Exim up to 4.92.1 Backslash memory corruption

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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9.6$0-$5k0.00

Summaryinfo

A vulnerability marked as critical has been reported in Exim up to 4.92.1. Affected is an unknown function. Performing a manipulation as part of Backslash results in memory corruption. This vulnerability is reported as CVE-2019-15846. The attack is possible to be carried out remotely. No exploit exists. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability classified as very critical has been found in Exim up to 4.92.1 (Mail Server Software). This affects an unknown code. The manipulation as part of a Backslash leads to a memory corruption vulnerability. CWE is classifying the issue as CWE-119. The product performs operations on a memory buffer, but it can read from or write to a memory location that is outside of the intended boundary of the buffer. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

Exim before 4.92.2 allows remote attackers to execute arbitrary code as root via a trailing backslash.

The weakness was disclosed 09/06/2019 (Website). It is possible to read the advisory at seclists.org. This vulnerability is uniquely identified as CVE-2019-15846 since 09/02/2019. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. The technical details are unknown and an exploit is not publicly available. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 12/13/2023).

Upgrading to version 4.92.2 eliminates this vulnerability. Applying a patch is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Type

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 9.8
VulDB Meta Temp Score: 9.6

VulDB Base Score: 9.8
VulDB Temp Score: 9.4
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 9.8
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: Memory corruption
CWE: CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
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: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Exim 4.92.2
Patch: github.com

Timelineinfo

09/02/2019 🔍
09/06/2019 +4 days 🔍
09/06/2019 +0 days 🔍
12/13/2023 +1559 days 🔍

Sourcesinfo

Product: github.com

Advisory: USN-4124-1
Status: Not defined

CVE: CVE-2019-15846 (🔍)
GCVE (CVE): GCVE-0-2019-15846
GCVE (VulDB): GCVE-100-141327

Entryinfo

Created: 09/06/2019 14:40
Updated: 12/13/2023 13:58
Changes: 09/06/2019 14:40 (51), 09/14/2019 08:33 (2), 08/13/2020 12:34 (1), 12/13/2023 13:58 (7)
Complete: 🔍
Committer: busterb
Cache ID: 216::103

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