What’s Vulnerable › Vulnerabilities

CVE-2023-42444: phonenumber panics on parsing crafted RF3966 inputs

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.9% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2023-09-19 · updated 2026-06-17
• Weakness: CWE-248

Description

phonenumber is a library for parsing, formatting and validating international phone numbers. Prior to versions `0.3.3+8.13.9` and `0.2.5+8.11.3`, the phonenumber parsing code may panic due to a panic-guarded out-of-bounds access on the phonenumber string. In a typical deployment of `rust-phonenumber`, this may get triggered by feeding a maliciously crafted phonenumber over the network, specifically the string `.;phone-context=`. Versions `0.3.3+8.13.9` and `0.2.5+8.11.3` contain a patch for this issue. There are no known workarounds.

Affected products

• whisperfish rust-phonenumber: before 0.2.5\+8.11.3; from 0.3.0\+8.12.9 before 0.3.3\+8.13.9 — fixed in 0.2.5\+8.11.3, 0.3.3\+8.13.9

How to fix

Upgrade to a fixed version: whisperfish rust-phonenumber 0.2.5\+8.11.3, 0.3.3\+8.13.9. Check the vendor advisory for mitigations.

References

• https://github.com/whisperfish/rust-phonenumber/commit/2dd44be94539c051b4dee55d1d9d349bd7bedde6
• https://github.com/whisperfish/rust-phonenumber/commit/bea8e732b9cada617ede5cf51663dba183747f71
• https://github.com/whisperfish/rust-phonenumber/security/advisories/GHSA-whhr-7f2w-qqj2
• https://github.com/whisperfish/rust-phonenumber/commit/2dd44be94539c051b4dee55d1d9d349bd7bedde6
• https://github.com/whisperfish/rust-phonenumber/commit/bea8e732b9cada617ede5cf51663dba183747f71
• https://github.com/whisperfish/rust-phonenumber/security/advisories/GHSA-whhr-7f2w-qqj2

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