Debian update for openssl095



Risk Critical
Patch available YES
Number of vulnerabilities 3
CVE-ID CVE-2003-0543
CVE-2003-0544
CVE-2003-0545
CWE-ID CWE-190
CWE-20
CWE-119
Exploitation vector Network
Public exploit Public exploit code for vulnerability #1 is available.
Vulnerable software
 Debian Linux
Operating systems & Components / Operating system

Vendor Debian

Security Bulletin

This security bulletin contains information about 3 vulnerabilities.

1) Integer overflow

EUVDB-ID: #VU249

Risk: Medium

CVSSv4.0: 2 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P/U:Green]

CVE-ID: CVE-2003-0543

CWE-ID: CWE-190 - Integer overflow

Exploit availability: Yes

Description

The vulnerability allows a remote attacker to cause a denial of service.

The vulnerability exists due to an integer overflow in OpenSSL 0.9.6 and 0.9.7. A remote unauthenticated attacker can cause a denial of service via an SSL client certificate with certain ASN.1 tag values.

Successful exploitation of this vulnerability may result in cause a denial of service.

Mitigation

Update the affected package to version:

Vulnerable software versions

Debian Linux: All versions

CPE2.3 External links

https://www.openssl.org/news/vulnerabilities.html#y2002


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

2) Improper input validation

EUVDB-ID: #VU248

Risk: Medium

CVSSv4.0: 1.2 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2003-0544

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

The vulnerability allows a remote attacker to cause a denial of service.

The vulnerability exists due to incorrect tracking of the number of characters in certain ASN.1 inputs. A remote unauthenticated attacker can cause a denial of service by sending an SSL client certificate that causes OpenSSL to read past the end of a buffer when the long form is used.

Successful exploitation of this vulnerability may result in a denial of service.

Mitigation

Update the affected package to version:

Vulnerable software versions

Debian Linux: All versions

CPE2.3 External links

https://www.openssl.org/news/vulnerabilities.html#y2002


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) ASN.1 parser deallocation buffer overflow

EUVDB-ID: #VU247

Risk: Critical

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:Red]

CVE-ID: CVE-2003-0545

CWE-ID: CWE-119 - Memory corruption

Exploit availability: No

Description

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

The vulnerability exists in OpenSSL. A remote unauthenticated attacker can cause a denial of service and possible arbitrary code execution via an SSL client certificate with a certain invalid ASN.1 encoding.

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

Mitigation

Update the affected package to version:

Vulnerable software versions

Debian Linux: All versions

CPE2.3 External links

https://www.openssl.org/news/vulnerabilities.html#y2002


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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