CVE-2021-38371 : The STARTTLS feature in Exim through 4.94.2 allows response injection (buffering

The STARTTLS feature in Exim through 4.94.2 allows response injection (buffering) during MTA SMTP sending.

Published 2021-08-10 15:15:08

Updated 2021-08-20 17:32:31

Source MITRE

View at NVD, CVE.org

Products affected by CVE-2021-38371

Exim » Exim
Versions up to, including, (<=) 4.94.2
cpe:2.3:a:exim:exim:*:*:*:*:*:*:*:*
Matching versions

Top countries where our scanners detected CVE-2021-38371

Top open port discovered on systems with this issue 80

IPs affected by CVE-2021-38371 217,505

Threat actors abusing to this issue? Yes

Find out if you^* are affected by CVE-2021-38371!

^*Directly or indirectly through your vendors, service providers and 3rd parties. Powered by attack surface intelligence from SecurityScorecard.

EPSS FAQ

0.14%

Probability of exploitation activity in the next 30 days EPSS Score History

~ 49 %

Percentile, the proportion of vulnerabilities that are scored at or less

Base Score	Base Severity	CVSS Vector	Exploitability Score	Impact Score	Score Source
5.0	MEDIUM	AV:N/AC:L/Au:N/C:N/I:P/A:N	10.0	2.9	NIST
Access Vector: Network Access Complexity: Low Authentication: None Confidentiality Impact: None Integrity Impact: Partial Availability Impact: None
7.5	HIGH	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N	3.9	3.6	NIST
Attack Vector: Network Attack Complexity: Low Privileges Required: None User Interaction: None Scope: Unchanged Confidentiality: None Integrity: High Availability: None

CWE-74 Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')

The product constructs all or part of a command, data structure, or record using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify how it is parsed or interpreted when it is sent to a downstream component.

Assigned by: nvd@nist.gov (Primary)

Jump to