Bug 1158631 – VUL-0: CVE-2019-19333: libyang: stack-based buffer overflow in make_canonical when bits leaf type is used

Bug 1158631 - (CVE-2019-19333) VUL-0: CVE-2019-19333: libyang: stack-based buffer overflow in make_canonical when bits leaf type is used

(CVE-2019-19333)
Summary:	VUL-0: CVE-2019-19333: libyang: stack-based buffer overflow in make_canonical...

Status:	IN_PROGRESS

Classification:	openSUSE
Product:	openSUSE Distribution
Classification:	openSUSE
Component:	Security
Version:	Leap 15.1
Hardware:	Other Other

Priority:	P3 - Medium Severity: Normal (vote)
Target Milestone:	---
Assigned To:	Martin Hauke
QA Contact:	Security Team bot

URL:	https://smash.suse.de/issue/248485/
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Reported:	2019-12-06 08:52 UTC by Robert Frohl
Modified:	2020-01-12 21:54 UTC (History)
CC List:	0 users

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Found By:	Security Response Team
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Description Robert Frohl 2019-12-06 08:52:08 UTC

rh#1779573

libyang up to version 1 release 4 has a stack-based buffer overflow in function make_canonical() in parser.c, when dealing with "bits" types with a name longer than 511 bytes. An application that uses libyang to validate untrusted YANG files could be vulnerable to this flaw, which could be used by an attacker to cause a denial of service or possibly gain code execution.

References:
https://bugzilla.redhat.com/show_bug.cgi?id=1779573
http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2019-19333

Comment 1 Robert Frohl 2019-12-06 08:52:46 UTC

only affects openSUSE:Factory

Comment 2 Martin Hauke 2020-01-12 21:54:00 UTC

The issue was fixed with SR#755393
https://build.opensuse.org/request/show/755393