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CVE-2019-3823

Published: 6 February 2019

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.

Priority

Low

Cvss 3 Severity Score

7.5

Score breakdown

Status

Package Release Status
curl
Launchpad, Ubuntu, Debian
hirsute
Released (7.64.0-1ubuntu1)
bionic
Released (7.58.0-2ubuntu3.6)
cosmic
Released (7.61.0-1ubuntu2.3)
disco
Released (7.64.0-1ubuntu1)
eoan
Released (7.64.0-1ubuntu1)
focal
Released (7.64.0-1ubuntu1)
groovy
Released (7.64.0-1ubuntu1)
trusty
Released (7.35.0-1ubuntu2.20)
upstream
Released (7.64.0)
xenial
Released (7.47.0-1ubuntu2.12)

Severity score breakdown

Parameter Value
Base score 7.5
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Scope Unchanged
Confidentiality None
Integrity impact None
Availability impact High
Vector CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H