Vulnerability 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.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Gnu | Glibc | < 2.23 |
| Redhat | Enterprise Linux | 7.0 |
| Netapp | Cloud Backup | - |
| Netapp | Solidfire Baseboard Management Controller | - |
Related Weaknesses (CWE)
References
- https://security.gentoo.org/glsa/202101-20Third Party Advisory
- https://security.netapp.com/advisory/ntap-20210122-0004/Third Party Advisory
- https://sourceware.org/bugzilla/show_bug.cgi?id=26649Issue TrackingPatchThird Party Advisory
- https://sourceware.org/pipermail/libc-alpha/2020-September/117779.htmlPatchThird Party Advisory
- https://security.gentoo.org/glsa/202101-20Third Party Advisory
- https://security.netapp.com/advisory/ntap-20210122-0004/Third Party Advisory
- https://sourceware.org/bugzilla/show_bug.cgi?id=26649Issue TrackingPatchThird Party Advisory
- https://sourceware.org/pipermail/libc-alpha/2020-September/117779.htmlPatchThird Party Advisory
FAQ
What is CVE-2020-29573?
CVE-2020-29573 is a vulnerability with a CVSS score of 7.5 (HIGH). 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 d...
How severe is CVE-2020-29573?
CVE-2020-29573 has been rated HIGH with a CVSS base score of 7.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2020-29573?
Check the references section above for vendor advisories and patch information. Affected products include: Gnu Glibc, Redhat Enterprise Linux, Netapp Cloud Backup, Netapp Solidfire Baseboard Management Controller.