What is CVE-2019-10149?

CVE-2019-10149 is a critical-severity vulnerability in Exim, classified under OS Command Injection. CVSS score: 9.0/10. Published 2019-06-05.

How severe is CVE-2019-10149?

Critical severity. CVSS v3 base score is 9.0 out of 10.

Is CVE-2019-10149 known to be exploited?

Yes. CVE-2019-10149 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2022-01-10), indicating it is being actively exploited. 43 public proof-of-concept repositories are indexed.

RCE in Exim

CVE-2019-10149

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.

Vulnerability class: Command Injection (OS Command Injection)

EPSS: 0.939 (99.9th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.0 (Critical). Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H.

Affected products

Exim — versions 4.92

Weakness classification (CWE)

CWE-78 — OS Command Injection

CISA KEV (Known Exploited Vulnerabilities)

This CVE is on the CISA KEV catalog, added on 2022-01-10. CISA KEV inclusion means CISA has confirmed in-the-wild exploitation; US federal agencies are required to remediate within a published due date.

BOD 22-01 due date: 2022-07-10.

Required action: Apply updates per vendor instructions.

Public proof-of-concept exploits

References

[oss-security] 20190605 Re: CVE-2019-10149: Exim 4.87 to 4.91: possible remote exploit (mailing-list)
USN-4010-1 (vendor-advisory)
[oss-security] 20190605 Re: CVE-2019-10149: Exim 4.87 to 4.91: possible remote exploit (mailing-list)
[oss-security] 20190605 Re: CVE-2019-10149: Exim 4.87 to 4.91: possible remote exploit (mailing-list)
DSA-4456 (vendor-advisory)
20190605 [SECURITY] [DSA 4456-1] exim4 security update (mailing-list)
GLSA-201906-01 (vendor-advisory)
[oss-security] 20190606 Re: CVE-2019-10149: Exim 4.87 to 4.91: possible remote exploit (mailing-list)
108679 (vdb-entry)
openSUSE-SU-2019:1524 (vendor-advisory)

Frequently asked questions

What is CVE-2019-10149?: CVE-2019-10149 is a critical-severity vulnerability in Exim, classified under OS Command Injection. CVSS score: 9.0/10. Published 2019-06-05.
How severe is CVE-2019-10149?: Critical severity. CVSS v3 base score is 9.0 out of 10.
Is CVE-2019-10149 known to be exploited?: Yes. CVE-2019-10149 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2022-01-10), indicating it is being actively exploited. 43 public proof-of-concept repositories are indexed.