Python up to 2.7.18/3.11 E-mail improper validation of syntactic correctness of input

CVSS Meta Temp Score
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CTI Interest Score
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6.1$0-$5k0.00

Summaryinfo

A vulnerability described as critical has been identified in Python up to 2.7.18/3.11. Impacted is an unknown function of the component E-mail Module. The manipulation results in improper validation of syntactic correctness of input. This vulnerability is known as CVE-2023-27043. It is possible to launch the attack remotely. Furthermore, an exploit is available.

Detailsinfo

A vulnerability was found in Python up to 2.7.18/3.11 (Programming Language Software). It has been classified as critical. Affected is an unknown code block of the component E-mail Module. The manipulation with an unknown input leads to a improper validation of syntactic correctness of input vulnerability. CWE is classifying the issue as CWE-1286. The product receives input that is expected to be well-formed - i.e., to comply with a certain syntax - but it does not validate or incorrectly validates that the input complies with the syntax. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

The email module of Python through 3.11.3 incorrectly parses e-mail addresses that contain a special character. The wrong portion of an RFC2822 header is identified as the value of the addr-spec. In some applications, an attacker can bypass a protection mechanism in which application access is granted only after verifying receipt of e-mail to a specific domain (e.g., only @company.example.com addresses may be used for signup). This occurs in email/_parseaddr.py in recent versions of Python.

The weakness was published 04/19/2023 as 102988. The advisory is available at github.com. This vulnerability is traded as CVE-2023-27043 since 02/27/2023. Technical details are unknown but a public exploit is available.

The exploit is shared for download at github.com. It is declared as proof-of-concept. The vulnerability scanner Nessus provides a plugin with the ID 207976 (Ubuntu 16.04 LTS / 18.04 LTS / 20.04 LTS / 22.04 LTS : Python vulnerability (USN-7015-3)), which helps to determine the existence of the flaw in a target environment.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the vulnerability database at Tenable (207976). If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

Type

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.3
VulDB Meta Temp Score: 6.1

VulDB Base Score: 7.3
VulDB Temp Score: 6.9
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 5.3
NVD Vector: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

Exploitinginfo

Class: Improper validation of syntactic correctness of input
CWE: CWE-1286 / CWE-20
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Access: Public
Status: Proof-of-Concept
Download: 🔍

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 207976
Nessus Name: Ubuntu 16.04 LTS / 18.04 LTS / 20.04 LTS / 22.04 LTS : Python vulnerability (USN-7015-3)

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍

Timelineinfo

02/27/2023 🔍
04/19/2023 +50 days 🔍
04/19/2023 +0 days 🔍
12/18/2025 +973 days 🔍

Sourcesinfo

Advisory: 102988
Status: Confirmed

CVE: CVE-2023-27043 (🔍)
GCVE (CVE): GCVE-0-2023-27043
GCVE (VulDB): GCVE-100-226770
scip Labs: https://www.scip.ch/en/?labs.20161013

Entryinfo

Created: 04/19/2023 06:54
Updated: 12/18/2025 00:23
Changes: 04/19/2023 06:54 (42), 05/13/2023 15:15 (11), 10/02/2024 07:13 (16), 12/18/2025 00:23 (1)
Complete: 🔍
Cache ID: 216::103

If you want to get best quality of vulnerability data, you may have to visit VulDB.

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