CVE-2020-28024
Last modified
CVE-2020-28024 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. Exim 4 before 4.94.2 allows Buffer Underwrite that may result in unauthenticated remote attackers executing arbitrary commands, because smtp_ungetc was only intended to push back characters, but can actually push back non-character error codes such as EOF.. EPSS estimates a 4.07% chance of exploitation in the next 30 days.
Description
Exim 4 before 4.94.2 allows Buffer Underwrite that may result in unauthenticated remote attackers executing arbitrary commands, because smtp_ungetc was only intended to push back characters, but can actually push back non-character error codes such as EOF.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Exim | Exim | >= 4.00, < 4.94.2 |
References
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2020-28024?
How severe is CVE-2020-28024?
How do I fix CVE-2020-28024?
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
Related CVEs from 2020
- CVE-2020-28019Exim 4 before 4.94.2 has Improper Initialization that can le…7.5
- CVE-2020-2802Vulnerability in the Oracle GraalVM Enterprise Edition produ…7.7
- CVE-2020-28020Exim 4 before 4.92 allows Integer Overflow to Buffer Overflo…9.8
- CVE-2020-28021Exim 4 before 4.94.2 has Improper Neutralization of Line Del…8.8
- CVE-2020-28022Exim 4 before 4.94.2 has Improper Restriction of Write Opera…9.8
- CVE-2020-28023Exim 4 before 4.94.2 allows Out-of-bounds Read. smtp_setup_m…7.5
- CVE-2020-28025Exim 4 before 4.94.2 allows Out-of-bounds Read because pdkim…7.5
- CVE-2020-28026Exim 4 before 4.94.2 has Improper Neutralization of Line Del…9.8
- CVE-2020-2803Vulnerability in the Java SE, Java SE Embedded product of Or…8.3
- CVE-2020-28030In Wireshark 3.2.0 to 3.2.7, the GQUIC dissector could crash…7.5
- CVE-2020-28031eramba through c2.8.1 allows HTTP Host header injection with…4.3
- CVE-2020-28032WordPress before 5.5.2 mishandles deserialization requests i…9.8
Are you affected by CVE-2020-28024?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST