Bug 1569233 (CVE-2018-9860)

Summary:	CVE-2018-9860 botan: off-by-one error when processing malformed TLS-CBC ciphertext
Product:	[Other] Security Response	Reporter:	Laura Pardo <lpardo>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED ERRATA	QA Contact:
Severity:	low	Docs Contact:
Priority:	low
Version:	unspecified	CC:	thomas.moschny
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	botan 2.6.0	Doc Type:	If docs needed, set a value
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2021-10-21 20:01:11 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:

Description Laura Pardo 2018-04-18 20:43:46 UTC

A flaw was found in Botan 1.11.32 through 2.x before 2.6.0. An off-by-one error when processing malformed TLS-CBC ciphertext could cause the receiving side to include in the HMAC computation exactly 64K bytes of data following the record buffer, aka an over-read. The MAC comparison will subsequently fail and the connection will be closed. This could be used for denial of service. No information leak occurs.


Reference:
https://botan.randombit.net/security.html

Comment 1 Thomas Moschny 2018-04-18 21:42:31 UTC

In the botan package, we only package stable 1.X versions up to and including 1.10.

The botan2 package contains stable 2.X versions. Moreover, 2.6.0 is already in rawhide, and in testing for F27 and F28.