Canonical snapd up to 2.61 Symbolic Links external reference

Summaryinfo

A vulnerability has been found in Canonical snapd up to 2.61 and classified as problematic. This impacts an unknown function of the component Symbolic Links Handler. Performing a manipulation results in external reference. This vulnerability is reported as CVE-2024-29069. The attack requires a local approach. No exploit exists. The affected component should be upgraded.

Detailsinfo

A vulnerability classified as problematic has been found in Canonical snapd up to 2.61. This affects an unknown part of the component Symbolic Links Handler. The manipulation with an unknown input leads to a external reference vulnerability. CWE is classifying the issue as CWE-610. The product uses an externally controlled name or reference that resolves to a resource that is outside of the intended control sphere. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

In snapd versions prior to 2.62, snapd failed to properly check the destination of symbolic links when extracting a snap. The snap format is a squashfs file-system image and so can contain symbolic links and other file types. Various file entries within the snap squashfs image (such as icons and desktop files etc) are directly read by snapd when it is extracted. An attacker who could convince a user to install a malicious snap which contained symbolic links at these paths could then cause snapd to write out the contents of the symbolic link destination into a world-readable directory. This in-turn could allow an unprivileged user to gain access to privileged information.

The weakness was disclosed by Zeyad Gouda. The advisory is shared at github.com. This vulnerability is uniquely identified as CVE-2024-29069 since 03/15/2024. The exploitability is told to be easy. An attack has to be approached locally. It demands that the victim is doing some kind of user interaction. Neither technical details nor an exploit are publicly available.

The vulnerability scanner Nessus provides a plugin with the ID 239945 (TencentOS Server 4: snapd (TSSA-2025:0174)), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 2.62 eliminates this vulnerability. Applying a patch is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

The vulnerability is also documented in the vulnerability database at Tenable (239945). Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Vendor

• Canonical

Name

• snapd

Version

• 2.0
• 2.1
• 2.2
• 2.3
• 2.4
• 2.5
• 2.6
• 2.7
• 2.8
• 2.9
• 2.10
• 2.11
• 2.12
• 2.13
• 2.14
• 2.15
• 2.16
• 2.17
• 2.18
• 2.19
• 2.20
• 2.21
• 2.22
• 2.23
• 2.24
• 2.25
• 2.26
• 2.27
• 2.28
• 2.29
• 2.30
• 2.31
• 2.32
• 2.33
• 2.34
• 2.35
• 2.36
• 2.37
• 2.38
• 2.39
• 2.40
• 2.41
• 2.42
• 2.43
• 2.44
• 2.45
• 2.46
• 2.47
• 2.48
• 2.49
• 2.50
• 2.51
• 2.52
• 2.53
• 2.54
• 2.55
• 2.56
• 2.57
• 2.58
• 2.59
• 2.60
• 2.61

License

• open-source

CPE 2.3info

• 🔍
• 🔍
• 🔍

CPE 2.2info

• 🔍
• 🔍
• 🔍

CVSSv4info

CVSSv3info

CVSSv2info

Exploitinginfo

Threat Intelligenceinfo

Countermeasuresinfo

Timelineinfo

Sourcesinfo

Entryinfo

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Discussion