Debian update for sympa

1) Resource exhaustion

EUVDB-ID: #VU49166

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-2020-9369

CWE-ID: CWE-400 - Resource exhaustion

Exploit availability: No

Description

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

The vulnerability exists due to application does not properly control consumption of internal resources. A remote attacker can send a series of requests with malformed parameters and consume all available disk space by creating temporary files.

Mitigation

Update sympa package to version 6.2.40~dfsg-1+deb10u1.

Vulnerable software versions

sympa (Debian package): 6.2.16~dfsg - 6.2.40~dfsg-6

External links

http://www.debian.org/security/2020/dsa-4818

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) Improper Privilege Management

EUVDB-ID: #VU47650

Risk: Low

CVSSv3.1: 6.8 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-10936

CWE-ID: CWE-269 - Improper Privilege Management

Exploit availability: No

Description

The vulnerability allows a local authenticated user to escalate privileges.

The vulnerability exists due to improper management of privileges within the application. A local user can gain elevated privileges via unknown vectors.

Mitigation

Update sympa package to version 6.2.40~dfsg-1+deb10u1.

Vulnerable software versions

sympa (Debian package): 6.2.16~dfsg - 6.2.40~dfsg-6

External links

http://www.debian.org/security/2020/dsa-4818

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.

3) Incorrect permission assignment for critical resource

EUVDB-ID: #VU49167

Risk: Low

CVSSv3.1: 2.9 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-26932

CWE-ID: CWE-732 - Incorrect Permission Assignment for Critical Resource

Exploit availability: No

Description

The vulnerability allows a local user to gain access to sensitive information.

The vulnerability exists due to Debian Sympa package sets insecure permissions of 4755 for sympa_newaliases-wrapper. A local user can gain access to sensitive information.

Mitigation

Update sympa package to version 6.2.40~dfsg-1+deb10u1.

Vulnerable software versions

sympa (Debian package): 6.2.16~dfsg - 6.2.40~dfsg-6

External links

http://www.debian.org/security/2020/dsa-4818

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.

4) Improper Authentication

EUVDB-ID: #VU49168

Risk: Medium

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

CVE-ID: CVE-2020-29668

CWE-ID: CWE-287 - Improper Authentication

Exploit availability: No

Description

The vulnerability allows a remote attacker to bypass authentication process.

The vulnerability exists due to an error in when processing authentication requests. A remote attacker can bypass authentication process and obtain full SOAP API access by sending any arbitrary string (except one from an expired cookie) as the cookie value to authenticateAndRun.

Mitigation

Update sympa package to version 6.2.40~dfsg-1+deb10u1.

Vulnerable software versions

sympa (Debian package): 6.2.16~dfsg - 6.2.40~dfsg-6

External links

http://www.debian.org/security/2020/dsa-4818

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) OS Command Injection

EUVDB-ID: #VU47651

Risk: Low

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

CVE-ID: CVE-2020-26880

CWE-ID: CWE-78 - Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')

Exploit availability: No

Description

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

The vulnerability exists due to incorrect default permissions for the sympa.conf configuration file. A local user with access to modify the file (e.g. the sympa user account) can injection and execute arbitrary OS commands in the system with root privileges via the setuid sympa_newaliases-wrapper executable by parsing the modified sympa.conf file.

Mitigation

Update sympa package to version 6.2.40~dfsg-1+deb10u1.

Vulnerable software versions

sympa (Debian package): 6.2.16~dfsg - 6.2.40~dfsg-6

External links

http://www.debian.org/security/2020/dsa-4818

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.