Detections
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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.- On the x86-64 architecture, the GNU C Library (aka glibc) before 2.31 fails to ignore the LD_PREFER_MAP_32BIT_EXEC environment variable during program execution after a security transition, allowing local attackers to restrict the possible mapping addresses for loaded libraries and thus bypass ASLR for a setuid program. (CVE-2019-19126)
- 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. (CVE-2019-25013)
- 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. (CVE-2020-10029)
- sysdeps/i386/ldbl2mpn.c in the GNU C Library (aka glibc or libc6) before 2.23 on x86 targets has a stack- based buffer overflow if the input to any of the printf family of functions is an 80-bit long double with a non-canonical bit pattern, as seen when passing a \x00\x04\x00\x00\x00\x00\x00\x00\x00\x04 value to sprintf. NOTE: the issue does not affect glibc by default in 2016 or later (i.e., 2.23 or later) because of commits made in 2015 for inlining of C99 math functions through use of GCC built-ins. In other words, the reference to 2.23 is intentional despite the mention of Fixed for glibc 2.33 in the 26649 reference.
(CVE-2020-29573)
Note that Nessus has not tested for this issue 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: 1.3
Type: local
Agent: unix
Published: 7/13/2021
Updated: 12/8/2023
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