Bug 719472 (CVE-2019-6488)

Summary:	<sys-libs/glibc-2.29: Possible denial of service (CVE-2019-6488)
Product:	Gentoo Security	Reporter:	GLSAMaker/CVETool Bot <glsamaker>
Component:	Vulnerabilities	Assignee:	Gentoo Security <security>
Status:	RESOLVED FIXED
Severity:	normal	CC:	toolchain
Priority:	Normal
Version:	unspecified
Hardware:	All
OS:	Linux
Whiteboard:	A3 [glsa+ cve]
Package list:		Runtime testing required:	---

Description GLSAMaker/CVETool Bot gentoo-dev

2020-04-26 01:17:23 UTC

CVE-2019-6488 (https://nvd.nist.gov/vuln/detail/CVE-2019-6488):
  The string component in the GNU C Library (aka glibc or libc6) through 2.28,
  when running on the x32 architecture, incorrectly attempts to use a 64-bit
  register for size_t in assembly codes, which can lead to a segmentation
  fault or possibly unspecified other impact, as demonstrated by a crash in
  __memmove_avx_unaligned_erms in
  sysdeps/x86_64/multiarch/memmove-vec-unaligned-erms.S during a memcpy.

Comment 1 Sam James archtester

2020-04-26 01:19:58 UTC

@maintainer(s), please let us know what patchset this was fixed in (if at all) for 2.28.

Comment 2 Sergei Trofimovich (RETIRED) gentoo-dev

2020-04-26 08:56:53 UTC

That is a https://sourceware.org/PR24097. I don't think gentoo has a fix in 2.28.

Does it matter? 2.28 is masked in gentoo.

Comment 3 Yury German Gentoo Infrastructure

2020-05-22 00:59:22 UTC

As per upstream:

__________________________

H.J. Lu 2019-01-22 03:52:25 UTC
Fixed for 2.29:

commit 5165de69c0908e28a380cbd4bb054e55ea4abc95
Author: H.J. Lu <hjl.tools@gmail.com>
Date:   Mon Jan 21 11:36:36 2019 -0800

    x86-64 strnlen/wcsnlen: Properly handle the length parameter [BZ# 24097]

_________________________________________________

2.29 has been masked in tree.
Added to an existing GLSA Request.

Comment 4 GLSAMaker/CVETool Bot gentoo-dev

2020-06-13 01:05:28 UTC

This issue was resolved and addressed in
 GLSA 202006-04 at https://security.gentoo.org/glsa/202006-04
by GLSA coordinator Aaron Bauman (b-man).