Security Bulletin
This security bulletin contains one high risk vulnerability.
EUVDB-ID: #VU54560
Risk: High
CVSSv3.1: 7.1 [CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]
CVE-ID: CVE-2021-33574
CWE-ID:
CWE-416 - Use After Free
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to compromise vulnerable system.
The vulnerability exists due to a use-after-free error in the mq_notify() function in the GNU C Library. A remote attacker can force the library to use the notification thread attributes object (passed through its struct
sigevent parameter) after it has been freed by the caller, leading to a
denial of service or possibly remote code execution.
Successful exploitation of the vulnerability may allow an attacker to compromise vulnerable system.
MitigationUpdate the affected package glibc to the latest version.
Vulnerable software versionsSUSE OpenStack Cloud Crowbar: 9
SUSE Linux Enterprise Software Development Kit: 12-SP5
SUSE Linux Enterprise Server for SAP: 12-SP4
SUSE Linux Enterprise Server: 12-SP4-LTSS - 12-SP5
SUSE OpenStack Cloud: 9
glibc-devel-static: before 2.22-114.15.1
glibc-info: before 2.22-114.15.1
glibc-i18ndata: before 2.22-114.15.1
glibc-html: before 2.22-114.15.1
nscd-debuginfo: before 2.22-114.15.1
nscd: before 2.22-114.15.1
glibc-profile-32bit: before 2.22-114.15.1
glibc-profile: before 2.22-114.15.1
glibc-locale-debuginfo-32bit: before 2.22-114.15.1
glibc-locale-debuginfo: before 2.22-114.15.1
glibc-locale-32bit: before 2.22-114.15.1
glibc-locale: before 2.22-114.15.1
glibc-devel-debuginfo-32bit: before 2.22-114.15.1
glibc-devel-debuginfo: before 2.22-114.15.1
glibc-devel-32bit: before 2.22-114.15.1
glibc-devel: before 2.22-114.15.1
glibc-debugsource: before 2.22-114.15.1
glibc-debuginfo-32bit: before 2.22-114.15.1
glibc-debuginfo: before 2.22-114.15.1
glibc-32bit: before 2.22-114.15.1
glibc: before 2.22-114.15.1
External linkshttp://www.suse.com/support/update/announcement/2021/suse-su-20213290-1/
Q & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.