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CVE-2023-42444

phonenumber panics on parsing crafted RF3966 inputs

HIGH
7.5
CVSS Score
Published: September 19, 2023 at 02:47 PM UTC
Updated: June 17, 2026 at 06:23 AM UTC
1 product affected across 1 vendorPhonenumber

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Severity
HIGH7.5
Exploit prediction
EPSS 0.9%
SSVC
No known exploit

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

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Phonenumber· Whisperfishcargo
95%
v < 0.2.5v < 0.2.5\+8.11.3v < 0.3.30.3.0\+8.12.9 ≤ v < 0.3.3\+8.13.9
Affected range stops below 0.2.5, so it looks safe — our inference, not a vendor statement
Affected range stops below 0.2.5+8.11.3, so it looks safe — our inference, not a vendor statement
Affected range stops below 0.3.3, so it looks safe — our inference, not a vendor statement
Affected range stops below 0.3.3+8.13.9, so it looks safe — our inference, not a vendor statement

References (3)

x_refsource_MISCPatch
Source: [email protected]
https://github.com/whisperfish/rust-phonenumber/commit/2dd44be94539c051b4dee55d1d9d349bd7bedde6
x_refsource_MISCPatch
Source: [email protected]
https://github.com/whisperfish/rust-phonenumber/commit/bea8e732b9cada617ede5cf51663dba183747f71
x_refsource_CONFIRMVendor Advisory
Source: [email protected]
https://github.com/whisperfish/rust-phonenumber/security/advisories/GHSA-whhr-7f2w-qqj2

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

7.5HIGH[email protected]
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-248CWE-392CWE-1284

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