CVE-2019-3823

Public 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.

Category

4.3
CVSS
Severity: Medium
CVSS 3.0 •
CVSS 2.0 •
EPSS 1.37% Top 25%
Vendor Advisory gentoo.org Vendor Advisory debian.org Vendor Advisory ubuntu.com Vendor Advisory redhat.com Vendor Advisory haxx.se
Affected: The curl Project curl
Published at:
Updated at:

References

Link Tags
https://security.gentoo.org/glsa/201903-03 third party advisory vendor advisory
https://www.debian.org/security/2019/dsa-4386 third party advisory vendor advisory
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-3823 patch exploit third party advisory issue tracking
https://curl.haxx.se/docs/CVE-2019-3823.html patch vendor advisory
https://security.netapp.com/advisory/ntap-20190315-0001/ third party advisory exploit
https://usn.ubuntu.com/3882-1/ third party advisory vendor advisory
http://www.securityfocus.com/bid/106950 third party advisory vdb entry
https://lists.apache.org/thread.html/8338a0f605bdbb3a6098bb76f666a95fc2b2f53f37fa1ecc89f1146f%40%3Cdevnull.infra.apache.org%3E mailing list
https://www.oracle.com/technetwork/security-advisory/cpuapr2019-5072813.html third party advisory patch
https://www.oracle.com/technetwork/security-advisory/cpujul2019-5072835.html
https://access.redhat.com/errata/RHSA-2019:3701 vendor advisory
https://cert-portal.siemens.com/productcert/pdf/ssa-936080.pdf

Frequently Asked Questions

What is the severity of CVE-2019-3823?
CVE-2019-3823 has been scored as a medium severity vulnerability.
How to fix CVE-2019-3823?
To fix CVE-2019-3823, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2019-3823 being actively exploited in the wild?
It is possible that CVE-2019-3823 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~1% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2019-3823?
CVE-2019-3823 affects The curl Project curl.
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