Exim · Mail Transfer Agent (MTA)
CVE-2019-10149
Exim Mail Transfer Agent (MTA) Improper Input Validation
Exploited in attacks
Critical 9.0 Attack chance: >99.9%
What it is
A flaw was found in Exim versions 4.87 to 4.91 (inclusive). Improper validation of recipient address in deliver_message() function in /src/deliver.c may lead to remote command execution.
CISA: Improper validation of recipient address in deliver_message() function in /src/deliver.c may lead to remote command execution.
What to do
Apply updates per vendor instructions.
Deadline for US federal agencies: July 10, 2022
- Added to the CISA list
- January 10, 2022
- Published
- June 5, 2019
- Severity
- Critical 9.0 CVSS 3.0
- Chance of attacks in the next 30 days (EPSS)
- >99.9% in the top 0.1% of all known vulnerabilities
- Weakness
- CWE-78
- More details
- NVD · CVE.org · CISA
All references (20)
- https://usn.ubuntu.com/4010-1/
- https://www.debian.org/security/2019/dsa-4456
- https://security.gentoo.org/glsa/201906-01
- http://lists.opensuse.org/opensuse-security-announce/2019-06/msg00020.html
- http://www.openwall.com/lists/oss-security/2019/06/05/2
- http://www.openwall.com/lists/oss-security/2019/06/05/3
- http://www.openwall.com/lists/oss-security/2019/06/05/4
- https://seclists.org/bugtraq/2019/Jun/5
- http://www.openwall.com/lists/oss-security/2019/06/06/1
- http://www.securityfocus.com/bid/108679
- http://seclists.org/fulldisclosure/2019/Jun/16
- http://www.openwall.com/lists/oss-security/2019/07/25/6
- http://www.openwall.com/lists/oss-security/2019/07/25/7
- http://www.openwall.com/lists/oss-security/2019/07/26/4
- http://www.openwall.com/lists/oss-security/2021/05/04/7
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-10149
- https://www.exim.org/static/doc/security/CVE-2019-10149.txt
- http://packetstormsecurity.com/files/153218/Exim-4.9.1-Remote-Command-Execution.html
- http://packetstormsecurity.com/files/153312/Exim-4.91-Local-Privilege-Escalation.html
- http://packetstormsecurity.com/files/154198/Exim-4.91-Local-Privilege-Escalation.html
More exploited flaws from Exim
| Added | Vulnerability | Product | Severity | Attack chance |
|---|---|---|---|---|
| Mar 25, 2022 | Heap-Based Buffer Overflow | Exim | Critical 9.8 | 72% |
| Mar 25, 2022 | Privilege Escalation | Exim | High 7.8 | 18% |
| Mar 3, 2022 | Out-of-bounds Write | Exim Internet Mailer | Critical 9.8 | 42% |
| Nov 3, 2021 | Buffer Overflow | Exim | Critical 9.8 | 82% |
Sources: Known Exploited Vulnerabilities (CISA, public domain), CVE records (cve.org) and EPSS (FIRST). The chance of attacks is the EPSS estimate that someone will try to exploit the flaw in the next 30 days.