CVE-2021-3999

Summary

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.

Affected Software

Weaknesses

• CWE-193: CWE-193 - Off-by-one Error

ADP Enrichment

CVE Program Container

Additional References

• https://www.openwall.com/lists/oss-security/2022/01/24/4
• https://sourceware.org/bugzilla/show_bug.cgi?id=28769
• https://sourceware.org/git/gitweb.cgi?p=glibc.git%3Bh=23e0e8f5f1fb5ed150253d986ecccdc90c2dcd5e
• https://bugzilla.redhat.com/show_bug.cgi?id=2024637
• https://access.redhat.com/security/cve/CVE-2021-3999
• https://security-tracker.debian.org/tracker/CVE-2021-3999
• https://lists.debian.org/debian-lts-announce/2022/10/msg00021.html
• https://security.netapp.com/advisory/ntap-20221104-0001/

CISA ADP Vulnrichment

• SSVC:
• Exploitation: none
  • Automatable: no
  • Technical Impact: total

References

• https://www.openwall.com/lists/oss-security/2022/01/24/4
• https://sourceware.org/bugzilla/show_bug.cgi?id=28769
• https://sourceware.org/git/gitweb.cgi?p=glibc.git%3Bh=23e0e8f5f1fb5ed150253d986ecccdc90c2dcd5e
• https://bugzilla.redhat.com/show_bug.cgi?id=2024637
• https://access.redhat.com/security/cve/CVE-2021-3999
• https://security-tracker.debian.org/tracker/CVE-2021-3999
• https://lists.debian.org/debian-lts-announce/2022/10/msg00021.html
• https://security.netapp.com/advisory/ntap-20221104-0001/

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