VulnerabilityAnalyzed
CVE-2019-16928
Exim Out-of-bounds Write Vulnerability
KEVCRITICAL 9.8EPSS 41.6%
Does this matter?
Known to be exploited in the wild (CISA KEV, CISA remediation deadline 17 March 2022). Treat as an emergency change: patch or isolate now, then hunt for prior compromise.
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.
- CVSS 3.1
- 9.8 CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 41.64% probability · 99th percentile
- CISA KEV
- Listed 3 March 2022 · due 17 March 2022
- Weakness
- CWE-787
- Affected
- exim/exim · canonical/ubuntu linux · debian/debian linux · fedoraproject/fedora
- Source
- cve@mitre.org
CISA notes
Apply updates per vendor instructions. https://nvd.nist.gov/vuln/detail/CVE-2019-16928
References
- http://www.openwall.com/lists/oss-security/2019/09/28/1Exploit, Mailing List, Mitigation, Third Party Advisory
- http://www.openwall.com/lists/oss-security/2019/09/28/2Exploit, Mailing List, Third Party Advisory
- http://www.openwall.com/lists/oss-security/2019/09/28/3Mailing List, Third Party Advisory
- http://www.openwall.com/lists/oss-security/2019/09/28/4Mailing List, Third Party Advisory
- https://bugs.exim.org/show_bug.cgi?id=2449Issue Tracking, Patch, Vendor Advisory
- https://git.exim.org/exim.git/commit/478effbfd9c3cc5a627fc671d4bf94d13670d65fPatch
- https://lists.exim.org/lurker/message/20190927.032457.c1044d4c.en.htmlVendor Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/EED7HM3MFIBAP5OIMJAFJ35JAJABTVSC/Release Notes
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/T3TJW4HPYH3O5HZCWGD6NSHTEBTTAPDC/Release Notes
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/UY6HPRW7MR3KBQ5JFHH6OXM7YCZBJCOB/Release Notes
- https://seclists.org/bugtraq/2019/Sep/60Mailing List, Third Party Advisory
- https://security.gentoo.org/glsa/202003-47Third Party Advisory
- https://usn.ubuntu.com/4141-1/Third Party Advisory
- https://www.debian.org/security/2019/dsa-4536Third Party Advisory
- http://www.openwall.com/lists/oss-security/2019/09/28/1Exploit, Mailing List, Mitigation, Third Party Advisory
- http://www.openwall.com/lists/oss-security/2019/09/28/2Exploit, Mailing List, Third Party Advisory
- http://www.openwall.com/lists/oss-security/2019/09/28/3Mailing List, Third Party Advisory
- http://www.openwall.com/lists/oss-security/2019/09/28/4Mailing List, Third Party Advisory
- https://bugs.exim.org/show_bug.cgi?id=2449Issue Tracking, Patch, Vendor Advisory
- https://git.exim.org/exim.git/commit/478effbfd9c3cc5a627fc671d4bf94d13670d65fPatch
- https://lists.exim.org/lurker/message/20190927.032457.c1044d4c.en.htmlVendor Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/EED7HM3MFIBAP5OIMJAFJ35JAJABTVSC/Release Notes
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/T3TJW4HPYH3O5HZCWGD6NSHTEBTTAPDC/Release Notes
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/UY6HPRW7MR3KBQ5JFHH6OXM7YCZBJCOB/Release Notes
- https://seclists.org/bugtraq/2019/Sep/60Mailing List, Third Party Advisory
- https://security.gentoo.org/glsa/202003-47Third Party Advisory
- https://usn.ubuntu.com/4141-1/Third Party Advisory
- https://www.debian.org/security/2019/dsa-4536Third Party Advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2019-16928US Government Resource
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.