VDB-248944 · CVE-2023-51765 · GCVE-0-2023-51765

Sendmail up to 8.14.7 E-Mail Message protection mechanism

CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
4.7	$0-$5k	0.00

Summaryinfo

A vulnerability labeled as critical has been found in Sendmail up to 8.14.7. This vulnerability affects unknown code of the component E-Mail Message Handler. Executing a manipulation can lead to protection mechanism. The identification of this vulnerability is CVE-2023-51765. The attack may be launched remotely. There is no exploit available. Applying a patch is advised to resolve this issue.

Detailsinfo

A vulnerability has been found in Sendmail up to 8.14.7 (Mail Server Software) and classified as critical. This vulnerability affects an unknown part of the component E-Mail Message Handler. The manipulation with an unknown input leads to a protection mechanism vulnerability. The CWE definition for the vulnerability is CWE-693. The product does not use or incorrectly uses a protection mechanism that provides sufficient defense against directed attacks against the product. As an impact it is known to affect integrity. CVE summarizes:

sendmail through at least 8.14.7 allows SMTP smuggling in certain configurations. Remote attackers can use a published exploitation technique to inject e-mail messages that appear to originate from the sendmail server, allowing bypass of an SPF protection mechanism. This occurs because sendmail supports . but some other popular e-mail servers do not.

The weakness was shared 12/24/2023. The advisory is shared for download at sec-consult.com. This vulnerability was named CVE-2023-51765 since 12/24/2023. There are neither technical details nor an exploit publicly available.

Applying the patch 5dd76dd0cc19450133aa379ce0ce4a68ae07fb39 is able to eliminate this problem. The bugfix is ready for download at github.com.

VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

Type

Mail Server Software

Name

Sendmail

Version

License

open-source

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 4.8
VulDB Meta Temp Score: 4.7

VulDB Base Score: 4.3
VulDB Temp Score: 4.1
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 5.3
NVD Vector: 🔍

CVSSv2info

AV	AC	Au	C	I	A
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💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳

Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

Exploitinginfo

Class: Protection mechanism
CWE: CWE-693
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Patch
Status: 🔍

0-Day Time: 🔍

Patch: 5dd76dd0cc19450133aa379ce0ce4a68ae07fb39

Timelineinfo

12/24/2023 🔍
12/24/2023 +0 days 🔍
12/24/2023 +0 days 🔍
06/15/2024 +174 days 🔍

Sourcesinfo

Advisory: 5dd76dd0cc19450133aa379ce0ce4a68ae07fb39
Status: Confirmed

CVE: CVE-2023-51765 (🔍)
GCVE (CVE): GCVE-0-2023-51765
GCVE (VulDB): GCVE-100-248944

Entryinfo

Created: 12/24/2023 09:37
Updated: 06/15/2024 13:25
Changes: 12/24/2023 09:37 (41), 01/18/2024 16:32 (1), 01/18/2024 16:39 (11), 06/15/2024 13:25 (15)
Complete: 🔍
Cache ID: 216::103