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 (5)
Core 5
Core References
Vendor Advisory x_refsource_confirm
http://www.oracle.com/technetwork/topics/security/linuxbulletinoct2015-2719645.html
Vendor Advisory vendor-advisory
x_refsource_ubuntu
http://www.ubuntu.com/usn/USN-2519-1
Patch x_refsource_confirm
https://sourceware.org/git/gitweb.cgi?p=glibc.git%3Ba=commit%3Bh=5bd80bfe9ca0d955bfbbc002781bc7b01b6bcb06
Third Party Advisory, VDB Entry vdb-entry
x_refsource_bid
http://www.securityfocus.com/bid/72499
Mailing List mailing-list
x_refsource_mlist
http://openwall.com/lists/oss-security/2015/02/04/1
Scores
EPSS
0.0045
EPSS Percentile
63.8%
Details
CWE
CWE-119
Status
published
Products (5)
canonical/ubuntu_linux
10.04
canonical/ubuntu_linux
12.04
canonical/ubuntu_linux
14.04
canonical/ubuntu_linux
14.10
gnu/glibc
< 2.20
Published
Apr 08, 2015
Tracked Since
Feb 18, 2026