CVE-2019-16928
Confirmed PUBLISHEDExim 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...
Recommended Action
Prioritize remediation. Validate affected assets and apply vendor fixes on an accelerated timeline.
At a Glance
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.
- CVE Published
- Sep 27, 2019
- Exploitation Reported
- Mar 03, 2022
- CVSS
- 9.8 Critical
- EPSS
- —
Affected Versions
| Vendor | Product | Version | Status |
|---|---|---|---|
| n/a |
n/a
|
n/a |
Affected |
CVE References
- DSA-4536 debian.org · Vendor Advisory https://www.debian.org/security/2019/dsa-4536
- USN-4141-1 usn.ubuntu.com · Vendor Advisory https://usn.ubuntu.com/4141-1/
- FEDORA-2019-006dfc94cd lists.fedoraproject.org · Vendor Advisory https://lists.fedoraproject.org/archives/list/package-announce%40list...
- FEDORA-2019-e080507ba5 lists.fedoraproject.org · Vendor Advisory https://lists.fedoraproject.org/archives/list/package-announce%40list...
- FEDORA-2019-d778bd4137 lists.fedoraproject.org · Vendor Advisory https://lists.fedoraproject.org/archives/list/package-announce%40list...
Show 9 more references
- GLSA-202003-47 security.gentoo.org · Vendor Advisory https://security.gentoo.org/glsa/202003-47
- [oss-security] 20190928 Exim CVE-2019-16928 RCE using a heap-based buffer overflow openwall.com · Mailing List http://www.openwall.com/lists/oss-security/2019/09/28/1
- [oss-security] 20190928 Re: Exim CVE-2019-16928 RCE using a heap-based buffer overflow openwall.com · Mailing List http://www.openwall.com/lists/oss-security/2019/09/28/2
- [oss-security] 20190928 Re: Exim CVE-2019-16928 RCE using a heap-based buffer overflow openwall.com · Mailing List http://www.openwall.com/lists/oss-security/2019/09/28/3
- [oss-security] 20190929 Re: Exim CVE-2019-16928 RCE using a heap-based buffer overflow openwall.com · Mailing List http://www.openwall.com/lists/oss-security/2019/09/28/4
- 20190929 [SECURITY] [DSA 4536-1] exim4 security update seclists.org · Mailing List https://seclists.org/bugtraq/2019/Sep/60
- lists.exim.org/lurker/message/20190927.032457.c1044d4c.en.html lists.exim.org · CVE Record https://lists.exim.org/lurker/message/20190927.032457.c1044d4c.en.html
- bugs.exim.org/show_bug.cgi bugs.exim.org · CVE Record https://bugs.exim.org/show_bug.cgi?id=2449
- git.exim.org/exim.git/commit/478effbfd9c3cc5a627fc671d4bf... git.exim.org · CVE Record https://git.exim.org/exim.git/commit/478effbfd9c3cc5a627fc671d4bf94d1...
Recommended Actions
- Prioritize remediation. Validate affected assets and apply vendor fixes on an accelerated timeline.
- Use the Pro API to automate enrichment, telemetry, and workflow delivery for VM, SOC, and CTI pipelines.
Known Exploited Vulnerability Sources
Catalogues that list this CVE as a known exploited vulnerability.
Per-source evidence links for KEV attestations are available through the KEVIntel Pro API.
Learn about Pro API access| Source | Added |
|---|---|
| CISA First | 2022-03-03 00:00 UTC |
No detection artifacts or sensor request patterns are available for this CVE yet.
Check back as sensor telemetry and scanner integrations are updated.
Virtual Patch
Compensating WAF rules to help reduce exposure to this CVE. Rule content and deployable vendor exports are available with KEVIntel Enterprise.
KEVIntel does not currently have a virtual patch for this CVE. When available, KEVIntel virtual patches ship as deployable ModSecurity, Cloudflare, and AWS WAF rules.
Enterprise feature. Virtual patch rule content and deployable vendor exports (ModSecurity, Cloudflare, AWS WAF) are available to KEVIntel Enterprise users.
CVSS Scores
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
AV:N/AC:L/Au:N/C:P/I:P/A:P
Exploitation Status
Exploited in the wild
Recorded 2022-03-03 00:00:00 UTC · CISA
Weaknesses (CWE)
-
Out-of-bounds Write
Timeline
Key exploitation, disclosure, scanner coverage, and KEV attestation events for this CVE.
-
00:00 UTC over 4 years ago00:00 UTC · over 4 years ago
Added to CISA KEV
Listed in the CISA Known Exploited Vulnerabilities catalog
-
20:07 UTC almost 7 years ago20:07 UTC · almost 7 years ago
CVE published
Vulnerability disclosed publicly
-
00:00 UTC almost 7 years ago00:00 UTC · almost 7 years ago
CVE ID reserved
Identifier reserved by the CNA
Automate This Intelligence with the Pro API
Confidence scoring, exploit status, sensor telemetry, PoCs, scanner integrations, mentions, and tags are available programmatically for VM, SOC, and CTI workflows.
Pro API Example
GET /api/v2/pro/kevs/CVE-2019-16928
{
"cve_id": "CVE-2019-16928",
"title": "Exim 4.92 through 4.92.2 allows remote code execution, a different vulnerabil...",
"affected_vendor": "Exim",
"affected_product": "Exim",
"affected_versions": [
{ "vendor": "...", "product": "...", "status": "affected", "display_label": "..." }
],
"confidence": "Confirmed",
"cvss_score": 9.8,
"epss_score": null,
"exploit_status": {
"exploited_in_the_wild": true,
"active_exploitation_observed": false
},
"sensor_telemetry": { "...": "Pro API fields" },
"proof_of_concepts": [ "..." ],
"scanner_integrations": [ "..." ]
}