CVE-2019-16928
CRITICAL severity · CVSS 9.8 · Out-of-bounds write · actively exploited (CISA KEV)
9.8CVSS CRITICAL exploited
Actively exploited in the wild (CISA Known Exploited Vulnerabilities).
Added to KEV 2022-03-03. US federal agencies must patch by 2022-03-17.
Summary
Exim 4.92 through 4.92.2 allows remote code execution, a different vulnerability than CVE-2019-15846. There is a heap-based buffer overflow in string_vformat in string.c involving a long EHLO command.
Impact & exploitability
Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionNone
Confidentiality impactHigh
Integrity impactHigh
Availability impactHigh
Exploit probability (EPSS)42%
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Affected products we track (1)
Recommendation
This vulnerability is being actively exploited in the wild — patch affected products urgently. Open any affected product above for its exact safe version.
Official patch: https://bugs.exim.org/show_bug.cgi?id=2449 ↗
Additional information
- NVD record
- https://bugs.exim.org/show_bug.cgi?id=2449Patch
- https://git.exim.org/exim.git/commit/478effbfd9c3cc5a627fc671d4bf94d13670d65fPatch
- https://lists.exim.org/lurker/message/20190927.032457.c1044d4c.en.htmlAdvisory
- http://www.openwall.com/lists/oss-security/2019/09/28/1Advisory
- http://www.openwall.com/lists/oss-security/2019/09/28/3Advisory
- http://www.openwall.com/lists/oss-security/2019/09/28/4Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/EED7HM3MFIBAP5OIMJAFJ35JAJABTVSC/
- http://www.openwall.com/lists/oss-security/2019/09/28/2Advisory