Bug 1168425 (CVE-2020-6096)

Summary:	VUL-0: CVE-2020-6096: glibc: exploitable signed comparison in the ARMv7 memcpy() implementation of GNU glibc
Product:	[Novell Products] SUSE Security Incidents	Reporter:	Wolfgang Frisch <wolfgang.frisch>
Component:	Incidents	Assignee:	Security Team bot <security-team>
Status:	RESOLVED INVALID	QA Contact:	Security Team bot <security-team>
Severity:	Minor
Priority:	P5 - None	CC:	smash_bz
Version:	unspecified
Target Milestone:	---
Hardware:	Other
OS:	Other
URL:	https://smash.suse.de/issue/256378/
Whiteboard:
Found By:	Security Response Team	Services Priority:
Business Priority:		Blocker:	---
Marketing QA Status:	---	IT Deployment:	---

Description Wolfgang Frisch 2020-04-02 10:08:20 UTC

CVE-2020-6096

An exploitable signed comparison vulnerability exists in the ARMv7 memcpy()
implementation of GNU glibc 2.30.9000. Calling memcpy() (on ARMv7 targets that
utilize the GNU glibc implementation) with a negative value for the 'num'
parameter results in a signed comparison vulnerability. If an attacker
underflows the 'num' parameter to memcpy(), this vulnerability could lead to
undefined behavior such as writing to out-of-bounds memory and potentially
remote code execution. Furthermore, this memcpy() implementation allows for
program execution to continue in scenarios where a segmentation fault or crash
should have occurred. The dangers occur in that subsequent execution and
iterations of this code will be executed with this corrupted data.

References:
http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2020-6096
http://people.canonical.com/~ubuntu-security/cve/2020/CVE-2020-6096.html
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-6096
https://sourceware.org/bugzilla/show_bug.cgi?id=25620

Comment 1 Wolfgang Frisch 2020-04-02 10:09:04 UTC

We don't support ARMv7.