CVE-2015-1473

high

Description

The ADDW macro in stdio-common/vfscanf.c in the GNU C Library (aka glibc or libc6) before 2.21 does not properly consider data-type size during a risk-management decision for use of the alloca function, which might allow context-dependent attackers to cause a denial of service (segmentation violation) or overwrite memory locations beyond the stack boundary via a long line containing wide characters that are improperly handled in a wscanf call.

References

https://sourceware.org/git/gitweb.cgi?p=glibc.git%3Ba=commit%3Bh=5bd80bfe9ca0d955bfbbc002781bc7b01b6bcb06

http://www.ubuntu.com/usn/USN-2519-1

http://www.securityfocus.com/bid/72499

http://www.oracle.com/technetwork/topics/security/linuxbulletinoct2015-2719645.html

http://openwall.com/lists/oss-security/2015/02/04/1

Details

Source: Mitre, NVD

Published: 2015-04-08

Risk Information

CVSS v2

Base Score: 6.4

Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:P/A:P

Severity: Medium

CVSS v3

Base Score: 7.5

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Severity: High