CVEvulnerability
CVE-2020-28020
9.8 CRITICAL
Official page ↗
- Status
- Modified
- Published
- 2021-05-06
- Last modified
- 2026-06-17
- Assigner
- [email protected]
- CVSS 3.1 ([email protected])
- 9.8 CRITICAL — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- CVSS 2.0 ([email protected])
- 7.5 HIGH — AV:N/AC:L/Au:N/C:P/I:P/A:P
- Weaknesses
- CWE-190
Description
Exim 4 before 4.92 allows Integer Overflow to Buffer Overflow, in which an unauthenticated remote attacker can execute arbitrary code by leveraging the mishandling of continuation lines during header-length restriction.
Affected configurations
• exim exim (>= 4.00 < 4.92)
Related
Weakness · CWE (1)
- CWE-190 Integer Overflow or Wraparound weakness
References
- http://www.openwall.com/lists/oss-security/2021/07/25/1 Mailing List, Third Party Advisory
- http://www.openwall.com/lists/oss-security/2021/08/03/1 Mailing List, Third Party Advisory
- https://www.exim.org/static/doc/security/CVE-2020-qualys/CVE-2020-28020-HSIZE.txt Patch, Third Party Advisory
- http://www.openwall.com/lists/oss-security/2021/07/25/1 Mailing List, Third Party Advisory
- http://www.openwall.com/lists/oss-security/2021/08/03/1 Mailing List, Third Party Advisory
- https://www.exim.org/static/doc/security/CVE-2020-qualys/CVE-2020-28020-HSIZE.txt Patch, Third Party Advisory