Vulnerability · Published Aug 24, 2022 · Assigned by redhat
CVE-2021-3998
High 7.5
In plain English
A high-severity out-of-bounds read in glibc. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 2.2% (higher than 83% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS 3.1)7.5High
Exploit odds (30 days)2.2%top 17.4% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official 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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | glibc | 2.33-4 | DEBIAN-CVE-2021-3998 |
| Debian:13 | glibc | 2.33-4 | DEBIAN-CVE-2021-3998 |
| Debian:14 | glibc | 2.33-4 | DEBIAN-CVE-2021-3998 |
| Ubuntu:22.04:LTS | glibc | 2.35-0ubuntu1 | UBUNTU-CVE-2021-3998 |
Affected products (as reported)
Weakness: CWE-125 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
References
- https://www.openwall.com/lists/oss-security/2022/01/24/4
- https://sourceware.org/bugzilla/show_bug.cgi?id=28770
- https://sourceware.org/git/gitweb.cgi?p=glibc.git%3Bh=ee8d5e33adb284601c00c94687bc907e10aec9bb
- https://sourceware.org/git/gitweb.cgi?p=glibc.git%3Bh=84d2d0fe20bdf94feed82b21b4d7d136db471f03
- https://bugzilla.redhat.com/show_bug.cgi?id=2024633
- https://access.redhat.com/security/cve/CVE-2021-3998
- https://security-tracker.debian.org/tracker/CVE-2021-3998
- https://security.netapp.com/advisory/ntap-20221020-0003/
- https://cert-portal.siemens.com/productcert/html/ssa-831302.html
- https://cert-portal.siemens.com/productcert/html/ssa-398330.html