CVE-2020-29573

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Summary

CVECVE-2020-29573
StatePUBLIC
Assigner[email protected]
Source PriorityCVE Program / NVD first with legacy fallback
Published2020-12-06 00:15:00 UTC
Updated2023-04-26 19:09:00 UTC
Descriptionsysdeps/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.

Risk And Classification

Problem Types: CWE-787

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Application Gnu Glibc All All All All
Application Gnu Glibc All All All All
Application Netapp Cloud Backup - All All All
Hardware Netapp Solidfire Baseboard Management Controller - All All All
Operating System Redhat Enterprise Linux 7.0 All All All
Operating System Redhat Enterprise Linux 7.0 All All All

References

ReferenceSourceLinkTags
26649 – printf should handle non-normal x86 long double numbers gracefully MISC sourceware.org Issue Tracking, Patch, Third Party Advisory
glibc: Multiple vulnerabilities (GLSA 202101-20) — Gentoo security GENTOO security.gentoo.org
December 2020 GNU C Library Vulnerabilities in NetApp Products | NetApp Product Security CONFIRM security.netapp.com
[PATCH] x86: Harden printf against non-normal long double values (bug 26649) MISC sourceware.org Patch, Third Party Advisory
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Legacy QID Mappings

  • 174895 SUSE Enterprise Linux Security Update for glibc (SUSE-SU-2021:1165-1)
  • 239526 Red Hat Update for glibc (RHSA-2021:2998)
  • 352480 Amazon Linux Security Advisory for glibc: ALAS-2021-1511
  • 375781 F5 BIG-IP ASM,LTM,APM BIG-IP Glibc Vulnerability (K27238230)
  • 377268 Alibaba Cloud Linux Security Update for glibc (ALINUX2-SA-2021:0005)
  • 591406 Siemens SIMATIC S7-1500 CPU GNU/Linux subsystem Multiple Vulnerabilities (SSB-439005, ICSA-22-104-13)
  • 670738 EulerOS Security Update for glibc (EulerOS-SA-2021-2496)
  • 730228 McAfee Web Gateway Multiple Vulnerabilities (WP-3445, WP-3483, WP-3527, WP-3528, WP-3547, WP-3584,WP-3589,WP-3611)
  • 750341 OpenSUSE Security Update for glibc (openSUSE-SU-2021:0358-1)
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