Debian update for nss



Risk High
Patch available YES
Number of vulnerabilities 2
CVE-ID CVE-2019-17007
CVE-2019-11745
CWE-ID CWE-20
CWE-787
Exploitation vector Network
Public exploit N/A
Vulnerable software
 nss (Debian package)
Operating systems & Components / Operating system package or component

Vendor Debian

Security Bulletin

This security bulletin contains information about 2 vulnerabilities.

1) Input validation error

EUVDB-ID: #VU23467

Risk: Medium

CVSSv4.0: 6.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2019-17007

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 within the collect_certs() function in /lib/pkcs7/certread.c in Mozilla NSS library. A remote attacker can supply a specially crafted certificate to the application and perform a denial of service attack.

Mitigation

Update the affected package to version: 2:3.42.1-1+deb10u2.

Vulnerable software versions

nss (Debian package): 2:3.42.1-1+deb10u1 - 2:3.42.1-1

CPE2.3 External links

https://www.debian.org/security/2019/dsa-4579


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 write

EUVDB-ID: #VU23050

Risk: High

CVSSv4.0: 8.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber]

CVE-ID: CVE-2019-11745

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 within the NSC_EncryptUpdate() function in /lib/softoken/pkcs11c.c, when performing padding operations in Mozilla NSS. A remote attacker can pass specially crafted data to the affected application, trigger out-of-bounds write and execute arbitrary code on the target system.

Mitigation

Update the affected package to version: 2:3.42.1-1+deb10u2.

Vulnerable software versions

nss (Debian package): 2:3.42.1-1+deb10u1 - 2:3.42.1-1

CPE2.3 External links

https://www.debian.org/security/2019/dsa-4579


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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