Exim DMARC dmarc.c dmarc_dns_lookup use after free

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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6.9$0-$5k0.08

A vulnerability was found in Exim (Mail Server Software) (unknown version) and classified as problematic. This issue affects the function dmarc_dns_lookup of the file dmarc.c of the component DMARC Handler. The manipulation with an unknown input leads to a use after free vulnerability. Using CWE to declare the problem leads to CWE-416. Referencing memory after it has been freed can cause a program to crash, use unexpected values, or execute code. Impacted is confidentiality, integrity, and availability.

The weakness was shared 10/20/2022 as 12fb3842f81bcbd4a4519d5728f2d7e0e3ca1445. It is possible to read the advisory at git.exim.org. The identification of this vulnerability is CVE-2022-3620. Technical details of the vulnerability are known, but there is no available exploit.

Applying the patch 12fb3842f81bcbd4a4519d5728f2d7e0e3ca1445 is able to eliminate this problem. The bugfix is ready for download at git.exim.org.

Productinfo

Type

Name

License

  • open-source

CPE 2.3info

CPE 2.2info

CVSSv3info

VulDB Meta Base Score: 7.0
VulDB Meta Temp Score: 6.9

VulDB Base Score: 5.6
VulDB Temp Score: 5.4
VulDB Vector: 🔒
VulDB Reliability: 🔍

NVD Base Score: 9.8
NVD Vector: 🔒

CNA Base Score: 5.6
CNA Vector (VulDB): 🔒

CVSSv2info

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

Exploitinginfo

Class: Use after free
CWE: CWE-416 / CWE-119
ATT&CK: Unknown

Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Patch
Status: 🔍

0-Day Time: 🔒

Patch: 12fb3842f81bcbd4a4519d5728f2d7e0e3ca1445

Timelineinfo

10/20/2022 Advisory disclosed
10/20/2022 +0 days CVE reserved
10/20/2022 +0 days VulDB entry created
11/18/2022 +29 days VulDB last update

Sourcesinfo

Advisory: 12fb3842f81bcbd4a4519d5728f2d7e0e3ca1445
Status: Confirmed

CVE: CVE-2022-3620 (🔒)

Entryinfo

Created: 10/20/2022 09:53 PM
Updated: 11/18/2022 06:54 PM
Changes: 10/20/2022 09:53 PM (42), 11/18/2022 06:47 PM (2), 11/18/2022 06:54 PM (21)
Complete: 🔍

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