CVE-2020-28018
9.8
CRITICAL · CVSS 3.1 · EPSS 56.8% (pctl 99)
Patch early
EPSS 56.8% — above the 10% action threshold.
Description
Exim 4 before 4.94.2 allows Use After Free in smtp_reset in certain situations that may be common for builds with OpenSSL.
Scoring
| CVSS | 9.8 (CRITICAL, v3.1) |
|---|---|
| Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| EPSS | 56.75% — more likely to be exploited than 99% of all CVEs |
| Weakness | CWE-416 |
| On CISA KEV | no |
| Public exploit | none known |
| Published | 2021-05-06 |
| Last modified | 2026-06-17 |
Affected (1)
| Vendor | Product |
|---|---|
| exim | exim |
References
- http://www.openwall.com/lists/oss-security/2021/05/11/14
- http://www.openwall.com/lists/oss-security/2021/05/11/15
- http://www.openwall.com/lists/oss-security/2021/05/11/17
- http://www.openwall.com/lists/oss-security/2021/05/11/5
- http://www.openwall.com/lists/oss-security/2021/05/11/6
- http://www.openwall.com/lists/oss-security/2021/05/12/2
- http://www.openwall.com/lists/oss-security/2021/05/12/3
- https://www.exim.org/static/doc/security/CVE-2020-qualys/CVE-2020-28018-OCORK.txt
- http://www.openwall.com/lists/oss-security/2021/05/11/14
- http://www.openwall.com/lists/oss-security/2021/05/11/15
- http://www.openwall.com/lists/oss-security/2021/05/11/17
- http://www.openwall.com/lists/oss-security/2021/05/11/5
- http://www.openwall.com/lists/oss-security/2021/05/11/6
- http://www.openwall.com/lists/oss-security/2021/05/12/2
- http://www.openwall.com/lists/oss-security/2021/05/12/3
- https://www.exim.org/static/doc/security/CVE-2020-qualys/CVE-2020-28018-OCORK.txt
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