Bug 1797072 (CVE-2019-20387)

Summary:	CVE-2019-20387 libsolv: out-of-bounds read in repodata_schema2id in repodata.c
Product:	[Other] Security Response	Reporter:	Guilherme de Almeida Suckevicz <gsuckevi>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED ERRATA	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	bbuckingham, bcourt, bkearney, btotty, dmach, ehelms, ggainey, gtanzill, hhudgeon, igor.raits, jmracek, jrohel, juwatts, lzap, mcermak, mhulan, mmccune, mminar, ngompa13, nmoumoul, pcreech, pkratoch, rbiba, rchan, rjerrido, rpm-software-management, smallamp, sokeeffe, sskracic
Target Milestone:	---	Keywords:	Reopened, Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	libsolv 0.7.6	Doc Type:	If docs needed, set a value
Doc Text:	An out-of-bounds read was discovered in Libsolv when the last schema has a length that is less than the length of the input schema. A remote attacker may abuse this flaw to crash an application that uses Libsolv.	Story Points:	---
Clone Of:		Environment:
Last Closed:	2020-11-04 02:24:08 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:	1802069, 1802070, 1802071, 1807939
Bug Blocks:	1797073

Description Guilherme de Almeida Suckevicz 2020-01-31 20:24:05 UTC

repodata_schema2id in repodata.c in libsolv before 0.7.6 has a heap-based buffer over-read via a last schema whose length is less than the length of the input schema.

Reference and upstream commit:
https://github.com/openSUSE/libsolv/commit/fdb9c9c03508990e4583046b590c30d958f272da

Comment 3 errata-xmlrpc 2020-11-04 01:34:45 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2020:4508 https://access.redhat.com/errata/RHSA-2020:4508

Comment 4 Product Security DevOps Team 2020-11-04 02:24:08 UTC

This bug is now closed. Further updates for individual products will be reflected on the CVE page(s):

https://access.redhat.com/security/cve/cve-2019-20387