CVE-2019-16928
Exploited in the wild. In CISA KEV since 2022‑03‑03. A vendor fix is available.
What to do
The vendor has published a fix. Version details are below where the sources state them.
- EximAffected: ≥ 4.92, ≤ 4.92.2Upgrade to: after 4.92.2Stated by: NVD
- Fedora Project FedoraAffected: 29Upgrade to: not statedStated by: BDU
- Canonical Ltd. UbuntuAffected: 19.04Upgrade to: not statedStated by: BDU
- Сообщество свободного программного обеспечения Debian GNU/LinuxAffected: 10Upgrade to: not statedStated by: BDU
- GNU General Public License eximAffected: от 4.92 до 4.92.2 включительноUpgrade to: not statedStated by: BDU
Versions as the sources state them. 1 more product has version data. Full version matrix after sign-in
Coverage timeline
0 publishersAdded to CISA KEV catalog
Sourced from public security reporting — each date is when it was published, not when it happened.
What it is
From the CVE record
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.
In plain language
No plain-language summary for this CVE yet.
Exploitation
Where each signal puts this CVE on the scale from published to confirmed exploited.
- CISA KEV
Listed as exploited in the wild since 2022-03-03.
US federal agencies must remediate by 2022-03-17.
Apply updates per vendor instructions.
- Public exploits
No public exploit or proof of concept found in the sources we track.
- EPSS
42% chance of exploitation activity in the next 30 days, which ranks it in the 99th percentile of scored CVEs.
Exploit Prediction Scoring System, FIRST.org. A probability, not a confirmation.
Lifecycle
11 events over 2463 days, from the signal feeds we watch.
- OpenVAS check added
- EPSS band changecritical → moderate
- EPSS band changehigh → critical
- Nuclei check added
- Patch availableworkaround available, record updated
- Added to CISA KEV
Affected products
And 4 more affected products. See all after sign-in
Technical detail
CVSS 3.1 vector
Open in the CVSS calculatorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Scored 9.8 by NVD.
How it is reached
- Attack Vector NetworkExploitable remotely over the network without any special conditions
- Attack Complexity LowNo special conditions — the attack can be reliably reproduced
- Privileges Required NoneNo authentication required — anyone can exploit this
- User Interaction NoneNo user interaction needed — fully automated exploitation
Scope
- Scope UnchangedImpact is limited to the vulnerable component itself
Impact if exploited
- Confidentiality HighTotal information disclosure — all data in the component is compromised
- Integrity HighTotal loss of integrity — attacker can modify any data in the component
- Availability HighTotal denial of service — the component is completely unavailable
Weaknesses
ATT&CK techniques
Mapped from the weaknesses above (CWE to ATT&CK), not observed in attacks.
- Initial AccessT1190Exploit Public-Facing Applicationhigh confidence
- Privilege EscalationT1068Exploitation for Privilege Escalationhigh confidence
Sources
References in the record
- openwall.com/lists/oss-security/2019/09/28/1
- openwall.com/lists/oss-security/2019/09/28/2
- openwall.com/lists/oss-security/2019/09/28/3
And 21 more references. See all after sign-in
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