CVE-2021-3998
HIGHCVSS 7.5/10EPSS 1.44%
Last modified
CVE-2021-3998 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. A flaw was found in glibc. The realpath() function can mistakenly return an unexpected value, potentially leading to information leakage and disclosure of sensitive data.. EPSS estimates a 1.44% chance of exploitation in the next 30 days.
Description
A flaw was found in glibc. The realpath() function can mistakenly return an unexpected value, potentially leading to information leakage and disclosure of sensitive data.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Gnu | Glibc | >= 2.33, < 2.35 |
| Netapp | Ontap Select Deploy Administration Utility | All versions |
| Netapp | H300s Firmware | All versions |
| Netapp | H500s Firmware | All versions |
| Netapp | H700s Firmware | All versions |
| Netapp | H410s Firmware | All versions |
| Netapp | H410c Firmware | All versions |
References
- https://access.redhat.com/security/cve/CVE-2021-3998Third Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2024633Issue Tracking, Patch, Third Party Advisory
- https://security-tracker.debian.org/tracker/CVE-2021-3998Third Party Advisory
- https://security.netapp.com/advisory/ntap-20221020-0003/Third Party Advisory
- https://sourceware.org/bugzilla/show_bug.cgi?id=28770Issue Tracking, Patch, Third Party Advisory
- https://www.openwall.com/lists/oss-security/2022/01/24/4Mailing List, Patch, Third Party Advisory
- https://access.redhat.com/security/cve/CVE-2021-3998Third Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2024633Issue Tracking, Patch, Third Party Advisory
- https://security-tracker.debian.org/tracker/CVE-2021-3998Third Party Advisory
- https://security.netapp.com/advisory/ntap-20221020-0003/Third Party Advisory
- https://sourceware.org/bugzilla/show_bug.cgi?id=28770Issue Tracking, Patch, Third Party Advisory
- https://www.openwall.com/lists/oss-security/2022/01/24/4Mailing List, Patch, Third Party Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2021-3998?
A flaw was found in glibc. The realpath() function can mistakenly return an unexpected value, potentially leading to information leakage and disclosure of sensitive data.
How severe is CVE-2021-3998?
CVE-2021-3998 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 1.44% probability of exploitation in the next 30 days.
How do I fix CVE-2021-3998?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
Related CVEs from 2021
- CVE-2021-39974There is an Out-of-bounds read in Smartphones.Successful exp…7.5
- CVE-2021-39975Hilinksvc has a Data Processing Errors vulnerability.Success…7.5
- CVE-2021-39976There is a privilege escalation vulnerability in CloudEngine…7.8
- CVE-2021-39977The HwNearbyMain module has a NULL Pointer Dereference vulne…7.5
- CVE-2021-39978Telephony application has a SQL Injection vulnerability.Succ…7.5
- CVE-2021-39979HHEE system has a Code Injection vulnerability.Successful ex…9.8
- CVE-2021-39980Telephony application has a Exposure of Sensitive Informatio…5.3
- CVE-2021-39981Chang Lian application has a vulnerability which can be mali…5.3
- CVE-2021-39982Phone Manager application has a Improper Privilege Managemen…9.1
- CVE-2021-39983The HwNearbyMain module has a Data Processing Errors vulnera…7.5
- CVE-2021-39984Huawei idap module has a Out-of-bounds Read vulnerability.Su…7.5
- CVE-2021-39985The HwNearbyMain module has a Improper Validation of Array I…7.5
Are you affected by CVE-2021-3998?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST