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CVE-2015-8983

Published: 31 December 2015

Integer overflow in the _IO_wstr_overflow function in libio/wstrops.c in the GNU C Library (aka glibc or libc6) before 2.22 allows context-dependent attackers to cause a denial of service (application crash) or possibly execute arbitrary code via vectors related to computing a size in bytes, which triggers a heap-based buffer overflow.

From the Ubuntu Security Team

It was discovered that an integer overflow existed in the _IO_wstr_overflow() function of the GNU C Library. An attacker could use this to cause a denial of service or possibly execute arbitrary code.

Priority

Medium

Cvss 3 Severity Score

8.1

Score breakdown

Status

Package Release Status
eglibc
Launchpad, Ubuntu, Debian
precise
Released (2.15-0ubuntu10.16)
trusty
Released (2.19-0ubuntu6.10)
upstream Needs triage

yakkety Does not exist

zesty Does not exist

xenial Does not exist

glibc
Launchpad, Ubuntu, Debian
precise Does not exist

trusty Does not exist

upstream
Released (2.22)
xenial Not vulnerable
(2.23-0ubuntu3)
yakkety Not vulnerable
(2.23-0ubuntu3)
zesty Not vulnerable
(2.23-0ubuntu3)
Patches:
upstream: https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=bdf1ff052a8e23d637f2c838fa5642d78fcedc33

Severity score breakdown

Parameter Value
Base score 8.1
Attack vector Network
Attack complexity High
Privileges required None
User interaction None
Scope Unchanged
Confidentiality High
Integrity impact High
Availability impact High
Vector CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H