CVE-2019-10149

Home/CVE/Exim Mail Transfer Agent (MTA) Improper Input Validation

CVE

Exim Mail Transfer Agent (MTA) Improper Input Validation

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.

CRITICAL · CVSS 9.8 ⚠ CISA KEV EPSS 0.93918

Act now

Listed on CISA KEV (known exploited in the wild)
SSVC exploitation status: active
EPSS ≥ 0.50 - high probability of exploitation in the next 30 days
EPSS percentile: top 0% of all CVEs by exploitation likelihood
Public exploit or PoC is available
CVSS base score ≥ 7.0

Sigma rules0 YARA rules1

⬢

Required Remediation

Apply updates per vendor instructions.

⬡

Weakness Classification

CWE-78Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')

▤

Affected Products & Versions

exim>= 4.87 and <= 4.91
canonical ubuntu linuxall versions
debian linuxall versions

⚠

Public Exploits & PoCs

localExim 4.87 / 4.91 - Local Privilege Escalation (Metasploit)verified
localExim 4.87 - 4.91 - Local Privilege Escalationverified
remoteExim 4.87 < 4.91 - (Local / Remote) Command Execution2019-06-05
pocpacketstormsecurity.com · Exim-4.9.1-Remote-Command-Execution.htmlpacketstormsecurity.com
pocpacketstormsecurity.com · Exim-4.91-Local-Privilege-Escalation.htmlpacketstormsecurity.com
pocpacketstormsecurity.com · Exim-4.91-Local-Privilege-Escalation.htmlpacketstormsecurity.com

▣

Scoring & Timeline

9.8

CRITICAL · CVSS v3.1 · secalert@redhat.com

View on NVD

Attack Vector

Network Adjacent Local Physical

Attack Complexity

Low High

Privileges Required

None Low High

User Interaction

None Required

Scope

Unchanged Changed

Confidentiality

None Low High

Integrity

None Low High

Availability

None Low High

Published to NVD05 Jun 2019 · 02:29 PM

CVSS VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

SSVC triage · cisa-vulnrichment

Exploitation

active

Automatable

Technical impact

total

SSVC asks the questions that actually drive patch urgency: is it being exploited, can attacks be automated, and how total is the impact.

⚑

Vendor Advisories

suse-csafopenSUSE-SU-2024:10746-1
cisaKEV-CVE-2019-10149
suse-csafopenSUSE-SU-2021:0753-1
suse-csafopenSUSE-SU-2021:0754-1
suse-csafopenSUSE-SU-2021:0677-1
Show all 7 vendor advisoriessuse-csafopenSUSE-SU-2019:1524-1
usnUSN-4010-1

🔗

References & Sources

Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.

http://lists.opensuse.org/opensuse-security-announce/2019-06/msg00020.htmlMailing ListThird Party Advisory

http://seclists.org/fulldisclosure/2019/Jun/16Mailing ListThird Party Advisory

http://www.openwall.com/lists/oss-security/2019/06/05/2Mailing ListThird Party Advisory

http://www.openwall.com/lists/oss-security/2019/06/05/3Mailing ListPatchThird Party Advisory

http://www.openwall.com/lists/oss-security/2019/06/05/4ExploitMailing List

http://www.openwall.com/lists/oss-security/2019/06/06/1ExploitMailing ListThird Party Advisory

Show all 18 references

http://www.openwall.com/lists/oss-security/2019/07/25/6Mailing ListThird Party Advisory

http://www.openwall.com/lists/oss-security/2019/07/25/7Mailing ListThird Party Advisory

http://www.openwall.com/lists/oss-security/2019/07/26/4Mailing ListThird Party Advisory

http://www.openwall.com/lists/oss-security/2021/05/04/7Mailing ListThird Party Advisory

http://www.securityfocus.com/bid/108679Broken LinkThird Party AdvisoryVDB Entry

https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-10149Issue TrackingThird Party Advisory

https://seclists.org/bugtraq/2019/Jun/5Mailing ListThird Party Advisory

https://security.gentoo.org/glsa/201906-01Third Party Advisory

https://usn.ubuntu.com/4010-1/Third Party Advisory

https://www.debian.org/security/2019/dsa-4456Third Party Advisory

https://www.exim.org/static/doc/security/CVE-2019-10149.txtVendor Advisory

https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2019-10149US Government Resource

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