CVE-2020-29573
glibc printf Stack-Based Buffer Overflow
Description
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 \x00\x04\x00\x00\x00\x00\x00\x00\x00\x04 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.
INFO
Published Date :
Dec. 6, 2020, 12:15 a.m.
Last Modified :
April 26, 2023, 7:09 p.m.
Source :
[email protected]
Remotely Exploitable :
Yes !
Impact Score :
3.6
Exploitability Score :
3.9
Public PoC/Exploit Available at Github
CVE-2020-29573 has a 1 public PoC/Exploit available at Github.
Go to the Public Exploits tab to see the list.
Affected Products
The following products are affected by CVE-2020-29573
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2020-29573.
| URL | Resource |
|---|---|
| https://security.gentoo.org/glsa/202101-20 | Third Party Advisory |
| https://security.netapp.com/advisory/ntap-20210122-0004/ | Third Party Advisory |
| https://sourceware.org/bugzilla/show_bug.cgi?id=26649 | Issue Tracking Patch Third Party Advisory |
| https://sourceware.org/pipermail/libc-alpha/2020-September/117779.html | Patch Third Party Advisory |
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Map Vulnerabilities into Different Layers of the Container Image
Python
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2020-29573 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2020-29573 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Modified by [email protected]
May. 14, 2024
Action Type Old Value New Value -
Modified Analysis by [email protected]
Apr. 26, 2023
Action Type Old Value New Value Changed Reference Type https://security.gentoo.org/glsa/202101-20 No Types Assigned https://security.gentoo.org/glsa/202101-20 Third Party Advisory Changed Reference Type https://security.netapp.com/advisory/ntap-20210122-0004/ No Types Assigned https://security.netapp.com/advisory/ntap-20210122-0004/ Third Party Advisory Added CPE Configuration OR *cpe:2.3:a:netapp:cloud_backup:-:*:*:*:*:*:*:* *cpe:2.3:h:netapp:solidfire_baseboard_management_controller:-:*:*:*:*:*:*:* -
CVE Modified by [email protected]
Jan. 26, 2021
Action Type Old Value New Value Added Reference https://security.gentoo.org/glsa/202101-20 [No Types Assigned] Added Reference https://security.netapp.com/advisory/ntap-20210122-0004/ [No Types Assigned] -
CVE Modified by [email protected]
Dec. 15, 2020
Action Type Old Value New Value Changed Description 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 \x00\x04\x00\x00\x00\x00\x00\x00\x00\x04 value to sprintf. 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 \x00\x04\x00\x00\x00\x00\x00\x00\x00\x04 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. -
Initial Analysis by [email protected]
Dec. 10, 2020
Action Type Old Value New Value Added CVSS V2 NIST (AV:N/AC:L/Au:N/C:N/I:N/A:P) Added CVSS V3.1 NIST AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Changed Reference Type https://sourceware.org/bugzilla/show_bug.cgi?id=26649 No Types Assigned https://sourceware.org/bugzilla/show_bug.cgi?id=26649 Issue Tracking, Patch, Third Party Advisory Changed Reference Type https://sourceware.org/pipermail/libc-alpha/2020-September/117779.html No Types Assigned https://sourceware.org/pipermail/libc-alpha/2020-September/117779.html Patch, Third Party Advisory Added CWE NIST CWE-787 Added CPE Configuration OR *cpe:2.3:a:gnu:glibc:*:*:*:*:*:*:x86:* versions up to (excluding) 2.23 Added CPE Configuration OR *cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:*
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2020-29573 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2020-29573
weaknesses.
Exploit Prediction
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.
0.17 }} 0.02%
score
0.52616
percentile