OpenSMTPD up to 6.6.3 makemap.c Search Path untrusted search path

CVSS Meta Temp Score
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CTI Interest Score
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3.9$0-$5k0.00

Summaryinfo

A vulnerability was found in OpenSMTPD up to 6.6.3 and classified as problematic. This affects an unknown part of the file makemap.c. The manipulation as part of Search Path results in untrusted search path. This vulnerability is cataloged as CVE-2020-8793. The attack must be initiated from a local position. Furthermore, there is an exploit available. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability was found in OpenSMTPD up to 6.6.3. It has been classified as problematic. Affected is an unknown code of the file makemap.c. The manipulation as part of a Search Path leads to a untrusted search path vulnerability. CWE is classifying the issue as CWE-426. The product searches for critical resources using an externally-supplied search path that can point to resources that are not under the product's direct control. This is going to have an impact on confidentiality. CVE summarizes:

OpenSMTPD before 6.6.4 allows local users to read arbitrary files (e.g., on some Linux distributions) because of a combination of an untrusted search path in makemap.c and race conditions in the offline functionality in smtpd.c.

The weakness was shared 02/25/2020 (oss-sec). The advisory is shared for download at openwall.com. This vulnerability is traded as CVE-2020-8793 since 02/07/2020. The attack needs to be approached locally. A authentication is needed for exploitation. Technical details and a public exploit are known. The MITRE ATT&CK project declares the attack technique as T1574.

A public exploit has been developed by Qualys Corporation in C and been published before and not just after the advisory. The exploit is shared for download at exploit-db.com. It is declared as functional. The vulnerability was handled as a non-public zero-day exploit for at least 5 days. During that time the estimated underground price was around $0-$5k.

Upgrading to version 6.6.4 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at Exploit-DB (48139). The entry VDB-150505 is related to this item. VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

Name

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 4.0
VulDB Meta Temp Score: 3.9

VulDB Base Score: 3.3
VulDB Temp Score: 3.1
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 4.7
NVD Vector: 🔍

CVSSv2info

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

NVD Base Score: 🔍

Exploitinginfo

Class: Untrusted search path
CWE: CWE-426
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: No

Availability: 🔍
Access: Public
Status: Functional
Author: Qualys Corporation
Programming Language: 🔍
Download: 🔍

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Exploit-DB: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: OpenSMTPD 6.6.4

Timelineinfo

02/07/2020 🔍
02/20/2020 +13 days 🔍
02/25/2020 +5 days 🔍
02/26/2020 +1 days 🔍
08/30/2024 +1647 days 🔍

Sourcesinfo

Advisory: USN-4294-1
Status: Not defined

CVE: CVE-2020-8793 (🔍)
GCVE (CVE): GCVE-0-2020-8793
GCVE (VulDB): GCVE-100-150504
scip Labs: https://www.scip.ch/en/?labs.20161013
See also: 🔍

Entryinfo

Created: 02/26/2020 07:59
Updated: 08/30/2024 08:20
Changes: 02/26/2020 07:59 (39), 03/02/2020 14:36 (23), 03/02/2020 14:37 (1), 04/02/2024 21:45 (21), 08/30/2024 08:20 (3)
Complete: 🔍
Committer: misc
Cache ID: 216::103

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

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