Detections
Analytics
Amazon Linux AMI : glibc (ALAS-2021-1511)
low Nessus Plugin ID 151518
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Synopsis
The remote Amazon Linux AMI host is missing a security update.Description
The version of glibc installed on the remote host is prior to 2.17-322.181. It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS-2021-1511 advisory.A vulnerability was discovered in glibc where the LD_PREFER_MAP_32BIT_EXEC environment variable is not ignored when running binaries with the setuid flag on x86_64 architectures. This allows an attacker to force system to utilize only half of the memory (making the system think the software is 32-bit only), thus lowering the amount of memory being used with address space layout randomization (ASLR). The highest threat is confidentiality although the complexity of attack is high. The affected application must already have other vulnerabilities for this flaw to be usable. (CVE-2019-19126)
A flaw was found in glibc. When processing input in the EUC-KR encoding, an invalid input sequence could cause glibc to read beyond the end of a buffer, resulting in a segmentation fault. The highest threat from this vulnerability is to system availability. (CVE-2019-25013)
A flaw was found in glibc in versions prior to 2.32. Pseudo-zero values are not validated causing a stack corruption due to a stack-based overflow. The highest threat from this vulnerability is to system availability. (CVE-2020-10029)
A stack buffer overflow flaw was found in glibc in the way the printf family of functions processed an 80-bit long double with a non-canonical bit pattern. This flaw allows an attacker who can control the arguments of these functions with the non-standard long double pattern to trigger an overflow and cause an application crash. The highest threat from this vulnerability is to system availability. (CVE-2020-29573)
Tenable has extracted the preceding description block directly from the tested product security advisory.
Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.
Solution
Run 'yum update glibc' to update your system.See Also
https://alas.aws.amazon.com/ALAS-2021-1511.html
https://access.redhat.com/security/cve/CVE-2019-19126
https://access.redhat.com/security/cve/CVE-2019-25013
Plugin Details
Severity: Low
ID: 151518
File Name: ala_ALAS-2021-1511.nasl
Version: 1.4
Type: local
Agent: unix
Published: 7/13/2021
Updated: 12/11/2024
Supported Sensors: Agentless Assessment, Continuous Assessment, Frictionless Assessment Agent, Frictionless Assessment AWS, Nessus Agent, Nessus
Risk Information
VPR
Risk Factor: Medium
Score: 4.4
CVSS v2
Risk Factor: Low
Base Score: 2.1
Temporal Score: 1.6
Vector: CVSS2#AV:L/AC:L/Au:N/C:P/I:N/A:N
CVSS Score Source: CVE-2019-19126
CVSS v3
Risk Factor: Low
Base Score: 3.3
Temporal Score: 3
Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
Temporal Vector: CVSS:3.0/E:P/RL:O/RC:C
Vulnerability Information
CPE: p-cpe:/a:amazon:linux:glibc-static, p-cpe:/a:amazon:linux:glibc-devel, p-cpe:/a:amazon:linux:glibc-common, p-cpe:/a:amazon:linux:glibc, p-cpe:/a:amazon:linux:glibc-utils, p-cpe:/a:amazon:linux:glibc-debuginfo, p-cpe:/a:amazon:linux:glibc-headers, p-cpe:/a:amazon:linux:glibc-debuginfo-common, cpe:/o:amazon:linux, p-cpe:/a:amazon:linux:nscd
Required KB Items: Host/local_checks_enabled, Host/AmazonLinux/release, Host/AmazonLinux/rpm-list
Exploit Available: true
Exploit Ease: Exploits are available
Patch Publication Date: 7/8/2021
Vulnerability Publication Date: 11/19/2019
Reference Information
CVE: CVE-2019-19126, CVE-2019-25013, CVE-2020-10029, CVE-2020-29573
ALAS: 2021-1511