CVE Vulnerability

CVE-2020-29573

sysdeps/i386/ldbl2mpn.c in the GNU C Library (aka glibc or libc6) before 2.23 on x86 targets has a stack-based buffer overflow if the input to any of the printf family of functions is an 80-bit long double with a non-canonical bit pattern, as seen when passing a x00x04x00x00x00x00x00x00x00x04 value to sprintf. NOTE: the issue does not affect glibc by default in 2016 or later (i.e., 2.23 or later) because of commits made in 2015 for inlining of C99 math functions through use of GCC built-ins. In other words, the reference to 2.23 is intentional despite the mention of "Fixed for glibc 2.33" in the 26649 reference.

5 /10

CVSS v2.0 :

V3 Legend

Vector :

Exploitability : 10 / Impact : 2.9

Attack Vector

Attack Complexity

Privileges Required

User Interaction

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact PARTIAL

Scope

7.5 /10

CVSS v3.0 : HIGH

V3 Legend

Vector :

Exploitability : 3.9 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References
Link Resource
https://sourceware.org/bugzilla/show_bug.cgi?id=26649 Issue Tracking Patch
https://sourceware.org/pipermail/libc-alpha/2020-September/117779.html Patch Third Party Advisory
https://security.gentoo.org/glsa/202101-20
https://security.netapp.com/advisory/ntap-20210122-0004/
Configurations

Configuration 1

cpe:2.3:a:gnu:glibc:*:*:*:*:*:*:x86:*
cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:*
Information

Published : 2020-12-06 12:15

Updated : 2021-01-26 06:15

NVD link : CVE-2020-29573

Mitre link : CVE-2020-29573

Products Affected
No products.
CWE
CWE-787