Denial of Service Vulnerability in Fetchmail Mail Transfer Agent
CVE-2021-36386

7.5HIGH

Key Information:

Vendor

Fetchmail

Status
Fetchmail
Vendor
CVE Published:
30 July 2021

What is CVE-2021-36386?

The Fetchmail mail transfer agent, prior to version 6.4.20, contains a vulnerability in its report_vbuild function which may lead to a denial of service. This occurs when the vsnprintf va_list argument is not correctly initialized, allowing long error messages from mail servers to potentially disrupt service. Although the impact on clients might be limited, this could lead to operational inconveniences.

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References

https://www.fetchmail.info/security.html
x_refsource_MISC
http://www.openwall.com/lists/oss-security/2021/07/28/5
x_refsource_MISC
https://www.fetchmail.info/fetchmail-SA-2021-01.txt
x_refsource_CONFIRM

CVSS V3.1

Score:
7.5
Severity:
HIGH
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

JSON
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