvd.nist.gov/vuln/detail/CVE-2022-4318
- https://github.com/cri-o/cri-o/pull/6450
- https://access.redhat.com/errata/RHSA-2023:1033
- https://access.redhat.com/errata/RHSA-2023:1503
- https://access.redhat.com/security/cve/CVE-2022-4318
- https://bugzilla.redhat.com/show_bug.cgi?id=2152703
Пакеты
github.com/cri-o/cri-o
< 1.26.0
1.26.0
Связанные уязвимости
A vulnerability was found in cri-o. This issue allows the addition of arbitrary lines into /etc/passwd by use of a specially crafted environment variable.
A vulnerability was found in cri-o. This issue allows the addition of arbitrary lines into /etc/passwd by use of a specially crafted environment variable.
A vulnerability was found in cri-o. This issue allows the addition of arbitrary lines into /etc/passwd by use of a specially crafted environment variable.
A vulnerability was found in cri-o. This issue allows the addition of ...
