SUSE update for apache2

Published: 2021-06-22

Risk	Medium
Patch available	YES
Number of vulnerabilities	6
CVE-ID	CVE-2020-13950 CVE-2020-35452 CVE-2021-26690 CVE-2021-26691 CVE-2021-30641 CVE-2021-31618
CWE-ID	CWE-476 CWE-121 CWE-20
Exploitation vector	Network
Public exploit	N/A
Vulnerable software Subscribe	SUSE Linux Enterprise Module for Packagehub Subpackages Operating systems & Components / Operating system package or component apache2-utils-debuginfo Operating systems & Components / Operating system package or component apache2-utils Operating systems & Components / Operating system package or component apache2-prefork-debuginfo Operating systems & Components / Operating system package or component apache2-prefork Operating systems & Components / Operating system package or component apache2 Operating systems & Components / Operating system package or component apache2-event-debuginfo Operating systems & Components / Operating system package or component apache2-event Operating systems & Components / Operating system package or component apache2-doc Operating systems & Components / Operating system package or component apache2-worker-debuginfo Operating systems & Components / Operating system package or component apache2-worker Operating systems & Components / Operating system package or component apache2-devel Operating systems & Components / Operating system package or component apache2-debugsource Operating systems & Components / Operating system package or component apache2-debuginfo Operating systems & Components / Operating system package or component SUSE Linux Enterprise Module for Server Applications Operating systems & Components / Operating system SUSE Linux Enterprise Module for Basesystem Operating systems & Components / Operating system
Vendor	SUSE

Security Bulletin

This security bulletin contains information about 6 vulnerabilities.

1) NULL pointer dereference

EUVDB-ID: #VU53778

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-2020-13950

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

Mitigation

Update the affected package apache2 to the latest version.

Vulnerable software versions

SUSE Linux Enterprise Module for Packagehub Subpackages: 15-SP3

SUSE Linux Enterprise Module for Server Applications: 15-SP2 - 15-SP3

SUSE Linux Enterprise Module for Basesystem: 15-SP2 - 15-SP3

apache2-utils-debuginfo: before 2.4.43-3.22.1

apache2-utils: before 2.4.43-3.22.1

apache2-prefork-debuginfo: before 2.4.43-3.22.1

apache2-prefork: before 2.4.43-3.22.1

apache2: before 2.4.43-3.22.1

apache2-event-debuginfo: before 2.4.43-3.22.1

apache2-event: before 2.4.43-3.22.1

apache2-doc: before 2.4.43-3.22.1

apache2-worker-debuginfo: before 2.4.43-3.22.1

apache2-worker: before 2.4.43-3.22.1

apache2-devel: before 2.4.43-3.22.1

apache2-debugsource: before 2.4.43-3.22.1

apache2-debuginfo: before 2.4.43-3.22.1

External links

http://www.suse.com/support/update/announcement/2021/suse-su-20212127-1/

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) Stack-based buffer overflow

EUVDB-ID: #VU53775

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-2020-35452

CWE-ID: CWE-121 - Stack-based buffer overflow

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 error when processing Digest nounces in mod_auth_digest. A remote unauthenticated attacker can send a specially crafted HTTP request, trigger stack overflow by one nul byte and crash the server.

Mitigation

Update the affected package apache2 to the latest version.

Vulnerable software versions

SUSE Linux Enterprise Module for Packagehub Subpackages: 15-SP3

SUSE Linux Enterprise Module for Server Applications: 15-SP2 - 15-SP3

SUSE Linux Enterprise Module for Basesystem: 15-SP2 - 15-SP3

apache2-utils-debuginfo: before 2.4.43-3.22.1

apache2-utils: before 2.4.43-3.22.1

apache2-prefork-debuginfo: before 2.4.43-3.22.1

apache2-prefork: before 2.4.43-3.22.1

apache2: before 2.4.43-3.22.1

apache2-event-debuginfo: before 2.4.43-3.22.1

apache2-event: before 2.4.43-3.22.1

apache2-doc: before 2.4.43-3.22.1

apache2-worker-debuginfo: before 2.4.43-3.22.1

apache2-worker: before 2.4.43-3.22.1

apache2-devel: before 2.4.43-3.22.1

apache2-debugsource: before 2.4.43-3.22.1

apache2-debuginfo: before 2.4.43-3.22.1

External links

http://www.suse.com/support/update/announcement/2021/suse-su-20212127-1/

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) NULL pointer dereference

EUVDB-ID: #VU53777

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-2021-26690

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

Mitigation

Update the affected package apache2 to the latest version.

Vulnerable software versions

SUSE Linux Enterprise Module for Packagehub Subpackages: 15-SP3

SUSE Linux Enterprise Module for Server Applications: 15-SP2 - 15-SP3

SUSE Linux Enterprise Module for Basesystem: 15-SP2 - 15-SP3

apache2-utils-debuginfo: before 2.4.43-3.22.1

apache2-utils: before 2.4.43-3.22.1

apache2-prefork-debuginfo: before 2.4.43-3.22.1

apache2-prefork: before 2.4.43-3.22.1

apache2: before 2.4.43-3.22.1

apache2-event-debuginfo: before 2.4.43-3.22.1

apache2-event: before 2.4.43-3.22.1

apache2-doc: before 2.4.43-3.22.1

apache2-worker-debuginfo: before 2.4.43-3.22.1

apache2-worker: before 2.4.43-3.22.1

apache2-devel: before 2.4.43-3.22.1

apache2-debugsource: before 2.4.43-3.22.1

apache2-debuginfo: before 2.4.43-3.22.1

External links

http://www.suse.com/support/update/announcement/2021/suse-su-20212127-1/

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) NULL pointer dereference

EUVDB-ID: #VU53776

Risk: Low

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-2021-26691

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 mod_session. A a malicious backend server or SessionHeader can trigger a denial of service (DoS) condition.

Mitigation

Update the affected package apache2 to the latest version.

Vulnerable software versions

SUSE Linux Enterprise Module for Packagehub Subpackages: 15-SP3

SUSE Linux Enterprise Module for Server Applications: 15-SP2 - 15-SP3

SUSE Linux Enterprise Module for Basesystem: 15-SP2 - 15-SP3

apache2-utils-debuginfo: before 2.4.43-3.22.1

apache2-utils: before 2.4.43-3.22.1

apache2-prefork-debuginfo: before 2.4.43-3.22.1

apache2-prefork: before 2.4.43-3.22.1

apache2: before 2.4.43-3.22.1

apache2-event-debuginfo: before 2.4.43-3.22.1

apache2-event: before 2.4.43-3.22.1

apache2-doc: before 2.4.43-3.22.1

apache2-worker-debuginfo: before 2.4.43-3.22.1

apache2-worker: before 2.4.43-3.22.1

apache2-devel: before 2.4.43-3.22.1

apache2-debugsource: before 2.4.43-3.22.1

apache2-debuginfo: before 2.4.43-3.22.1

External links

http://www.suse.com/support/update/announcement/2021/suse-su-20212127-1/

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) Input validation error

EUVDB-ID: #VU53774

Risk: Medium

CVSSv3.1: 6.4 [CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-30641

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

The vulnerability allows a remote attacker to bypass implemented security restrictions.

The vulnerability exists due to incorrect parsing of Apache configuration files. An unexpected section could be matched with 'MergeSlashes OFF' option, leading to a potential security issue.

Mitigation

Update the affected package apache2 to the latest version.

Vulnerable software versions

SUSE Linux Enterprise Module for Packagehub Subpackages: 15-SP3

SUSE Linux Enterprise Module for Server Applications: 15-SP2 - 15-SP3

SUSE Linux Enterprise Module for Basesystem: 15-SP2 - 15-SP3

apache2-utils-debuginfo: before 2.4.43-3.22.1

apache2-utils: before 2.4.43-3.22.1

apache2-prefork-debuginfo: before 2.4.43-3.22.1

apache2-prefork: before 2.4.43-3.22.1

apache2: before 2.4.43-3.22.1

apache2-event-debuginfo: before 2.4.43-3.22.1

apache2-event: before 2.4.43-3.22.1

apache2-doc: before 2.4.43-3.22.1

apache2-worker-debuginfo: before 2.4.43-3.22.1

apache2-worker: before 2.4.43-3.22.1

apache2-devel: before 2.4.43-3.22.1

apache2-debugsource: before 2.4.43-3.22.1

apache2-debuginfo: before 2.4.43-3.22.1

External links

http://www.suse.com/support/update/announcement/2021/suse-su-20212127-1/

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: #VU53773

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-2021-31618

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 mod_http2 in Apache HTTP server. A remote attacker can send specially crafted request to the server and perform a denial of service (DoS) attack.

Mitigation

Update the affected package apache2 to the latest version.

Vulnerable software versions

SUSE Linux Enterprise Module for Packagehub Subpackages: 15-SP3

SUSE Linux Enterprise Module for Server Applications: 15-SP2 - 15-SP3

SUSE Linux Enterprise Module for Basesystem: 15-SP2 - 15-SP3

apache2-utils-debuginfo: before 2.4.43-3.22.1

apache2-utils: before 2.4.43-3.22.1

apache2-prefork-debuginfo: before 2.4.43-3.22.1

apache2-prefork: before 2.4.43-3.22.1

apache2: before 2.4.43-3.22.1

apache2-event-debuginfo: before 2.4.43-3.22.1

apache2-event: before 2.4.43-3.22.1

apache2-doc: before 2.4.43-3.22.1

apache2-worker-debuginfo: before 2.4.43-3.22.1

apache2-worker: before 2.4.43-3.22.1

apache2-devel: before 2.4.43-3.22.1

apache2-debugsource: before 2.4.43-3.22.1

apache2-debuginfo: before 2.4.43-3.22.1

External links

http://www.suse.com/support/update/announcement/2021/suse-su-20212127-1/

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.