CVE-2024-29068 snapd non-regular file indefinite blocking read
An attacker can cause snapd to hang indefinitely by tricking a user into installing a malicious snap containing non-regular files, leading to denial of service.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Local or same network only
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2024-29068?
CVE-2024-29068 is a medium-severity denial of service vulnerability in Canonical snapd, published on 25 Jul 2024. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
Official description
In snapd versions prior to 2.62, snapd failed to properly check the file type when extracting a snap. The snap format is a squashfs file-system image and so can contain files that are non-regular files (such as pipes or sockets etc). Various file entries within the snap squashfs image (such as icons etc) are directly read by snapd when it is extracted. An attacker who could convince a user to install a malicious snap which contained non-regular files at these paths could then cause snapd to block indefinitely trying to read from such files and cause a denial of service.
Weakness: CWE-20
Which versions are affected by CVE-2024-29068?
3 open source packages ship an affected version, including github.com/snapcore/snapd. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
github.com/snapcore/snapd Go | All versions | None |
github.com/snapcore/snapd Go | All versions | 2.62 |
github.com/snapcore/snapd Go | All versions | 2.62 |
Products include Canonical Snapd.
How do I fix CVE-2024-29068?
Upgrade github.com/snapcore/snapd to 2.62 or later.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2024-29068 being exploited?
There is no known exploitation of CVE-2024-29068 in the wild and no public exploit code.
Other vulnerabilities in Canonical snapd
- CVE-2023-1523 Command injection in snapd
- CVE-2020-27352 Privilege escalation in snapd
- CVE-2019-7304 Local privilege escalation via snapd socket
- CVE-2021-4120 snapd could be made to bypass intended access restrictions through snap content interfaces and layout paths
- CVE-2024-5138 CVE-2024-5138: snapd snapctl auth bypass
Sources
Also known as DEBIAN-CVE-2024-29068, GHSA-64jh-cjwc-w8q6, GO-2024-3008, UBUNTU-CVE-2024-29068.