CVE-2020-28017: Buffer Overflow
Exim 4 before 4.94.2 allows Integer Overflow to Buffer Overflow in receiveaddrecipient via an e-mail message with fifty million recipients. NOTE: remote exploitation may be difficult because of resource consumption.
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade
alpine/eximto a version that resolves this vulnerability.Fixed in 4.94.2-r0
Event History
Frequently Asked Questions
What is CVE-2020-28017?
CVE-2020-28017 is a vulnerability in Exim 4 before version 4.94.2 that allows an integer overflow to a buffer overflow in the receive_add_recipient function.
What is the severity of CVE-2020-28017?
CVE-2020-28017 has a severity rating of 9.8, which is considered critical.
How does CVE-2020-28017 affect Exim?
CVE-2020-28017 affects Exim 4 versions before 4.94.2.
How can CVE-2020-28017 be exploited?
Exploiting CVE-2020-28017 remotely may be difficult due to resource consumption.
Where can I find more information about CVE-2020-28017?
More information about CVE-2020-28017 can be found at https://www.exim.org/static/doc/security/CVE-2020-qualys/CVE-2020-28017-RCPTL.txt.