Bug 2235542 (CVE-2020-22218)

Summary:	CVE-2020-22218 libssh2: use-of-uninitialized-value in _libssh2_transport_read
Product:	[Other] Security Response	Reporter:	Anten Skrabec <askrabec>
Component:	vulnerability	Assignee:	Product Security <prodsec-ir-bot>
Status:	NEW ---	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	bdettelb, caswilli, fjansen, jburrell, kaycoth, kdudka
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	libssh2 1.10.0, libssh2 1.11.0	Doc Type:	If docs needed, set a value
Doc Text:	A flaw was found in the libssh2 library. An out-of-bounds access issue can occur due to an improper initialization of a variable, resulting in a crash in the application linked to the library.	Story Points:	---
Clone Of:		Environment:
Last Closed:		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:	2235808, 2236038, 2236039, 2236040
Bug Blocks:	2235543

Description Anten Skrabec 2023-08-29 01:00:25 UTC

An issue was discovered in function _libssh2_packet_add in libssh2 1.10.0 allows attackers to access out of bounds memory.

Reference:
https://github.com/libssh2/libssh2/issues/477

Upstream patch:
https://github.com/libssh2/libssh2/commit/642eec48ff3adfdb7a9e562b6d7fc865d1733f45

Comment 2 TEJ RATHI 2023-08-30 08:00:23 UTC

Created libssh2 tracking bugs for this issue:

Affects: epel-all [bug 2236038]
Affects: fedora-all [bug 2236040]


Created mingw-libssh2 tracking bugs for this issue:

Affects: fedora-all [bug 2236039]

Comment 4 errata-xmlrpc 2023-10-10 16:13:21 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2023:5615 https://access.redhat.com/errata/RHSA-2023:5615