What is CVE-2019-5436?

CVE-2019-5436 is a high-severity software vulnerability (CWE-122) with a CVSS score of 7.8. A heap buffer overflow in the TFTP receiving code allows for DoS or arbitrary code execution in libcurl versions 7.19.4 through 7.64.1.

Is CVE-2019-5436 being actively exploited?

It is not currently in CISA's KEV catalog. Its EPSS exploitation probability is 50%.

What products does CVE-2019-5436 affect?

Tracked products affected include Fedora. Check the version you run to see whether it is affected.

How do I fix CVE-2019-5436?

Apply the vendor fix promptly. An official patch or advisory is available. Upgrade affected products to a fixed version.

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CVE-2019-5436

HIGH severity · CVSS 7.8 · CWE-122

7.8CVSS HIGH

Summary

A heap buffer overflow in the TFTP receiving code allows for DoS or arbitrary code execution in libcurl versions 7.19.4 through 7.64.1.

Impact & exploitability

Attack vectorLocal

Attack complexityLow

Privileges requiredLow

User interactionNone

Confidentiality impactHigh

Integrity impactHigh

Availability impactHigh

Exploit probability (EPSS)50%

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected products we track (1)

Fedora

Recommendation

Apply the vendor fix promptly. Open any affected product above for its exact safe version.

Official patch: http://www.openwall.com/lists/oss-security/2019/09/11/6 ↗

Additional information

NVD record
http://www.openwall.com/lists/oss-security/2019/09/11/6Patch
https://curl.haxx.se/docs/CVE-2019-5436.htmlPatch
http://lists.opensuse.org/opensuse-security-announce/2019-06/msg00008.htmlAdvisory
http://lists.opensuse.org/opensuse-security-announce/2019-06/msg00017.htmlAdvisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/SMG3V4VTX2SE3EW3HQTN3DDLQBTORQC2/
https://seclists.org/bugtraq/2020/Feb/36Advisory
https://security.gentoo.org/glsa/202003-29Advisory
https://security.netapp.com/advisory/ntap-20190606-0004/Advisory