CVE-2019-16928

Known Exploited Public Exploit

Description

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.

Category

9.8
CVSS
Severity: Critical
CVSS 3.1 •
CVSS 2.0 •
EPSS 88.23% Top 5%
KEV Since 
Vendor Advisory debian.org Vendor Advisory ubuntu.com Vendor Advisory fedoraproject.org Vendor Advisory fedoraproject.org Vendor Advisory fedoraproject.org Vendor Advisory gentoo.org Vendor Advisory exim.org Vendor Advisory exim.org
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
https://lists.exim.org/lurker/message/20190927.032457.c1044d4c.en.html vendor advisory
https://bugs.exim.org/show_bug.cgi?id=2449 issue tracking patch vendor advisory
https://git.exim.org/exim.git/commit/478effbfd9c3cc5a627fc671d4bf94d13670d65f patch
http://www.openwall.com/lists/oss-security/2019/09/28/1 mailing list mitigation exploit third party advisory
http://www.openwall.com/lists/oss-security/2019/09/28/2 mailing list exploit third party advisory
http://www.openwall.com/lists/oss-security/2019/09/28/3 third party advisory mailing list
https://www.debian.org/security/2019/dsa-4536 third party advisory vendor advisory
https://usn.ubuntu.com/4141-1/ third party advisory vendor advisory
http://www.openwall.com/lists/oss-security/2019/09/28/4 third party advisory mailing list
https://seclists.org/bugtraq/2019/Sep/60 third party advisory mailing list
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/T3TJW4HPYH3O5HZCWGD6NSHTEBTTAPDC/ release notes vendor advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/UY6HPRW7MR3KBQ5JFHH6OXM7YCZBJCOB/ release notes vendor advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/EED7HM3MFIBAP5OIMJAFJ35JAJABTVSC/ release notes vendor advisory
https://security.gentoo.org/glsa/202003-47 third party advisory vendor advisory

Frequently Asked Questions

What is the severity of CVE-2019-16928?
CVE-2019-16928 has been scored as a critical severity vulnerability.
How to fix CVE-2019-16928?
To fix CVE-2019-16928, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2019-16928 being actively exploited in the wild?
It is confirmed that CVE-2019-16928 is actively exploited. Be extra cautious if you are using vulnerable components. According to its EPSS score, there is a ~88% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
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