CVEs / CVE-2019-16928
CVE-2019-16928: Exim Out-of-bounds Write Vulnerability
- Known exploited in the CISA KEV catalog since 3 Mar 2022
- critical 9.8 CVSS 3.1 (NVD)
- EPSS 41.6% chance of exploitation in the next 30 days, higher than 98% of CVEs (30 Oct 2026)
- Last changed at its sources
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Summary
Exim contains an out-of-bounds write vulnerability which can allow for remote code execution.
Description
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.
Affected and fixed versions
| Product | Affected | Fixed in |
|---|---|---|
| n/a n/a | n/a | — |
Exploitation
| In CISA KEV since | 3 Mar 2022 |
|---|---|
| Due date for US federal agencies | 17 Mar 2022 |
| Used in ransomware campaigns | Unknown |
| Required action | Apply updates per vendor instructions. |
Severity
| CVSS 3.1 | 9.8 criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HScored by NVD |
|---|---|
| Weakness | CWE-787 |
References
- CVE-2019-16928 on NVD
- CVE-2019-16928 in the CISA KEV catalog
- CVE-2019-16928 on OSV
- http://www.openwall.com/lists/oss-security/2019/09/28/1 Exploit, Mailing List, Mitigation, Third Party Advisory
- http://www.openwall.com/lists/oss-security/2019/09/28/2 Exploit, Mailing List, Third Party Advisory
- http://www.openwall.com/lists/oss-security/2019/09/28/3 Mailing List, Third Party Advisory
- http://www.openwall.com/lists/oss-security/2019/09/28/4 Mailing List, Third Party Advisory
- https://bugs.exim.org/show_bug.cgi?id=2449 Issue Tracking, Patch, Vendor Advisory
- https://git.exim.org/exim.git/commit/478effbfd9c3cc5a627fc671d4bf94d13670d65f Patch
- https://lists.exim.org/lurker/message/20190927.032457.c1044d4c.en.html Vendor Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/EED7HM3MFIBAP5OIMJAFJ35JAJABTVSC/ Release Notes
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/T3TJW4HPYH3O5HZCWGD6NSHTEBTTAPDC/ Release Notes
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/UY6HPRW7MR3KBQ5JFHH6OXM7YCZBJCOB/ Release Notes
- https://seclists.org/bugtraq/2019/Sep/60 Mailing List, Third Party Advisory
- https://security.gentoo.org/glsa/202003-47 Third Party Advisory
- https://usn.ubuntu.com/4141-1/ Third Party Advisory
- https://www.debian.org/security/2019/dsa-4536 Third Party Advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2019-16928 US Government Resource
Sources
Exploitation status from the CISA Known Exploited Vulnerabilities catalog. EPSS scores from FIRST. Descriptions, severity and references from the National Vulnerability Database. Open-source package versions from OSV (CC-BY 4.0). Text is shown as each source states it; Stackurity does not edit it. Check the vendor's advisory before acting.
This product uses data from the NVD API but is not endorsed or certified by the NVD.