mtr up to 0.95 Environment Variable MTR_PACKET inclusion of functionality from untrusted control sphere

Summaryinfo

A vulnerability, which was classified as critical, has been found in mtr up to 0.95. This impacts an unknown function of the component Environment Variable Handler. This manipulation of the argument MTR_PACKET causes inclusion of functionality from untrusted control sphere. This vulnerability is tracked as CVE-2025-49809. The attack is restricted to local execution. No exploit exists. Applying a patch is the recommended action to fix this issue.

Detailsinfo

A vulnerability was found in mtr up to 0.95. It has been declared as critical. Affected by this vulnerability is an unknown functionality of the component Environment Variable Handler. The manipulation of the argument MTR_PACKET with an unknown input leads to a inclusion of functionality from untrusted control sphere vulnerability. The CWE definition for the vulnerability is CWE-829. The product imports, requires, or includes executable functionality (such as a library) from a source that is outside of the intended control sphere. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

mtr through 0.95, in certain privileged contexts, mishandles execution of a program specified by the MTR_PACKET environment variable. NOTE: mtr on macOS may often have Sudo rules, as an indirect consequence of Homebrew not installing setuid binaries.

The advisory is shared at github.com. This vulnerability is known as CVE-2025-49809 since 06/11/2025. The exploitation appears to be difficult. An attack has to be approached locally. Technical details are known, but no exploit is available.

The vulnerability scanner Nessus provides a plugin with the ID 243258 (Amazon Linux 2 : mtr (ALAS-2025-2937)), which helps to determine the existence of the flaw in a target environment.

Applying the patch 5226f105f087c29d3cfad9f28000e7536af91ac6 is able to eliminate this problem. The bugfix is ready for download at github.com.

The vulnerability is also documented in the databases at Tenable (243258) and EUVD (EUVD-2025-20020). If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

Name

• mtr

Version

• 0.1
• 0.2
• 0.3
• 0.4
• 0.5
• 0.6
• 0.7
• 0.8
• 0.9
• 0.10
• 0.11
• 0.12
• 0.13
• 0.14
• 0.15
• 0.16
• 0.17
• 0.18
• 0.19
• 0.20
• 0.21
• 0.22
• 0.23
• 0.24
• 0.25
• 0.26
• 0.27
• 0.28
• 0.29
• 0.30
• 0.31
• 0.32
• 0.33
• 0.34
• 0.35
• 0.36
• 0.37
• 0.38
• 0.39
• 0.40
• 0.41
• 0.42
• 0.43
• 0.44
• 0.45
• 0.46
• 0.47
• 0.48
• 0.49
• 0.50
• 0.51
• 0.52
• 0.53
• 0.54
• 0.55
• 0.56
• 0.57
• 0.58
• 0.59
• 0.60
• 0.61
• 0.62
• 0.63
• 0.64
• 0.65
• 0.66
• 0.67
• 0.68
• 0.69
• 0.70
• 0.71
• 0.72
• 0.73
• 0.74
• 0.75
• 0.76
• 0.77
• 0.78
• 0.79
• 0.80
• 0.81
• 0.82
• 0.83
• 0.84
• 0.85
• 0.86
• 0.87
• 0.88
• 0.89
• 0.90
• 0.91
• 0.92
• 0.93
• 0.94
• 0.95

License

• open-source

CPE 2.3info

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CPE 2.2info

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