CVE-2021-3999: Buffer Overflow
First published: Thu Nov 18 2021(Updated: )
A flaw was found in glibc. An off-by-one buffer overflow and underflow in getcwd() may lead to memory corruption when the size of the buffer is exactly 1. A local attacker who can control the input buffer and size passed to getcwd() in a setuid program could use this flaw to potentially execute arbitrary code and escalate their privileges on the system.
Credit: secalert@redhat.com secalert@redhat.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| GNU C Library | <2.31 | |
| Debian | =10.0 | |
| Debian | =11.0 | |
| netapp e-series performance analyzer | ||
| NetApp NFS Plug-in for VMware VAAI | ||
| NetApp ONTAP Select Deploy | ||
| netapp h300s firmware | ||
| netapp h300s | ||
| NetApp H500S Firmware | ||
| netapp h500s | ||
| netapp h700s firmware | ||
| netapp h700s | ||
| netapp h410s firmware | ||
| netapp h410s | ||
| netapp h410c firmware | ||
| netapp h410c | ||
| All of | ||
| netapp h300s firmware | ||
| netapp h300s | ||
| All of | ||
| NetApp H500S Firmware | ||
| netapp h500s | ||
| All of | ||
| netapp h700s firmware | ||
| netapp h700s | ||
| All of | ||
| netapp h410s firmware | ||
| netapp h410s | ||
| All of | ||
| netapp h410c firmware | ||
| netapp h410c | ||
| debian/glibc | 2.31-13+deb11u11 2.31-13+deb11u10 2.36-9+deb12u9 2.36-9+deb12u7 2.40-7 |
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Reference Links
- https://access.redhat.com/security/cve/CVE-2021-3999
- https://bugzilla.redhat.com/show_bug.cgi?id=2024637
- https://lists.debian.org/debian-lts-announce/2022/10/msg00021.html
- https://security-tracker.debian.org/tracker/CVE-2021-3999
- https://security.netapp.com/advisory/ntap-20221104-0001/
- https://sourceware.org/bugzilla/show_bug.cgi?id=28769
- https://sourceware.org/git/gitweb.cgi?p=glibc.git%3Bh=23e0e8f5f1fb5ed150253d986ecccdc90c2dcd5e
- https://www.openwall.com/lists/oss-security/2022/01/24/4
- https://launchpad.net/bugs/cve/CVE-2021-3999
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=2039676
- https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=23e0e8f5f1fb5ed150253d986ecccdc90c2dcd5e
- https://access.redhat.com/errata/RHSA-2022:0896
- https://access.redhat.com/security/cve/cve-2021-3999
- https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=472e799a5f2102bc0c3206dbd5a801765fceb39c
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-3999
- https://nvd.nist.gov/vuln/detail/CVE-2021-3999
- https://ubuntu.com/security/CVE-2021-3999
Frequently Asked Questions
What is CVE-2021-3999?
CVE-2021-3999 is a vulnerability in glibc that allows for an off-by-one buffer overflow and underflow in getcwd(), leading to potential memory corruption and arbitrary code execution.
What is the severity of CVE-2021-3999?
CVE-2021-3999 has a severity rating of 7.8 (High).
How does CVE-2021-3999 affect glibc?
CVE-2021-3999 affects glibc versions 2.28-10+deb10u2, 2.31-13+deb11u6, 2.31-13+deb11u7, 2.36-9+deb12u2, 2.36-9+deb12u3, and 2.37-12.
What is the remedy for CVE-2021-3999 on Debian Debian Linux 10.0?
CVE-2021-3999 can be fixed on Debian Debian Linux 10.0 by updating glibc to version 2.31 or higher.
Are Netapp E-series Performance Analyzer and Netapp Nfs Plug-in affected by CVE-2021-3999?
Yes, Netapp E-series Performance Analyzer and Netapp Nfs Plug-in are affected by CVE-2021-3999.
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