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almalinuxAlmaLinuxALSA-2023:5453
HistoryOct 05, 2023 - 12:00 a.m.

Important: glibc security update

2023-10-0500:00:00
errata.almalinux.org
63
glibc
security update
buffer overflow
ld.so
privilege escalation
cve-2023-4911
stack read overflow
getaddrinfo
no-aaaa mode
cve-2023-4527
use-after-free
getaddrinfo()
gaih_inet()
cvss score
references section

CVSS3

7.8

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS

0.016

Percentile

87.4%

The glibc packages provide the standard C libraries (libc), POSIX thread libraries (libpthread), standard math libraries (libm), and the name service cache daemon (nscd) used by multiple programs on the system. Without these libraries, the Linux system cannot function correctly.

Security Fix(es):

  • glibc: buffer overflow in ld.so leading to privilege escalation (CVE-2023-4911)
  • glibc: Stack read overflow in getaddrinfo in no-aaaa mode (CVE-2023-4527)
  • glibc: potential use-after-free in getaddrinfo() (CVE-2023-4806)
  • glibc: potential use-after-free in gaih_inet() (CVE-2023-4813)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

CVSS3

7.8

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS

0.016

Percentile

87.4%