HOMEVULNERABILITIESCVE-2019-13917
CRITICAL

CVE-2019-13917

CWE-19Published: July 25, 2019· Updated: Jun 17, 2026

9.8
CVSS v3.1

Official Description

Exim 4.85 through 4.92 (fixed in 4.92.1) allows remote code execution as root in some unusual configurations that use the ${sort } expansion for items that can be controlled by an attacker (e.g., $local_part or $domain).

NVD Source

Technical Analysis

CVE-2019-13917 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 9.8.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges Req.None
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected Vendors & Products

Debian1 product(s)
debian linux
exim1 product(s)
exim
Source: NVD CPE · 3 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

PATCHhttp://exim.org/static/doc/security/CVE-2019-13917.txt
PATCHhttp://exim.org/static/doc/security/CVE-2019-13917.txt
ADVISORYhttp://www.openwall.com/lists/oss-security/2019/07/26/5
ADVISORYhttps://seclists.org/bugtraq/2019/Jul/51
ADVISORYhttps://www.debian.org/security/2019/dsa-4488
ADVISORYhttp://www.openwall.com/lists/oss-security/2019/07/26/5
ADVISORYhttps://seclists.org/bugtraq/2019/Jul/51
ADVISORYhttps://www.debian.org/security/2019/dsa-4488

All References (10)

→
http://exim.org/static/doc/security/CVE-2019-13917.txtPatch · Vendor Advisory
→
http://www.openwall.com/lists/oss-security/2019/07/26/5Third Party Advisory
→
https://seclists.org/bugtraq/2019/Jul/51Third Party Advisory
→
https://security.gentoo.org/glsa/201909-06
→
https://www.debian.org/security/2019/dsa-4488Third Party Advisory
→
http://exim.org/static/doc/security/CVE-2019-13917.txtPatch · Vendor Advisory
→
http://www.openwall.com/lists/oss-security/2019/07/26/5Third Party Advisory
→
https://seclists.org/bugtraq/2019/Jul/51Third Party Advisory
→
https://security.gentoo.org/glsa/201909-06
→
https://www.debian.org/security/2019/dsa-4488Third Party Advisory

Quick Facts

CVE IDCVE-2019-13917
CVSS Score9.8 / 10
SeverityCRITICAL
WeaknessCWE-19
CISA KEVNo
Affected2 vendor(s)
PublishedJul 25, 2019

Related CVEs (CWE-19)

CVE-2015-2373
10.0
CVE-2014-7247
10.0
CVE-1999-0226
10.0
CVE-2014-8822
10.0
CVE-2014-4488
10.0
CVE-2014-8817
10.0

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2019-13917 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWatch. CVE data is provided under the NVD usage policy.
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