CVE-2020-29573

CWE-787 — Out-of-bounds WriteCWE-121 — Stack-based Buffer Overflow6 documents6 sources
Severity
7.5HIGH
EPSS
0.2%
top 63.06%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
2
GNU GlibcRedhat Enterprise Linux
Timeline
PublishedDec 6
Latest updateMay 24

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 buil…

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:HExploitability: 3.9 | Impact: 3.6

Affected Packages2 packages

▶NVDgnu/glibc< 2.23
▶Debianglibc< 2.23-1+3

Also affects: Enterprise Linux 7.0

Patches

Patch: sourceware.org ↗Patch: sourceware.org ↗Patch: sourceware.org ↗

🔴Vulnerability Details

3
GHSA
GHSA-x6gp-hg9r-wh46: sysdeps/i386/ldbl2mpn↗2022-05-24
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OSV
CVE-2020-29573: sysdeps/i386/ldbl2mpn↗2020-12-06
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CVEList
CVE-2020-29573: sysdeps/i386/ldbl2mpn↗2020-12-05
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📋Vendor Advisories

2
Red Hat
glibc: 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↗2020-09-22
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Debian
CVE-2020-29573: glibc - sysdeps/i386/ldbl2mpn.c in the GNU C Library (aka glibc or libc6) before 2.23 on...↗2020
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CVE-2020-29573 (HIGH CVSS 7.5) | sysdeps/i386/ldbl2mpn.c in the GNU | cvebase.io