CVE-2019-3823
libcurl versions from 7.34.0 to before 7.64.0 are vulnerable to a heap out-of-bounds read in the code handling the end-of-response for SMTP. If the buffer passed to `smtp_endofresp()` isn't NUL terminated and contains no character ending the parsed number, and `len` is set to 5, then the `strtol()` call reads beyond the allocated buffer. The read contents will not be returned to the caller.
Key facts
- CVSS score
- 4.3 (v3.0)
- Severity
- MEDIUM
- CVSS vector
CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N- Weakness (CWE)
- CWE-125
- EPSS score
- 4.1% (91th percentile)
- In CISA KEV
- No
- In EU EUVD
- Yes (EUVD-2019-13446)
- Published
- February 6, 2019
- NVD last modified
- June 17, 2026
- Status
- Modified
EU Vulnerability Database (EUVD)
This vulnerability is also tracked by ENISA as EUVD-2019-13446 in the EU Vulnerability Database. Last updated in EUVD on April 15, 2026.
View on the EU Vulnerability DatabaseAffected products
- canonical / ubuntu linux
- canonical / ubuntu linux
- canonical / ubuntu linux
- canonical / ubuntu linux
- debian / debian linux
- haxx / libcurl
- netapp / clustered data ontap
- oracle / communications operations monitor
- oracle / communications operations monitor
- oracle / http server
- oracle / secure global desktop
Certified products that may be affected
1 FIPS 140 or Common Criteria certified product, from automated matching by sec-certs.org.
- NetApp ONTAP® 9.1 - NetApp, Inc. - Common Criteria 383-4-423 - archived
References
- http://www.securityfocus.com/bid/106950(Third Party Advisory, VDB Entry)
- https://access.redhat.com/errata/RHSA-2019:3701
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-3823(Exploit, Issue Tracking, Patch, Third Party Advisory)
- https://cert-portal.siemens.com/productcert/pdf/ssa-936080.pdf
- https://curl.haxx.se/docs/CVE-2019-3823.html(Patch, Vendor Advisory)
- https://lists.apache.org/thread.html/8338a0f605bdbb3a6098bb76f666a95fc2b2f53f37fa1ecc89f1146f%40%3Cdevnull.infra.apache.org%3E
- https://security.gentoo.org/glsa/201903-03(Third Party Advisory)
- https://security.netapp.com/advisory/ntap-20190315-0001/(Exploit, Third Party Advisory)
- https://usn.ubuntu.com/3882-1/(Third Party Advisory)
- https://www.debian.org/security/2019/dsa-4386(Third Party Advisory)
- https://www.oracle.com/technetwork/security-advisory/cpuapr2019-5072813.html(Patch, Third Party Advisory)
- https://www.oracle.com/technetwork/security-advisory/cpujul2019-5072835.html
Last updated September 17, 2026 · Source: NVD, CISA KEV, FIRST.org EPSS
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