CVE-2019-3823

MEDIUM
4.3
CVSS Score
Published: February 6, 2019 at 08:00 PM UTC
Updated: June 17, 2026 at 02:35 AM UTC
8 products affected across 5 vendorsDebian LinuxUbuntu LinuxClustered Data ONTAP

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Severity
MEDIUM4.3
Exploit prediction
EPSS 4%
SSVC
No known exploit

Description

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

7.34.0 ≤ v < 7.64.0
Affected range stops below 7.64.0, so it looks safe — our inference, not a vendor statement

References (12)

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

4.3MEDIUMredhat
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality
LOW
Integrity
NONE
Availability
NONE
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-125

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