# CVE-2019-16928

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.

- Page: https://www.vulneraibility.com/cve/CVE-2019-16928
- CVSS: 9.8
- Known exploited: yes, in CISA KEV since 2022-03-03; CISA due date 2022-03-17
- EPSS: 41.64% (percentile 98.7)
- CISA SSVC: exploitation active, automatable yes, technical impact total (assessed 2025-02-04)
- Weakness: CWE-787
- Published: 2019-09-27

## Affected

- exim:exim
- canonical:ubuntu_linux
- debian:debian_linux
- fedoraproject:fedora

## References

- [other] https://lists.exim.org/lurker/message/20190927.032457.c1044d4c.en.html
- [other] https://bugs.exim.org/show_bug.cgi?id=2449
- [other] https://git.exim.org/exim.git/commit/478effbfd9c3cc5a627fc671d4bf94d13670d65f
- [other] http://www.openwall.com/lists/oss-security/2019/09/28/1
- [other] http://www.openwall.com/lists/oss-security/2019/09/28/2
- [other] http://www.openwall.com/lists/oss-security/2019/09/28/3
- [advisory] https://www.debian.org/security/2019/dsa-4536
- [advisory] https://usn.ubuntu.com/4141-1/
- [other] http://www.openwall.com/lists/oss-security/2019/09/28/4
- [other] https://seclists.org/bugtraq/2019/Sep/60
- [advisory] https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/T3TJW4HPYH3O5HZCWGD6NSHTEBTTAPDC/
- [advisory] https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/UY6HPRW7MR3KBQ5JFHH6OXM7YCZBJCOB/
- [advisory] https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/EED7HM3MFIBAP5OIMJAFJ35JAJABTVSC/
- [advisory] https://security.gentoo.org/glsa/202003-47
- [other] https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2019-16928

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Summary, impact and action are written by the vulneraibility.com AI analysis pipeline from the CVE record, NVD, CISA and FIRST data; verify against the references.