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Please enable it to continue.


CVE-2024-9676

Public on

Last Modified: UTC

ModerateModerate ImpactWhat does this mean?
6.5CVSS v3 Score Breakdown


DESCRIPTION

A vulnerability was found in Podman, Buildah, and CRI-O. A symlink traversal
vulnerability in the containers/storage library can cause Podman, Buildah, and
CRI-O to hang and result in a denial of service via OOM kill when running a
malicious image using an automatically assigned user namespace (`--userns=auto`
in Podman and Buildah). The containers/storage library will read /etc/passwd
inside the container, but does not properly validate if that file is a symlink,
which can be used to cause the library to read an arbitrary file on the host.

A vulnerability was found in Podman, Buildah, and CRI-O. A symlink traversal
vulnerability in the containers/storage library can cause Podman, Buildah, and
CRI-O to hang and result in a denial of service via OOM kill when running a
malicious image using an automatically assigned user namespace (--userns=auto in
Podman and Buildah). The containers/storage library will read /etc/passwd inside
the container, but does not properly validate if that file is a symlink, which
can be used to cause the library to read an arbitrary file on the host.


MITIGATION

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.



ADDITIONAL INFORMATION

 * Bugzilla 2317467: Podman: Buildah: CRI-O: symlink traversal vulnerability in
   the containers/storage library can cause Denial of Service (DoS)
 * CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path
   Traversal')
 * FAQ: Frequently asked questions about CVE-2024-9676




EXTERNAL REFERENCES

 * https://www.cve.org/CVERecord?id=CVE-2024-9676

 * https://nvd.nist.gov/vuln/detail/CVE-2024-9676

 * https://github.com/advisories/GHSA-wq2p-5pc6-wpgf




COMMON VULNERABILITY SCORING SYSTEM (CVSS) SCORE DETAILS


IMPORTANT NOTE

CVSS scores for open source components depend on vendor-specific factors (e.g.
version or build chain). Therefore, Red Hat's score and impact rating can be
different from NVD and other vendors. Red Hat remains the authoritative CVE
Naming Authority (CNA) source for its products and services (see Red Hat
classifications).

The following CVSS metrics and score provided are preliminary and subject to
review.

CVSS v3 Score BreakdownRed HatNVD

CVSS v3 Base Score

6.5

N/A

Attack Vector

Network

N/A

Attack Complexity

Low

N/A

Privileges Required

Low

N/A

User Interaction

None

N/A

Scope

Unchanged

N/A

Confidentiality Impact

None

N/A

Integrity Impact

None

N/A

Availability Impact

High

N/A




CVSS V3 VECTOR

Red Hat: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H


ACKNOWLEDGEMENTS

Red Hat would like to thank Erik Sjölund <erik.sjolund@gmail.com> for reporting
this issue.


FREQUENTLY ASKED QUESTIONS


WHY IS RED HAT'S CVSS V3 SCORE OR IMPACT DIFFERENT FROM OTHER VENDORS?

For open source software shipped by multiple vendors, the CVSS base scores may
vary for each vendor's version depending on the version they ship, how they ship
it, the platform, and even how the software is compiled. This makes scoring of
vulnerabilities difficult for third-party vulnerability databases such as NVD
that only provide a single CVSS base score for each vulnerability. Red Hat
scores reflect how a vulnerability affects our products specifically.

For more information, see https://access.redhat.com/solutions/762393.


MY PRODUCT IS LISTED AS "UNDER INVESTIGATION" OR "AFFECTED", WHEN WILL RED HAT
RELEASE A FIX FOR THIS VULNERABILITY?

 * "Under investigation" doesn't necessarily mean that the product is affected
   by this vulnerability. It only means that our Analysis Team is still working
   on determining whether the product is affected and how it is affected.
 * "Affected" means that our Analysis Team has determined that this product is
   affected by this vulnerability and might release a fix to address this in the
   near future.


WHAT CAN I DO IF MY PRODUCT IS LISTED AS "WILL NOT FIX"?

A "will not fix" status means that a fix for an affected product version is not
planned or not possible due to complexity, which may create additional risk.

Available options depend mostly on the Impact of the vulnerability and the
current Life Cycle phase of your product. Overall, you have the following
options:
 * Upgrade to a supported product version that includes a fix for this
   vulnerability (recommended).
 * Apply a mitigation (if one exists).
 * Open a support case to request a prioritization of releasing a fix for this
   vulnerability.


WHAT CAN I DO IF MY PRODUCT IS LISTED AS "FIX DEFERRED"?

A deferred status means that a fix for an affected product version is not
guaranteed due to higher-priority development work.

Available options depend mostly on the Impact of the vulnerability and the
current Life Cycle phase of your product. Overall, you have the following
options:
 * Apply a mitigation (if one exists).
 * Open a support case to request a prioritization of releasing a fix for this
   vulnerability.
 * Red Hat Engineering focuses on addressing high-priority issues based on their
   complexity or limited lifecycle support. Therefore, lower-priority issues
   will not receive immediate fixes.


WHAT IS A MITIGATION?

A mitigation is an action that can be taken to reduce the impact of a security
vulnerability, without deploying any fixes.


I HAVE A RED HAT PRODUCT BUT IT IS NOT IN THE ABOVE LIST, IS IT AFFECTED?

The listed products were found to include one or more of the components that
this vulnerability affects. These products underwent a thorough evaluation to
determine their affectedness by this vulnerability. Note that layered products
(such as container-based offerings) that consume affected components from any of
the products listed in this table may be affected and are not represented.


WHY IS MY SECURITY SCANNER REPORTING MY PRODUCT AS VULNERABLE TO THIS
VULNERABILITY EVEN THOUGH MY PRODUCT VERSION IS FIXED OR NOT AFFECTED?

In order to maintain code stability and compatibility, Red Hat usually does not
rebase packages to entirely new versions. Instead, we backport fixes and new
features to an older version of the package we distribute. This can result in
some security scanners that only consider the package version to report the
package as vulnerable. To avoid this, we suggest that you use an approved
vulnerability scanner from our Red Hat Vulnerability Scanner Certification
program.

Not sure what something means? Check out our Security Glossary.

This page is generated automatically and has not been checked for errors or
omissions.

For clarification or corrections please contact Red Hat Product Security.

Last Modified: UTC

CVE description copyright © 2021


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