Anolis OS update for multiple packages



Risk Medium
Patch available YES
Number of vulnerabilities 4
CVE-ID CVE-2023-40546
CVE-2023-40549
CVE-2023-40550
CVE-2023-40551
CWE-ID CWE-476
CWE-125
Exploitation vector Network
Public exploit N/A
Vulnerable software
 Anolis OS
Operating systems & Components / Operating system

shim-x64
Operating systems & Components / Operating system package or component

shim-unsigned-x64
Operating systems & Components / Operating system package or component

shim-unsigned-ia32
Operating systems & Components / Operating system package or component

shim-unsigned-aarch64
Operating systems & Components / Operating system package or component

shim-aa64
Operating systems & Components / Operating system package or component

Vendor OpenAnolis

Security Bulletin

This security bulletin contains information about 4 vulnerabilities.

1) NULL pointer dereference

EUVDB-ID: #VU86241

Risk: Medium

CVSSv4.0: 2.1 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2023-40546

CWE-ID: CWE-476 - NULL Pointer Dereference

Exploit availability: No

Description

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

The vulnerability exists due to a NULL pointer dereference error within the mirror_one_esl() function in mok.c while creating a new ESL variable. A remote attacker can pass specially crafted data to the application and perform a denial of service (DoS) attack.

Mitigation

Install updates from vendor's repository.

Vulnerable software versions

Anolis OS: 23

shim-x64: before 15.8-1

shim-unsigned-x64: before 15.8-1

shim-unsigned-ia32: before 15.8-1

shim-unsigned-aarch64: before 15.8-2

shim-aa64: before 15.8-1

CPE2.3 External links

https://anas.openanolis.cn/errata/detail/ANSA-2024:1127


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) Out-of-bounds read

EUVDB-ID: #VU86238

Risk: Medium

CVSSv4.0: 2.1 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2023-40549

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

Exploit availability: No

Description

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

The vulnerability exists due to a boundary condition within the verify_buffer_authenticode()  function when parsing PE binary. A remote attacker can pass a specially crafted PE binary to the loader, trigger an out-of-bounds read error and perform a denial of service (DoS) attack.

Mitigation

Install updates from vendor's repository.

Vulnerable software versions

Anolis OS: 23

shim-x64: before 15.8-1

shim-unsigned-x64: before 15.8-1

shim-unsigned-ia32: before 15.8-1

shim-unsigned-aarch64: before 15.8-2

shim-aa64: before 15.8-1

CPE2.3 External links

https://anas.openanolis.cn/errata/detail/ANSA-2024:1127


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: #VU86239

Risk: Medium

CVSSv4.0: 2.1 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2023-40550

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

Exploit availability: No

Description

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

The vulnerability exists due to a boundary condition within the verify_buffer_sbat() function. A remote attacker can trigger an out-of-bounds read error and perform a denial of service (DoS) attack.

Mitigation

Install updates from vendor's repository.

Vulnerable software versions

Anolis OS: 23

shim-x64: before 15.8-1

shim-unsigned-x64: before 15.8-1

shim-unsigned-ia32: before 15.8-1

shim-unsigned-aarch64: before 15.8-2

shim-aa64: before 15.8-1

CPE2.3 External links

https://anas.openanolis.cn/errata/detail/ANSA-2024:1127


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.

4) Out-of-bounds read

EUVDB-ID: #VU86240

Risk: Medium

CVSSv4.0: 2.1 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2023-40551

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

Exploit availability: No

Description

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

The vulnerability exists due to a boundary condition when parsing MZ binaries. A remote attacker can pass a specially crafted MZ binary to the application, trigger an out-of-bounds read error and perform a denial of service (DoS) attack.

Mitigation

Install updates from vendor's repository.

Vulnerable software versions

Anolis OS: 23

shim-x64: before 15.8-1

shim-unsigned-x64: before 15.8-1

shim-unsigned-ia32: before 15.8-1

shim-unsigned-aarch64: before 15.8-2

shim-aa64: before 15.8-1

CPE2.3 External links

https://anas.openanolis.cn/errata/detail/ANSA-2024:1127


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.



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