Amazon Linux AMI update for libxml2



Published: 2023-05-04
Risk High
Patch available YES
Number of vulnerabilities 13
CVE-ID CVE-2017-16931
CVE-2020-24977
CVE-2021-3516
CVE-2021-3517
CVE-2021-3518
CVE-2021-3537
CVE-2021-3541
CVE-2022-23308
CVE-2022-29824
CVE-2022-40303
CVE-2022-40304
CVE-2023-28484
CVE-2023-29469
CWE-ID CWE-119
CWE-125
CWE-416
CWE-787
CWE-476
CWE-20
CWE-190
CWE-399
Exploitation vector Network
Public exploit N/A
Vulnerable software
Subscribe 		Amazon Linux AMI
Operating systems & Components / Operating system

libxml2
Operating systems & Components / Operating system package or component

Vendor Amazon Web Services

Security Bulletin

This security bulletin contains information about 13 vulnerabilities.

1) Buffer overflow

EUVDB-ID: #VU32048

Risk: High

CVSSv3.1: 8.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2017-16931

CWE-ID: CWE-119 - Memory corruption

Exploit availability: No

Description

The vulnerability allows a remote non-authenticated attacker to execute arbitrary code.

parser.c in libxml2 before 2.9.5 mishandles parameter-entity references because the NEXTL macro calls the xmlParserHandlePEReference function in the case of a '%' character in a DTD name.

Mitigation

Update the affected packages:

i686:
    libxml2-python27-2.9.1-6.6.42.amzn1.i686
    libxml2-debuginfo-2.9.1-6.6.42.amzn1.i686
    libxml2-2.9.1-6.6.42.amzn1.i686
    libxml2-devel-2.9.1-6.6.42.amzn1.i686
    libxml2-python26-2.9.1-6.6.42.amzn1.i686
    libxml2-static-2.9.1-6.6.42.amzn1.i686

src:
    libxml2-2.9.1-6.6.42.amzn1.src

x86_64:
    libxml2-2.9.1-6.6.42.amzn1.x86_64
    libxml2-debuginfo-2.9.1-6.6.42.amzn1.x86_64
    libxml2-static-2.9.1-6.6.42.amzn1.x86_64
    libxml2-devel-2.9.1-6.6.42.amzn1.x86_64
    libxml2-python26-2.9.1-6.6.42.amzn1.x86_64
    libxml2-python27-2.9.1-6.6.42.amzn1.x86_64

Vulnerable software versions

Amazon Linux AMI: All versions

libxml2: before 2.9.1-6.6.42

External links

http://alas.aws.amazon.com/ALAS-2023-1743.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) Out-of-bounds read

EUVDB-ID: #VU46737

Risk: Medium

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

CVE-ID: CVE-2020-24977

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 within the xmlEncodeEntitiesInternal() function in libxml2/entities.c in libxml2. A remote attacker can pas specially crafted XML data to the affected application, trigger out-of-bounds read error and read contents of memory on the system.

Mitigation

Update the affected packages:

i686:
    libxml2-python27-2.9.1-6.6.42.amzn1.i686
    libxml2-debuginfo-2.9.1-6.6.42.amzn1.i686
    libxml2-2.9.1-6.6.42.amzn1.i686
    libxml2-devel-2.9.1-6.6.42.amzn1.i686
    libxml2-python26-2.9.1-6.6.42.amzn1.i686
    libxml2-static-2.9.1-6.6.42.amzn1.i686

src:
    libxml2-2.9.1-6.6.42.amzn1.src

x86_64:
    libxml2-2.9.1-6.6.42.amzn1.x86_64
    libxml2-debuginfo-2.9.1-6.6.42.amzn1.x86_64
    libxml2-static-2.9.1-6.6.42.amzn1.x86_64
    libxml2-devel-2.9.1-6.6.42.amzn1.x86_64
    libxml2-python26-2.9.1-6.6.42.amzn1.x86_64
    libxml2-python27-2.9.1-6.6.42.amzn1.x86_64

Vulnerable software versions

Amazon Linux AMI: All versions

libxml2: before 2.9.1-6.6.42

External links

http://alas.aws.amazon.com/ALAS-2023-1743.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) Use-after-free

EUVDB-ID: #VU54222

Risk: High

CVSSv3.1: 7.7 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-3516

CWE-ID: CWE-416 - Use After Free

Exploit availability: No

Description

The vulnerability allows a remote attacker to compromise vulnerable system.

The vulnerability exists due to a use-after-free error in xmllint. A remote attacker can use a specially crafted file to execute arbitrary code on the target system.

Successful exploitation of the vulnerability may allow an attacker to compromise vulnerable system.

Mitigation

Update the affected packages:

i686:
    libxml2-python27-2.9.1-6.6.42.amzn1.i686
    libxml2-debuginfo-2.9.1-6.6.42.amzn1.i686
    libxml2-2.9.1-6.6.42.amzn1.i686
    libxml2-devel-2.9.1-6.6.42.amzn1.i686
    libxml2-python26-2.9.1-6.6.42.amzn1.i686
    libxml2-static-2.9.1-6.6.42.amzn1.i686

src:
    libxml2-2.9.1-6.6.42.amzn1.src

x86_64:
    libxml2-2.9.1-6.6.42.amzn1.x86_64
    libxml2-debuginfo-2.9.1-6.6.42.amzn1.x86_64
    libxml2-static-2.9.1-6.6.42.amzn1.x86_64
    libxml2-devel-2.9.1-6.6.42.amzn1.x86_64
    libxml2-python26-2.9.1-6.6.42.amzn1.x86_64
    libxml2-python27-2.9.1-6.6.42.amzn1.x86_64

Vulnerable software versions

Amazon Linux AMI: All versions

libxml2: before 2.9.1-6.6.42

External links

http://alas.aws.amazon.com/ALAS-2023-1743.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.

4) Out-of-bounds write

EUVDB-ID: #VU54224

Risk: High

CVSSv3.1: 8.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-3517

CWE-ID: CWE-787 - Out-of-bounds write

Exploit availability: No

Description

The vulnerability allows a remote attacker to compromise vulnerable system.

The vulnerability exists due to a boundary error when processing untrusted input in the xml entity encoding functionality. A remote attacker can create a specially crafted file, trick the victim into opening it using the affected software, trigger out-of-bounds write and execute arbitrary code on the target system.

Mitigation

Update the affected packages:

i686:
    libxml2-python27-2.9.1-6.6.42.amzn1.i686
    libxml2-debuginfo-2.9.1-6.6.42.amzn1.i686
    libxml2-2.9.1-6.6.42.amzn1.i686
    libxml2-devel-2.9.1-6.6.42.amzn1.i686
    libxml2-python26-2.9.1-6.6.42.amzn1.i686
    libxml2-static-2.9.1-6.6.42.amzn1.i686

src:
    libxml2-2.9.1-6.6.42.amzn1.src

x86_64:
    libxml2-2.9.1-6.6.42.amzn1.x86_64
    libxml2-debuginfo-2.9.1-6.6.42.amzn1.x86_64
    libxml2-static-2.9.1-6.6.42.amzn1.x86_64
    libxml2-devel-2.9.1-6.6.42.amzn1.x86_64
    libxml2-python26-2.9.1-6.6.42.amzn1.x86_64
    libxml2-python27-2.9.1-6.6.42.amzn1.x86_64

Vulnerable software versions

Amazon Linux AMI: All versions

libxml2: before 2.9.1-6.6.42

External links

http://alas.aws.amazon.com/ALAS-2023-1743.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.

5) Use-after-free

EUVDB-ID: #VU54225

Risk: High

CVSSv3.1: 7.7 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-3518

CWE-ID: CWE-416 - Use After Free

Exploit availability: No

Description

The vulnerability allows a remote attacker to compromise vulnerable system.

The vulnerability exists due to a use-after-free error in libxml2. A remote attacker can use a specially crafted file and execute arbitrary code on the target system.

Successful exploitation of the vulnerability may allow an attacker to compromise vulnerable system.

Mitigation

Update the affected packages:

i686:
    libxml2-python27-2.9.1-6.6.42.amzn1.i686
    libxml2-debuginfo-2.9.1-6.6.42.amzn1.i686
    libxml2-2.9.1-6.6.42.amzn1.i686
    libxml2-devel-2.9.1-6.6.42.amzn1.i686
    libxml2-python26-2.9.1-6.6.42.amzn1.i686
    libxml2-static-2.9.1-6.6.42.amzn1.i686

src:
    libxml2-2.9.1-6.6.42.amzn1.src

x86_64:
    libxml2-2.9.1-6.6.42.amzn1.x86_64
    libxml2-debuginfo-2.9.1-6.6.42.amzn1.x86_64
    libxml2-static-2.9.1-6.6.42.amzn1.x86_64
    libxml2-devel-2.9.1-6.6.42.amzn1.x86_64
    libxml2-python26-2.9.1-6.6.42.amzn1.x86_64
    libxml2-python27-2.9.1-6.6.42.amzn1.x86_64

Vulnerable software versions

Amazon Linux AMI: All versions

libxml2: before 2.9.1-6.6.42

External links

http://alas.aws.amazon.com/ALAS-2023-1743.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.

6) NULL pointer dereference

EUVDB-ID: #VU54223

Risk: Medium

CVSSv3.1: 5.2 [CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-3537

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. A remote attacker can pass specially crafted data to the application and perform a denial of service (DoS) attack.

Mitigation

Update the affected packages:

i686:
    libxml2-python27-2.9.1-6.6.42.amzn1.i686
    libxml2-debuginfo-2.9.1-6.6.42.amzn1.i686
    libxml2-2.9.1-6.6.42.amzn1.i686
    libxml2-devel-2.9.1-6.6.42.amzn1.i686
    libxml2-python26-2.9.1-6.6.42.amzn1.i686
    libxml2-static-2.9.1-6.6.42.amzn1.i686

src:
    libxml2-2.9.1-6.6.42.amzn1.src

x86_64:
    libxml2-2.9.1-6.6.42.amzn1.x86_64
    libxml2-debuginfo-2.9.1-6.6.42.amzn1.x86_64
    libxml2-static-2.9.1-6.6.42.amzn1.x86_64
    libxml2-devel-2.9.1-6.6.42.amzn1.x86_64
    libxml2-python26-2.9.1-6.6.42.amzn1.x86_64
    libxml2-python27-2.9.1-6.6.42.amzn1.x86_64

Vulnerable software versions

Amazon Linux AMI: All versions

libxml2: before 2.9.1-6.6.42

External links

http://alas.aws.amazon.com/ALAS-2023-1743.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.

7) Input validation error

EUVDB-ID: #VU53289

Risk: Medium

CVSSv3.1: 6.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-3541

CWE-ID: CWE-20 - Improper input validation

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. A remote attacker can pass specially crafted input to the application and perform a denial of service (DoS) attack.

Mitigation

Update the affected packages:

i686:
    libxml2-python27-2.9.1-6.6.42.amzn1.i686
    libxml2-debuginfo-2.9.1-6.6.42.amzn1.i686
    libxml2-2.9.1-6.6.42.amzn1.i686
    libxml2-devel-2.9.1-6.6.42.amzn1.i686
    libxml2-python26-2.9.1-6.6.42.amzn1.i686
    libxml2-static-2.9.1-6.6.42.amzn1.i686

src:
    libxml2-2.9.1-6.6.42.amzn1.src

x86_64:
    libxml2-2.9.1-6.6.42.amzn1.x86_64
    libxml2-debuginfo-2.9.1-6.6.42.amzn1.x86_64
    libxml2-static-2.9.1-6.6.42.amzn1.x86_64
    libxml2-devel-2.9.1-6.6.42.amzn1.x86_64
    libxml2-python26-2.9.1-6.6.42.amzn1.x86_64
    libxml2-python27-2.9.1-6.6.42.amzn1.x86_64

Vulnerable software versions

Amazon Linux AMI: All versions

libxml2: before 2.9.1-6.6.42

External links

http://alas.aws.amazon.com/ALAS-2023-1743.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.

8) Use-after-free

EUVDB-ID: #VU60922

Risk: High

CVSSv3.1: 8.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2022-23308

CWE-ID: CWE-416 - Use After Free

Exploit availability: No

Description

The vulnerability allows a remote attacker to compromise vulnerable system.

The vulnerability exists due to a use-after-free error when processing ID and IDREF attributes in valid.c. A remote attacker can pass specially crafted XML input to the application, trigger a use-after-free error and crash the application or execute arbitrary code on the system.

Successful exploitation of the vulnerability may allow an attacker to compromise vulnerable system.

Mitigation

Update the affected packages:

i686:
    libxml2-python27-2.9.1-6.6.42.amzn1.i686
    libxml2-debuginfo-2.9.1-6.6.42.amzn1.i686
    libxml2-2.9.1-6.6.42.amzn1.i686
    libxml2-devel-2.9.1-6.6.42.amzn1.i686
    libxml2-python26-2.9.1-6.6.42.amzn1.i686
    libxml2-static-2.9.1-6.6.42.amzn1.i686

src:
    libxml2-2.9.1-6.6.42.amzn1.src

x86_64:
    libxml2-2.9.1-6.6.42.amzn1.x86_64
    libxml2-debuginfo-2.9.1-6.6.42.amzn1.x86_64
    libxml2-static-2.9.1-6.6.42.amzn1.x86_64
    libxml2-devel-2.9.1-6.6.42.amzn1.x86_64
    libxml2-python26-2.9.1-6.6.42.amzn1.x86_64
    libxml2-python27-2.9.1-6.6.42.amzn1.x86_64

Vulnerable software versions

Amazon Linux AMI: All versions

libxml2: before 2.9.1-6.6.42

External links

http://alas.aws.amazon.com/ALAS-2023-1743.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.

9) Integer overflow

EUVDB-ID: #VU62741

Risk: High

CVSSv3.1: 8.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2022-29824

CWE-ID: CWE-190 - Integer overflow

Exploit availability: No

Description

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

The vulnerability exists due to integer overflow in several buffer handling functions in buf.c (xmlBuf*) and tree.c (xmlBuffer*). A remote attacker can pass specially crafted multi-gigabyte XML file to the application, trigger integer overflow and execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Mitigation

Update the affected packages:

i686:
    libxml2-python27-2.9.1-6.6.42.amzn1.i686
    libxml2-debuginfo-2.9.1-6.6.42.amzn1.i686
    libxml2-2.9.1-6.6.42.amzn1.i686
    libxml2-devel-2.9.1-6.6.42.amzn1.i686
    libxml2-python26-2.9.1-6.6.42.amzn1.i686
    libxml2-static-2.9.1-6.6.42.amzn1.i686

src:
    libxml2-2.9.1-6.6.42.amzn1.src

x86_64:
    libxml2-2.9.1-6.6.42.amzn1.x86_64
    libxml2-debuginfo-2.9.1-6.6.42.amzn1.x86_64
    libxml2-static-2.9.1-6.6.42.amzn1.x86_64
    libxml2-devel-2.9.1-6.6.42.amzn1.x86_64
    libxml2-python26-2.9.1-6.6.42.amzn1.x86_64
    libxml2-python27-2.9.1-6.6.42.amzn1.x86_64

Vulnerable software versions

Amazon Linux AMI: All versions

libxml2: before 2.9.1-6.6.42

External links

http://alas.aws.amazon.com/ALAS-2023-1743.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.

10) Integer overflow

EUVDB-ID: #VU68828

Risk: High

CVSSv3.1: 8.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2022-40303

CWE-ID: CWE-190 - Integer overflow

Exploit availability: No

Description

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

The vulnerability exists due to integer overflow in parse.c when processing content when XML_PARSE_HUGE is set. A remote attacker can pass specially crafted data to the application, trigger an integer overflow and execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Mitigation

Update the affected packages:

i686:
    libxml2-python27-2.9.1-6.6.42.amzn1.i686
    libxml2-debuginfo-2.9.1-6.6.42.amzn1.i686
    libxml2-2.9.1-6.6.42.amzn1.i686
    libxml2-devel-2.9.1-6.6.42.amzn1.i686
    libxml2-python26-2.9.1-6.6.42.amzn1.i686
    libxml2-static-2.9.1-6.6.42.amzn1.i686

src:
    libxml2-2.9.1-6.6.42.amzn1.src

x86_64:
    libxml2-2.9.1-6.6.42.amzn1.x86_64
    libxml2-debuginfo-2.9.1-6.6.42.amzn1.x86_64
    libxml2-static-2.9.1-6.6.42.amzn1.x86_64
    libxml2-devel-2.9.1-6.6.42.amzn1.x86_64
    libxml2-python26-2.9.1-6.6.42.amzn1.x86_64
    libxml2-python27-2.9.1-6.6.42.amzn1.x86_64

Vulnerable software versions

Amazon Linux AMI: All versions

libxml2: before 2.9.1-6.6.42

External links

http://alas.aws.amazon.com/ALAS-2023-1743.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.

11) Resource management error

EUVDB-ID: #VU68829

Risk: Medium

CVSSv3.1: 6.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2022-40304

CWE-ID: CWE-399 - Resource Management Errors

Exploit availability: No

Description

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

The vulnerability exists in entities.c due to the way libxml2 handles reference cycles. The library does not anticipate that entity content can be allocated from a dict and clears it upon reference cycle detection by setting its first byte to zero. This can lead to memory corruption  issues, such as double free errors and result in a denial of service.

Mitigation

Update the affected packages:

i686:
    libxml2-python27-2.9.1-6.6.42.amzn1.i686
    libxml2-debuginfo-2.9.1-6.6.42.amzn1.i686
    libxml2-2.9.1-6.6.42.amzn1.i686
    libxml2-devel-2.9.1-6.6.42.amzn1.i686
    libxml2-python26-2.9.1-6.6.42.amzn1.i686
    libxml2-static-2.9.1-6.6.42.amzn1.i686

src:
    libxml2-2.9.1-6.6.42.amzn1.src

x86_64:
    libxml2-2.9.1-6.6.42.amzn1.x86_64
    libxml2-debuginfo-2.9.1-6.6.42.amzn1.x86_64
    libxml2-static-2.9.1-6.6.42.amzn1.x86_64
    libxml2-devel-2.9.1-6.6.42.amzn1.x86_64
    libxml2-python26-2.9.1-6.6.42.amzn1.x86_64
    libxml2-python27-2.9.1-6.6.42.amzn1.x86_64

Vulnerable software versions

Amazon Linux AMI: All versions

libxml2: before 2.9.1-6.6.42

External links

http://alas.aws.amazon.com/ALAS-2023-1743.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.

12) NULL pointer dereference

EUVDB-ID: #VU74863

Risk: Medium

CVSSv3.1: 6.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2023-28484

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 in xmlSchemaFixupComplexType. A remote attacker can pass specially crafted data to the application and perform a denial of service (DoS) attack.

Mitigation

Update the affected packages:

i686:
    libxml2-python27-2.9.1-6.6.42.amzn1.i686
    libxml2-debuginfo-2.9.1-6.6.42.amzn1.i686
    libxml2-2.9.1-6.6.42.amzn1.i686
    libxml2-devel-2.9.1-6.6.42.amzn1.i686
    libxml2-python26-2.9.1-6.6.42.amzn1.i686
    libxml2-static-2.9.1-6.6.42.amzn1.i686

src:
    libxml2-2.9.1-6.6.42.amzn1.src

x86_64:
    libxml2-2.9.1-6.6.42.amzn1.x86_64
    libxml2-debuginfo-2.9.1-6.6.42.amzn1.x86_64
    libxml2-static-2.9.1-6.6.42.amzn1.x86_64
    libxml2-devel-2.9.1-6.6.42.amzn1.x86_64
    libxml2-python26-2.9.1-6.6.42.amzn1.x86_64
    libxml2-python27-2.9.1-6.6.42.amzn1.x86_64

Vulnerable software versions

Amazon Linux AMI: All versions

libxml2: before 2.9.1-6.6.42

External links

http://alas.aws.amazon.com/ALAS-2023-1743.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.

13) Resource management error

EUVDB-ID: #VU74862

Risk: Medium

CVSSv3.1: 6.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2023-29469

CWE-ID: CWE-399 - Resource Management Errors

Exploit availability: No

Description

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

The vulnerability exists due to improper management of internal resources when working with hashes of empty dict strings. A remote attacker can and perform a denial of service (DoS) attack.

Mitigation

Update the affected packages:

i686:
    libxml2-python27-2.9.1-6.6.42.amzn1.i686
    libxml2-debuginfo-2.9.1-6.6.42.amzn1.i686
    libxml2-2.9.1-6.6.42.amzn1.i686
    libxml2-devel-2.9.1-6.6.42.amzn1.i686
    libxml2-python26-2.9.1-6.6.42.amzn1.i686
    libxml2-static-2.9.1-6.6.42.amzn1.i686

src:
    libxml2-2.9.1-6.6.42.amzn1.src

x86_64:
    libxml2-2.9.1-6.6.42.amzn1.x86_64
    libxml2-debuginfo-2.9.1-6.6.42.amzn1.x86_64
    libxml2-static-2.9.1-6.6.42.amzn1.x86_64
    libxml2-devel-2.9.1-6.6.42.amzn1.x86_64
    libxml2-python26-2.9.1-6.6.42.amzn1.x86_64
    libxml2-python27-2.9.1-6.6.42.amzn1.x86_64

Vulnerable software versions

Amazon Linux AMI: All versions

libxml2: before 2.9.1-6.6.42

External links

http://alas.aws.amazon.com/ALAS-2023-1743.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.



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