Exim up to 4.92 os command injection

CVSS Meta Temp Score
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CTI Interest Score
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8.6$0-$5k0.00

Summaryinfo

A vulnerability was found in Exim up to 4.92. It has been declared as critical. Impacted is an unknown function. Such manipulation leads to input validation. This vulnerability is uniquely identified as CVE-2019-10149. The attack can be launched remotely. Moreover, an exploit is present. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability was found in Exim up to 4.92 (Mail Server Software) and classified as critical. Affected by this issue is some unknown processing. The manipulation with an unknown input leads to a input validation vulnerability. Using CWE to declare the problem leads to CWE-78. The product constructs all or part of an OS command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended OS command when it is sent to a downstream component. Impacted is confidentiality, integrity, and availability.

The weakness was disclosed 06/03/2019 as CVE-2019-10149 Exim 4.87 to 4.91 as confirmed security advisory (Website). The advisory is shared for download at exim.org. The public release has been coordinated in cooperation with the vendor. This vulnerability is handled as CVE-2019-10149. The attack may be launched remotely. No form of authentication is required for exploitation. Technical details are unknown but a public exploit is available. The MITRE ATT&CK project declares the attack technique as T1202. The advisory points out:

We received a report of a possible remote exploit. Currently there is no evidence of an active use of this exploit.

A public exploit has been developed by Dennis Herrmann/Marco Ivaldi/Guillaume André in Ruby/Metasploit and been published 3 months after the advisory. The exploit is available at exploit-db.com. It is declared as attacked. As 0-day the estimated underground price was around $5k-$25k. The commercial vulnerability scanner Qualys is able to test this issue with plugin 172448 (OpenSUSE Security Update for Security update exim (openSUSE-SU-2019:1524-1)). The advisory illustrates:

The severity depends on your configuration. It depends on how close to the standard configuration your Exim runtime configuration is. The closer the better.
This issue was added on 01/10/2022 to the CISA Known Exploited Vulnerabilities Catalog with a due date of 07/10/2022:
Apply updates per vendor instructions.

Upgrading to version 4.92 eliminates this vulnerability. A possible mitigation has been published even before and not after the disclosure of the vulnerability. The security advisory contains the following remark:

A patch exists already, is being tested, and backported to all versions we released since (and including) 4.87.

The vulnerability is also documented in the vulnerability database at Exploit-DB (47307). Once again VulDB remains the best source for vulnerability data.

Productinfo

Type

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 8.7
VulDB Meta Temp Score: 8.6

VulDB Base Score: 7.3
VulDB Temp Score: 7.0
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 9.8
NVD Vector: 🔍

CNA Base Score: 9.0
CNA Vector (Red Hat, Inc.): 🔍

CVSSv2info

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

NVD Base Score: 🔍

Exploitinginfo

Class: Os command injection
CWE: CWE-78 / CWE-77 / CWE-74
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Access: Public
Status: Attacked
Author: Dennis Herrmann/Marco Ivaldi/Guillaume André
Programming Language: 🔍
Download: 🔍

EPSS Score: 🔍
EPSS Percentile: 🔍

KEV Added: 🔍
KEV Due: 🔍
KEV Remediation: 🔍
KEV Ransomware: 🔍
KEV Notice: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Qualys ID: 🔍
Qualys Name: 🔍

Exploit-DB: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

Reaction Time: 🔍
0-Day Time: 🔍
Exploit Delay Time: 🔍

Upgrade: Exim 4.92

Timelineinfo

03/27/2019 🔍
05/27/2019 +61 days 🔍
05/27/2019 +0 days 🔍
06/03/2019 +7 days 🔍
06/04/2019 +1 days 🔍
08/26/2019 +83 days 🔍
04/01/2025 +2045 days 🔍

Sourcesinfo

Advisory: CVE-2019-10149 Exim 4.87 to 4.91
Status: Confirmed
Coordinated: 🔍

CVE: CVE-2019-10149 (🔍)
GCVE (CVE): GCVE-0-2019-10149
GCVE (VulDB): GCVE-100-135932
SecurityFocus: 108679

scip Labs: https://www.scip.ch/en/?labs.20161013

Entryinfo

Created: 06/04/2019 13:46
Updated: 04/01/2025 23:04
Changes: 06/04/2019 13:46 (45), 01/05/2020 13:29 (1), 01/05/2020 13:30 (21), 01/05/2020 13:31 (3), 09/26/2023 22:56 (9), 09/26/2023 23:09 (12), 04/22/2024 13:30 (27), 09/09/2024 22:29 (1), 04/01/2025 23:04 (6)
Complete: 🔍
Committer: misc
Cache ID: 216::103

Once again VulDB remains the best source for vulnerability data.

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