USN-5310-1: GNU C Library vulnerabilities
1 March 2022
Several security issues were fixed in GNU C Library.
Releases
Packages
- glibc - GNU C Library
Details
Jan Engelhardt, Tavis Ormandy, and others discovered that the GNU C Library
iconv feature incorrectly handled certain input sequences. An attacker
could possibly use this issue to cause the GNU C Library to hang or crash,
resulting in a denial of service. This issue only affected Ubuntu 18.04 LTS
and Ubuntu 20.04 LTS. (CVE-2016-10228, CVE-2019-25013, CVE-2020-27618,
CVE-2020-29562, CVE-2021-3326)
Jason Royes and Samuel Dytrych discovered that the GNU C Library
incorrectly handled signed comparisons on ARMv7 targets. A remote attacker
could use this issue to cause the GNU C Library to crash, resulting in a
denial of service, or possibly execute arbitrary code. This issue only
affected Ubuntu 18.04 LTS and Ubuntu 20.04 LTS. (CVE-2020-6096)
It was discovered that the GNU C Library nscd daemon incorrectly handled
certain netgroup lookups. An attacker could possibly use this issue to
cause the GNU C Library to crash, resulting in a denial of service. This
issue only affected Ubuntu 20.04 LTS. (CVE-2021-27645)
It was discovered that the GNU C Library wordexp function incorrectly
handled certain patterns. An attacker could use this issue to cause the
GNU C Library to crash, resulting in a denial of service, or possibly
obtain sensitive information. This issue only affected Ubuntu 18.04 LTS and
Ubuntu 20.04 LTS. (CVE-2021-35942)
It was discovered that the GNU C Library realpath function incorrectly
handled return values. An attacker could possibly use this issue to obtain
sensitive information. This issue only affected Ubuntu 21.10.
(CVE-2021-3998)
It was discovered that the GNU C library getcwd function incorrectly
handled buffers. An attacker could use this issue to cause the GNU C
Library to crash, resulting in a denial of service, or possibly execute
arbitrary code. (CVE-2021-3999)
It was discovered that the GNU C Library sunrpc module incorrectly handled
buffer lengths. An attacker could possibly use this issue to cause the GNU
C Library to crash, resulting in a denial of service. (CVE-2022-23218,
CVE-2022-23219)
Update instructions
The problem can be corrected by updating your system to the following package versions:
Ubuntu 21.10
Ubuntu 20.04
Ubuntu 18.04
After a standard system update you need to reboot your computer to make
all the necessary changes.
Related notices
- USN-5310-2: libc6-amd64, glibc, libc6, nscd, libc6-dev-i386, libc6-pic, libc6-dev, glibc-doc, libc-dev-bin, libc6-dev-amd64, libc6-x32, libc6-armel, libc6-i386, libc-bin, locales-all, libc6-dev-armel, locales, libc6-s390, glibc-source, libc6-dev-x32, libc6-dev-s390, multiarch-support
- USN-6762-1: libc6-amd64, glibc, libc6, nscd, libc6-dev-i386, libc6-pic, libc6-dev, glibc-doc, libc-dev-bin, libc6-dev-amd64, libc6-x32, libc6-armel, libc6-i386, eglibc, eglibc-source, libc6-lse, libc-bin, locales-all, libc6-dev-armel, locales, libc6-s390, glibc-source, libc6-dev-x32, libc6-dev-s390, multiarch-support, libc6-prof
- USN-5699-1: libc6-amd64, glibc, libc6, nscd, libc6-dev-i386, libc6-pic, libc6-dev, glibc-doc, libc-dev-bin, libc6-dev-amd64, libc6-x32, libc6-armel, libc6-i386, libc-bin, locales-all, libc6-dev-armel, locales, libc6-s390, glibc-source, libc6-dev-x32, libc6-dev-s390, multiarch-support
- USN-5768-1: libc6-amd64, glibc, libc6, nscd, libc6-dev-i386, libc6-pic, libc6-dev, glibc-doc, libc-dev-bin, libc6-dev-amd64, libc6-x32, libc6-armel, libc6-i386, libc-bin, locales-all, libc6-dev-armel, locales, libc6-s390, glibc-source, libc6-dev-x32, libc6-dev-s390, multiarch-support
- USN-4954-1: libc6-amd64, glibc, libc6, nscd, libc6-dev-i386, libc6-udeb, libc6-dev-ppc64, libc6-pic, libc6-dev, libc6-ppc64, glibc-doc, libc-dev-bin, libc6-dev-amd64, libc6-x32, libc6-armel, libc6-i386, libc-bin, locales-all, libc6-dev-armel, locales, libc6-s390, glibc-source, libc6-dev-x32, libc6-dev-s390, multiarch-support