CVE-2019-16928: Exim Out-of-bounds Write Vulnerability
First published: Fri Sep 27 2019(Updated: )
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.
Credit: cve@mitre.org cve@mitre.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Exim Exim | >=4.92<=4.92.2 | |
| Canonical Ubuntu Linux | =19.04 | |
| Debian Debian Linux | =10.0 | |
| Fedoraproject Fedora | =29 | |
| Fedoraproject Fedora | =30 | |
| Fedoraproject Fedora | =31 | |
| Exim Exim Internet Mailer | ||
| debian/exim4 | 4.94.2-7+deb11u3 4.94.2-7+deb11u4 4.96-15+deb12u6 4.96-15+deb12u5 4.98-2 |
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Reference Links
- http://www.openwall.com/lists/oss-security/2019/09/28/1
- http://www.openwall.com/lists/oss-security/2019/09/28/2
- http://www.openwall.com/lists/oss-security/2019/09/28/3
- http://www.openwall.com/lists/oss-security/2019/09/28/4
- https://bugs.exim.org/show_bug.cgi?id=2449
- https://git.exim.org/exim.git/commit/478effbfd9c3cc5a627fc671d4bf94d13670d65f
- https://lists.exim.org/lurker/message/20190927.032457.c1044d4c.en.html
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/EED7HM3MFIBAP5OIMJAFJ35JAJABTVSC/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/T3TJW4HPYH3O5HZCWGD6NSHTEBTTAPDC/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/UY6HPRW7MR3KBQ5JFHH6OXM7YCZBJCOB/
- https://seclists.org/bugtraq/2019/Sep/60
- https://security.gentoo.org/glsa/202003-47
- https://usn.ubuntu.com/4141-1/
- https://www.debian.org/security/2019/dsa-4536
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/EED7HM3MFIBAP5OIMJAFJ35JAJABTVSC/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/T3TJW4HPYH3O5HZCWGD6NSHTEBTTAPDC/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/UY6HPRW7MR3KBQ5JFHH6OXM7YCZBJCOB/
- https://security-tracker.debian.org/tracker/CVE-2019-16928
- https://launchpad.net/bugs/cve/CVE-2019-16928
- https://nvd.nist.gov/vuln/detail/CVE-2019-16928
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-16928
- https://ubuntu.com/security/CVE-2019-16928
Frequently Asked Questions
What is CVE-2019-16928?
CVE-2019-16928 is an Exim vulnerability that allows remote code execution through a heap-based buffer overflow in string_vformat.
What is the severity of CVE-2019-16928?
CVE-2019-16928 is classified as critical with a severity value of 9.8.
Which software is affected by CVE-2019-16928?
Exim Internet Mailer versions 4.92 through 4.92.2, Canonical Ubuntu Linux 19.04, Debian Linux 10.0, and Fedora versions 29, 30, and 31 are affected by CVE-2019-16928.
How can I fix CVE-2019-16928?
To fix CVE-2019-16928, you should update to the latest versions of the affected software, such as Exim 4.92-8+deb10u6 or higher, Exim 4.92-8+deb10u8 or higher, Exim 4.94.2-7 or higher, Exim 4.94.2-7+deb11u1 or higher, Exim 4.96-15+deb12u1 or higher, Exim 4.96-15+deb12u2 or higher, or Exim 4.97~RC2-2 or higher, depending on your software version.
Where can I find more information about CVE-2019-16928?
You can find more information about CVE-2019-16928 at the following references: [Openwall 1](http://www.openwall.com/lists/oss-security/2019/09/28/1), [Openwall 2](http://www.openwall.com/lists/oss-security/2019/09/28/2), [Openwall 3](http://www.openwall.com/lists/oss-security/2019/09/28/3).
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- package-manager/debian
- canonical/exim exim internet mailer