SUSE update for tar

Published: 2022-05-05

Risk	Medium
Patch available	YES
Number of vulnerabilities	3
CVE-ID	CVE-2018-20482 CVE-2019-9923 CVE-2021-20193
CWE-ID	CWE-835 CWE-476 CWE-401
Exploitation vector	Network
Public exploit	Public exploit code for vulnerability #1 is available.
Vulnerable software Subscribe	SUSE Linux Enterprise Realtime Extension Operating systems & Components / Operating system SUSE Linux Enterprise Micro Operating systems & Components / Operating system SUSE Linux Enterprise Server Operating systems & Components / Operating system SUSE Linux Enterprise High Performance Computing Operating systems & Components / Operating system SUSE Linux Enterprise Desktop Operating systems & Components / Operating system openSUSE Leap Operating systems & Components / Operating system SUSE Manager Server Operating systems & Components / Operating system SUSE Manager Proxy Operating systems & Components / Operating system SUSE Linux Enterprise Server for SAP Applications Operating systems & Components / Operating system SUSE Linux Enterprise Module for Basesystem Operating systems & Components / Operating system tar-lang Operating systems & Components / Operating system package or component tar-doc Operating systems & Components / Operating system package or component tar-backup-scripts Operating systems & Components / Operating system package or component tar-tests-debuginfo Operating systems & Components / Operating system package or component tar-tests Operating systems & Components / Operating system package or component tar-rmt-debuginfo Operating systems & Components / Operating system package or component tar-rmt Operating systems & Components / Operating system package or component tar-debugsource Operating systems & Components / Operating system package or component tar-debuginfo Operating systems & Components / Operating system package or component tar Operating systems & Components / Operating system package or component
Vendor	SUSE

Security Bulletin

This security bulletin contains information about 3 vulnerabilities.

1) Infinite loop

EUVDB-ID: #VU16782

Risk: Low

CVSSv3.1: 5 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H/E:P/RL:O/RC:C]

CVE-ID: CVE-2018-20482

CWE-ID: CWE-835 - Loop with Unreachable Exit Condition ('Infinite Loop')

Exploit availability: No

Description

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

The vulnerability exists due to the application mishandles file shrinkage during read access when --sparse is used. A local attacker can trigger infinite read loop in sparse_dump_region in sparse.c by modifying a file that is supposed to be archived by a different user's process (e.g., a system backup running as root) and cause denial of service conditions.

Mitigation

Update the affected package tar to the latest version.

Vulnerable software versions

SUSE Linux Enterprise Realtime Extension: 15-SP2

SUSE Linux Enterprise Micro: 5.0 - 5.2

SUSE Linux Enterprise Server: 15-SP3-LTSS

SUSE Linux Enterprise High Performance Computing: 15-SP3-LTSS

SUSE Linux Enterprise Desktop: 15-SP3

openSUSE Leap: 15.3

SUSE Manager Server: 4.2

SUSE Manager Proxy: 4.2

SUSE Linux Enterprise Server for SAP Applications: 15-SP3

SUSE Linux Enterprise Module for Basesystem: 15-SP3

tar-lang: before 1.34-150000.3.12.1

tar-doc: before 1.34-150000.3.12.1

tar-backup-scripts: before 1.34-150000.3.12.1

tar-tests-debuginfo: before 1.34-150000.3.12.1

tar-tests: before 1.34-150000.3.12.1

tar-rmt-debuginfo: before 1.34-150000.3.12.1

tar-rmt: before 1.34-150000.3.12.1

tar-debugsource: before 1.34-150000.3.12.1

tar-debuginfo: before 1.34-150000.3.12.1

tar: before 1.34-150000.3.12.1

External links

http://www.suse.com/support/update/announcement/2022/suse-su-20221548-1/

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

2) NULL pointer dereference

EUVDB-ID: #VU18058

Risk: Low

CVSSv3.1: 5.7 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2019-9923

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 dreference error in sparse.c in when parsing certain archives that have malformed extended headers. A remote attacker can perform a denial of service (DoS) attack.

Mitigation

Update the affected package tar to the latest version.

Vulnerable software versions

SUSE Linux Enterprise Realtime Extension: 15-SP2

SUSE Linux Enterprise Micro: 5.0 - 5.2

SUSE Linux Enterprise Server: 15-SP3-LTSS

SUSE Linux Enterprise High Performance Computing: 15-SP3-LTSS

SUSE Linux Enterprise Desktop: 15-SP3

openSUSE Leap: 15.3

SUSE Manager Server: 4.2

SUSE Manager Proxy: 4.2

SUSE Linux Enterprise Server for SAP Applications: 15-SP3

SUSE Linux Enterprise Module for Basesystem: 15-SP3

tar-lang: before 1.34-150000.3.12.1

tar-doc: before 1.34-150000.3.12.1

tar-backup-scripts: before 1.34-150000.3.12.1

tar-tests-debuginfo: before 1.34-150000.3.12.1

tar-tests: before 1.34-150000.3.12.1

tar-rmt-debuginfo: before 1.34-150000.3.12.1

tar-rmt: before 1.34-150000.3.12.1

tar-debugsource: before 1.34-150000.3.12.1

tar-debuginfo: before 1.34-150000.3.12.1

tar: before 1.34-150000.3.12.1

External links

http://www.suse.com/support/update/announcement/2022/suse-su-20221548-1/

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) Memory leak

EUVDB-ID: #VU50978

Risk: Medium

CVSSv3.1: 5.7 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-20193

CWE-ID: CWE-401 - Missing release of memory after effective lifetime

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform DoS attack on the target system.

The vulnerability exists due memory leak within the read_header() function in list.c. A remote attacker can pass specially crafted archive to the application and force it to leak memory, which eventually results in a denial of service condition.

Mitigation

Update the affected package tar to the latest version.

Vulnerable software versions

SUSE Linux Enterprise Realtime Extension: 15-SP2

SUSE Linux Enterprise Micro: 5.0 - 5.2

SUSE Linux Enterprise Server: 15-SP3-LTSS

SUSE Linux Enterprise High Performance Computing: 15-SP3-LTSS

SUSE Linux Enterprise Desktop: 15-SP3

openSUSE Leap: 15.3

SUSE Manager Server: 4.2

SUSE Manager Proxy: 4.2

SUSE Linux Enterprise Server for SAP Applications: 15-SP3

SUSE Linux Enterprise Module for Basesystem: 15-SP3

tar-lang: before 1.34-150000.3.12.1

tar-doc: before 1.34-150000.3.12.1

tar-backup-scripts: before 1.34-150000.3.12.1

tar-tests-debuginfo: before 1.34-150000.3.12.1

tar-tests: before 1.34-150000.3.12.1

tar-rmt-debuginfo: before 1.34-150000.3.12.1

tar-rmt: before 1.34-150000.3.12.1

tar-debugsource: before 1.34-150000.3.12.1

tar-debuginfo: before 1.34-150000.3.12.1

tar: before 1.34-150000.3.12.1

External links

http://www.suse.com/support/update/announcement/2022/suse-su-20221548-1/

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.