Heap-based Buffer Overflow in Exim Email Server Software
CVE-2020-28011

7.8HIGH

Key Information:

Vendor

Exim

Status
Exim
Vendor
CVE Published:
6 May 2021

What is CVE-2020-28011?

A vulnerability exists in the Exim Mail Transfer Agent versions prior to 4.94.2 that allows for a heap-based buffer overflow through specific sender options (-R and -S) used in the queue_run function. This flaw can lead to privilege escalation, enabling an attacker to gain elevated privileges, potentially escalating from Exim user to root level access.

References

https://www.exim.org/static/doc/security/CVE-2020-qualys/...
x_refsource_MISC

CVSS V3.1

Score:
7.8
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Local
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.