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ALSA-2021:4358 — Moderate: glibc security, bug fix, and enhancement update

Affected: AlmaLinux:8: compat-libpthread-nonshared, AlmaLinux:8: glibc-benchtests, AlmaLinux:8: glibc-nss-devel, AlmaLinux:8: glibc-static, AlmaLinux:8: glibc-utils, AlmaLinux:8: nss_hesiod

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: Arbitrary read in wordexp() (CVE-2021-35942)

* glibc: Use-after-free in addgetnetgrentX function in netgroupcache.c (CVE-2021-27645)

* glibc: mq_notify does not handle separately allocated thread attributes (CVE-2021-33574)

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.

Additional Changes:

For detailed information on changes in this release, see the AlmaLinux Release Notes linked from the References section.

bdu:2022-05689

Withdrawn: BELL-CVE-2021-27645 — CVE-2021-27645 does not affect BellSoft software

Withdrawn by the publisher.

certfr-2023-avi-0453 — De multiples vulnérabilités ont été découvertes dans les produits Siemens. Certaines d'entre elles permettent à un atta…

certfr-2023-avi-0453

cnvd-2021-14790

EUVD-2026-243437

fkie_cve-2021-27645

The nameserver caching daemon (nscd) in the GNU C Library (aka glibc or libc6) 2.29 through 2.33, when processing a request for netgroup lookup, may crash due to a double-free, potentially resulting in degraded service or Denial of Service on the local system. This is related to netgroupcache.c.

GHSA-2hpw-5cjm-953f

gsd-2021-27645

ICSA-23-166-10 — Siemens SIMATIC S7-1500 TM MFP BIOS

The iconv program in the GNU C Library (aka glibc or libc6) 2.31 and earlier, when invoked with multiple suffixes in the destination encoding (TRANSLATE or IGNORE) along with the -c option, enters an infinite loop when processing invalid multi-byte input sequences, leading to a denial of service. The iconv feature in the GNU C Library (aka glibc or libc6) through 2.32, when processing invalid multi-byte input sequences in the EUC-KR encoding, may have a buffer over-read. A use-after-free vulnerability introduced in glibc upstream version 2.14 was found in the way the tilde expansion was carried out. Directory paths containing an initial tilde followed by a valid username were affected by this issue. A local attacker could exploit this flaw by creating a specially crafted path that, when processed by the glob function, would potentially lead to arbitrary code execution. This was fixed in version 2.32. The GNU C Library (aka glibc or libc6) before 2.32 could overflow an on-stack buffer during range reduction if an input to an 80-bit long double function contains a non-canonical bit pattern, a seen when passing a 0x5d414141414141410000 value to sinl on x86 targets. This is related to sysdeps/ieee754/ldbl-96/e_rem_pio2l.c. The iconv function in the GNU C Library (aka glibc or libc6) 2.32 and earlier, when processing invalid multi-byte input sequences in IBM1364, IBM1371, IBM1388, IBM1390, and IBM1399 encodings, fails to advance the input state, which could lead to an infinite lo…

openSUSE-SU-2024:10792-1 — glibc-2.34-1.2 on GA media

glibc-2.34-1.2 on GA media

UBUNTU-CVE-2021-27645

Affected: Ubuntu:20.04:LTS: glibc

WID-SEC-W-2022-1750 — GNU libc: Schwachstelle ermöglicht Denial of Service

Ein entfernter, anonymer Angreifer kann eine Schwachstelle in GNU libc ausnutzen, um einen Denial of Service Angriff durchzuführen.