Amazon Linux AMI update for libarchive

1) UNIX symbolic link following

EUVDB-ID: #VU61394

Risk: Low

CVSSv4.0: 4 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2021-31566

CWE-ID: CWE-61 - UNIX Symbolic Link (Symlink) Following

Exploit availability: No

Description

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to a symlink following issue when extracting files from the archive. A local user can create a specially crafted symbolic link to a critical file on the system, place it into an archive and modify modes, times, access control lists, and flags of a file outside of the archive.

Mitigation

Update the affected packages:

aarch64:
    bsdtar-debuginfo-3.5.3-2.amzn2023.0.2.aarch64
    bsdcat-debuginfo-3.5.3-2.amzn2023.0.2.aarch64
    bsdcpio-debuginfo-3.5.3-2.amzn2023.0.2.aarch64
    libarchive-debuginfo-3.5.3-2.amzn2023.0.2.aarch64
    libarchive-debugsource-3.5.3-2.amzn2023.0.2.aarch64
    libarchive-3.5.3-2.amzn2023.0.2.aarch64
    bsdcpio-3.5.3-2.amzn2023.0.2.aarch64
    bsdtar-3.5.3-2.amzn2023.0.2.aarch64
    libarchive-devel-3.5.3-2.amzn2023.0.2.aarch64
    bsdcat-3.5.3-2.amzn2023.0.2.aarch64

src:
    libarchive-3.5.3-2.amzn2023.0.2.src

x86_64:
    bsdtar-debuginfo-3.5.3-2.amzn2023.0.2.x86_64
    bsdcat-debuginfo-3.5.3-2.amzn2023.0.2.x86_64
    bsdtar-3.5.3-2.amzn2023.0.2.x86_64
    libarchive-debugsource-3.5.3-2.amzn2023.0.2.x86_64
    bsdcat-3.5.3-2.amzn2023.0.2.x86_64
    bsdcpio-debuginfo-3.5.3-2.amzn2023.0.2.x86_64
    libarchive-3.5.3-2.amzn2023.0.2.x86_64
    libarchive-debuginfo-3.5.3-2.amzn2023.0.2.x86_64
    bsdcpio-3.5.3-2.amzn2023.0.2.x86_64
    libarchive-devel-3.5.3-2.amzn2023.0.2.x86_64

Vulnerable software versions

Amazon Linux AMI: All versions

libarchive: before 3.5.3-2

CPE2.3

• cpe:2.3:o:amazon_web_services:amazon_linux_ami:*:*:*:*:*:*:*:*
• cpe:2.3:o:amazon_web_services:libarchive:*:*:*:*:*:amazon_linux_ami:*:*

External links

https://alas.aws.amazon.com/AL2023/ALAS-2023-071.html

Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

2) Use-after-free

EUVDB-ID: #VU59459

Risk: Medium

CVSSv4.0: 4 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2021-36976

CWE-ID: CWE-416 - Use After Free

Exploit availability: No

Description

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

The vulnerability exists due to a use-after-free error in copy_string. A remote attacker can cause a denial of service condition on the target system.

Mitigation

Update the affected packages:

aarch64:
    bsdtar-debuginfo-3.5.3-2.amzn2023.0.2.aarch64
    bsdcat-debuginfo-3.5.3-2.amzn2023.0.2.aarch64
    bsdcpio-debuginfo-3.5.3-2.amzn2023.0.2.aarch64
    libarchive-debuginfo-3.5.3-2.amzn2023.0.2.aarch64
    libarchive-debugsource-3.5.3-2.amzn2023.0.2.aarch64
    libarchive-3.5.3-2.amzn2023.0.2.aarch64
    bsdcpio-3.5.3-2.amzn2023.0.2.aarch64
    bsdtar-3.5.3-2.amzn2023.0.2.aarch64
    libarchive-devel-3.5.3-2.amzn2023.0.2.aarch64
    bsdcat-3.5.3-2.amzn2023.0.2.aarch64

src:
    libarchive-3.5.3-2.amzn2023.0.2.src

x86_64:
    bsdtar-debuginfo-3.5.3-2.amzn2023.0.2.x86_64
    bsdcat-debuginfo-3.5.3-2.amzn2023.0.2.x86_64
    bsdtar-3.5.3-2.amzn2023.0.2.x86_64
    libarchive-debugsource-3.5.3-2.amzn2023.0.2.x86_64
    bsdcat-3.5.3-2.amzn2023.0.2.x86_64
    bsdcpio-debuginfo-3.5.3-2.amzn2023.0.2.x86_64
    libarchive-3.5.3-2.amzn2023.0.2.x86_64
    libarchive-debuginfo-3.5.3-2.amzn2023.0.2.x86_64
    bsdcpio-3.5.3-2.amzn2023.0.2.x86_64
    libarchive-devel-3.5.3-2.amzn2023.0.2.x86_64

Vulnerable software versions

Amazon Linux AMI: All versions

libarchive: before 3.5.3-2

CPE2.3

• cpe:2.3:o:amazon_web_services:amazon_linux_ami:*:*:*:*:*:*:*:*
• cpe:2.3:o:amazon_web_services:libarchive:*:*:*:*:*:amazon_linux_ami:*:*

External links

https://alas.aws.amazon.com/AL2023/ALAS-2023-071.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.

3) Out-of-bounds read

EUVDB-ID: #VU62030

Risk: Low

CVSSv4.0: 1 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2022-26280

CWE-ID: CWE-125 - Out-of-bounds read

Exploit availability: No

Description

The vulnerability allows a remote attacker to gain access to potentially sensitive information.

The vulnerability exists due to a boundary condition when processing ZIP files in zipx_lzma_alone_init. A remote attacker can create a specially crafted .zip archive, trick the victim into opening it, trigger out-of-bounds read error and read contents of memory on the system.

Mitigation

Update the affected packages:

aarch64:
    bsdtar-debuginfo-3.5.3-2.amzn2023.0.2.aarch64
    bsdcat-debuginfo-3.5.3-2.amzn2023.0.2.aarch64
    bsdcpio-debuginfo-3.5.3-2.amzn2023.0.2.aarch64
    libarchive-debuginfo-3.5.3-2.amzn2023.0.2.aarch64
    libarchive-debugsource-3.5.3-2.amzn2023.0.2.aarch64
    libarchive-3.5.3-2.amzn2023.0.2.aarch64
    bsdcpio-3.5.3-2.amzn2023.0.2.aarch64
    bsdtar-3.5.3-2.amzn2023.0.2.aarch64
    libarchive-devel-3.5.3-2.amzn2023.0.2.aarch64
    bsdcat-3.5.3-2.amzn2023.0.2.aarch64

src:
    libarchive-3.5.3-2.amzn2023.0.2.src

x86_64:
    bsdtar-debuginfo-3.5.3-2.amzn2023.0.2.x86_64
    bsdcat-debuginfo-3.5.3-2.amzn2023.0.2.x86_64
    bsdtar-3.5.3-2.amzn2023.0.2.x86_64
    libarchive-debugsource-3.5.3-2.amzn2023.0.2.x86_64
    bsdcat-3.5.3-2.amzn2023.0.2.x86_64
    bsdcpio-debuginfo-3.5.3-2.amzn2023.0.2.x86_64
    libarchive-3.5.3-2.amzn2023.0.2.x86_64
    libarchive-debuginfo-3.5.3-2.amzn2023.0.2.x86_64
    bsdcpio-3.5.3-2.amzn2023.0.2.x86_64
    libarchive-devel-3.5.3-2.amzn2023.0.2.x86_64

Vulnerable software versions

Amazon Linux AMI: All versions

libarchive: before 3.5.3-2

CPE2.3

• cpe:2.3:o:amazon_web_services:amazon_linux_ami:*:*:*:*:*:*:*:*
• cpe:2.3:o:amazon_web_services:libarchive:*:*:*:*:*:amazon_linux_ami:*:*

External links

https://alas.aws.amazon.com/AL2023/ALAS-2023-071.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.