Bug 2218757 (CVE-2023-35862)

Summary:	CVE-2023-35862 libcoap: buffer over-read via coap_parse_oscore_conf_mem() at coap_oscore.c
Product:	[Other] Security Response	Reporter:	TEJ RATHI <trathi>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED UPSTREAM	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	Keywords:	Security
Target Milestone:	---
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	If docs needed, set a value
Doc Text:	A vulnerability was discovered in libcoap, caused by a global-buffer-overflow in coap_parse_oscore_conf_mem() function in src/coap_oscore.c. By persuading a victim to open a specially crafted file, a remote attacker could exploit this vulnerability to cause the application to crash.	Story Points:	---
Clone Of:		Environment:
Last Closed:	2023-07-04 07:02:33 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:	2218758
Bug Blocks:

Description TEJ RATHI 2023-06-30 06:22:00 UTC

libcoap 4.3.1 contains a buffer over-read via the function coap_parse_oscore_conf_mem at coap_oscore.c.

https://github.com/obgm/libcoap/tags
https://github.com/obgm/libcoap/issues/1117
https://github.com/obgm/libcoap/pull/1118

Comment 1 TEJ RATHI 2023-06-30 06:22:18 UTC

Created libcoap tracking bugs for this issue:

Affects: fedora-all [bug 2218758]

Comment 2 Product Security DevOps Team 2023-07-04 07:02:31 UTC

This CVE Bugzilla entry is for community support informational purposes only as it does not affect a package in a commercially supported Red Hat product. Refer to the dependent bugs for status of those individual community products.