Amazon Linux AMI update for zlib

Published: 2024-08-06

Risk	High
Patch available	YES
Number of vulnerabilities	2
CVE-ID	CVE-2018-25032 CVE-2022-37434
CWE-ID	CWE-119 CWE-122
Exploitation vector	Network
Public exploit	Public exploit code for vulnerability #2 is available.
Vulnerable software Subscribe	Amazon Linux AMI Operating systems & Components / Operating system zlib Operating systems & Components / Operating system package or component
Vendor	Amazon Web Services

Security Bulletin

This security bulletin contains information about 2 vulnerabilities.

1) Buffer overflow

EUVDB-ID: #VU61671

Risk: Medium

CVSSv3.1: 4.6 [CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2018-25032

CWE-ID: CWE-119 - Memory corruption

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to insufficient validation of user-supplied input when compressing data. A remote attacker can pass specially crafted input to the application, trigger memory corruption and perform a denial of service (DoS) attack.

Mitigation

Update the affected packages:

aarch64:
    zlib-debugsource-1.2.11-33.amzn2023.0.4.aarch64
    minizip-compat-debuginfo-1.2.11-33.amzn2023.0.4.aarch64
    minizip-compat-1.2.11-33.amzn2023.0.4.aarch64
    minizip-compat-devel-1.2.11-33.amzn2023.0.4.aarch64
    zlib-debuginfo-1.2.11-33.amzn2023.0.4.aarch64
    zlib-devel-1.2.11-33.amzn2023.0.4.aarch64
    zlib-static-1.2.11-33.amzn2023.0.4.aarch64
    zlib-1.2.11-33.amzn2023.0.4.aarch64

src:
    zlib-1.2.11-33.amzn2023.0.4.src

x86_64:
    zlib-debugsource-1.2.11-33.amzn2023.0.4.x86_64
    minizip-compat-devel-1.2.11-33.amzn2023.0.4.x86_64
    zlib-static-1.2.11-33.amzn2023.0.4.x86_64
    zlib-1.2.11-33.amzn2023.0.4.x86_64
    zlib-debuginfo-1.2.11-33.amzn2023.0.4.x86_64
    minizip-compat-debuginfo-1.2.11-33.amzn2023.0.4.x86_64
    zlib-devel-1.2.11-33.amzn2023.0.4.x86_64
    minizip-compat-1.2.11-33.amzn2023.0.4.x86_64

Vulnerable software versions

Amazon Linux AMI: All versions

zlib: before 1.2.8-7.20

External links

http://alas.aws.amazon.com/AL2023/ALAS-2023-003.html

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.

2) Heap-based buffer overflow

EUVDB-ID: #VU66153

Risk: High

CVSSv3.1: 7.3 [CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C]

CVE-ID: CVE-2022-37434

CWE-ID: CWE-122 - Heap-based Buffer Overflow

Exploit availability: Yes

Description

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to a boundary error when processing a large gzip header within inflateGetHeader in inflate.c. A remote attacker can pass a specially crafted file to the affected application, trigger heap-based buffer overflow and execute arbitrary code on the target system.

Mitigation

Update the affected packages:

aarch64:
    zlib-debugsource-1.2.11-33.amzn2023.0.4.aarch64
    minizip-compat-debuginfo-1.2.11-33.amzn2023.0.4.aarch64
    minizip-compat-1.2.11-33.amzn2023.0.4.aarch64
    minizip-compat-devel-1.2.11-33.amzn2023.0.4.aarch64
    zlib-debuginfo-1.2.11-33.amzn2023.0.4.aarch64
    zlib-devel-1.2.11-33.amzn2023.0.4.aarch64
    zlib-static-1.2.11-33.amzn2023.0.4.aarch64
    zlib-1.2.11-33.amzn2023.0.4.aarch64

src:
    zlib-1.2.11-33.amzn2023.0.4.src

x86_64:
    zlib-debugsource-1.2.11-33.amzn2023.0.4.x86_64
    minizip-compat-devel-1.2.11-33.amzn2023.0.4.x86_64
    zlib-static-1.2.11-33.amzn2023.0.4.x86_64
    zlib-1.2.11-33.amzn2023.0.4.x86_64
    zlib-debuginfo-1.2.11-33.amzn2023.0.4.x86_64
    minizip-compat-debuginfo-1.2.11-33.amzn2023.0.4.x86_64
    zlib-devel-1.2.11-33.amzn2023.0.4.x86_64
    minizip-compat-1.2.11-33.amzn2023.0.4.x86_64

Vulnerable software versions

Amazon Linux AMI: All versions

zlib: before 1.2.8-7.20

External links

http://alas.aws.amazon.com/AL2023/ALAS-2023-003.html

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. However, proof of concept for this vulnerability is available.