CVE-2020-28020

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.

CVSS v3.1 NVD

9.8 CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS v2.0 NVD

7.5 HIGHAV:N/AC:L/Au:N/C:P/I:P/A:P

EPSS

7.94% chance of exploitation in the next 30 days, 95th percentile

Published

2021-05-06

Updated

2024-08-04

Proof-of-concept exploits (2)

• http://www.openwall.com/lists/oss-security/2021/07/25/1
• http://www.openwall.com/lists/oss-security/2021/08/03/1

Security advisories

• https://www.exim.org/static/doc/security/CVE-2020-qualys/CVE-2020-28020-HSIZE.txt

References

• CVE Record
• NVD entry