CVE-2021-3998 — Out-of-bounds Read in Glibc

CWE-125 — Out-of-bounds ReadCWE-252 — Unchecked Return Value8 documents8 sources
Severity
7.5HIGHNVD
EPSS
0.2%
top 58.10%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
1
GNU Glibc
Timeline
PublishedAug 24
Latest updateAug 25

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.

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:NExploitability: 3.9 | Impact: 3.6

Affected Packages3 packages

▶NVDgnu/glibc2.33 — 2.35
▶Debiangnu/glibc< 2.33-4+2
▶CVEListV5gnu/glibcAffects glibc v2.33 and above.

Patches

Patch: bugzilla.redhat.com ↗Patch: sourceware.org ↗Patch: www.openwall.com ↗

🔴Vulnerability Details

3
GHSA
GHSA-32pr-wg5j-9rwr: A flaw was found in glibc↗2022-08-25
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OSV
CVE-2021-3998: A flaw was found in glibc↗2022-08-24
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CVEList
CVE-2021-3998: A flaw was found in glibc↗2022-08-24
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📋Vendor Advisories

4
Microsoft
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.↗2022-08-09
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Ubuntu
GNU C Library vulnerabilities↗2022-03-01
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Red Hat
glibc: Unexpected return value from realpath() could leak data based on the application↗2022-01-11
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Debian
CVE-2021-3998: glibc - A flaw was found in glibc. The realpath() function can mistakenly return an unex...↗2021
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CVE-2021-3998 — Out-of-bounds Read in GNU Glibc | cvebase