Fedora EPEL 5 update for openssl101e

1) Memory corruption

EUVDB-ID: #VU638

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-2016-2108

CWE-ID: CWE-120 - Buffer overflow

Exploit availability: No

Description

The vulnerability allows a remote user to cause memory corruption on the target system.

The weakness exists due to buffer underflow with an out-of-bounds write in i2c_ASN1_INTEGER. As ASN.1 parser (specifically, d2i_ASN1_TYPE) can misinterpret a large universal tag as a negative zero value, attacker may easily corrupt memory.

Successful exploitation of the vulnerability will allow a malicious user to trigger memory corruption on the vulnerable system.

Mitigation

Install updates from vendor's repository.

Vulnerable software versions

Fedora: 5

openssl101e: before 1.0.1e-8.el5

CPE2.3

• cpe:2.3:o:fedoraproject:fedora:5:*:*:*:*:*:*:*
• cpe:2.3:a:fedoraproject:openssl101e:*:*:*:*:*:fedora:*:*

External links

https://bodhi.fedoraproject.org/updates/FEDORA-EPEL-2016-92e8b90065

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) Heap overflow

EUVDB-ID: #VU640

Risk: Low

CVSSv4.0: 2.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2016-2105

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

The vulnerability allows a remote user to cause heap overflow on the target system.

The weakness is caused by insufficient input validation. By sending a great deal of input data attackers are able to cause overflow of the EVP_EncodeUpdate() function used for binary data encoding.

Successful exploitation of the vulnerability may result in heap overflow on the vulnerable system.

Mitigation

Install updates from vendor's repository.

Vulnerable software versions

Fedora: 5

openssl101e: before 1.0.1e-8.el5

CPE2.3

• cpe:2.3:o:fedoraproject:fedora:5:*:*:*:*:*:*:*
• cpe:2.3:a:fedoraproject:openssl101e:*:*:*:*:*:fedora:*:*

External links

https://bodhi.fedoraproject.org/updates/FEDORA-EPEL-2016-92e8b90065

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) Input validation error

EUVDB-ID: #VU33809

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-2016-2106

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

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

Integer overflow in the EVP_EncryptUpdate function in crypto/evp/evp_enc.c in OpenSSL before 1.0.1t and 1.0.2 before 1.0.2h allows remote attackers to cause a denial of service (heap memory corruption) via a large amount of data.

Mitigation

Install updates from vendor's repository.

Vulnerable software versions

Fedora: 5

openssl101e: before 1.0.1e-8.el5

CPE2.3

• cpe:2.3:o:fedoraproject:fedora:5:*:*:*:*:*:*:*
• cpe:2.3:a:fedoraproject:openssl101e:*:*:*:*:*:fedora:*:*

External links

https://bodhi.fedoraproject.org/updates/FEDORA-EPEL-2016-92e8b90065

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) Traffic decryption

EUVDB-ID: #VU639

Risk: High

CVSSv4.0: 7.8 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:L/VA:L/SC:N/SI:N/SA:N/E:P/U:Amber]

CVE-ID: CVE-2016-2107

CWE-ID: CWE-284 - Improper Access Control

Exploit availability: Yes

Description

The vulnerability allows a remote user to decrypt traffic on the target system.

The weakness is due to access control error.If the connection uses an AES CBC cipher and the server support AES-NI attackers can perform padding oracle attack.

Successful exploitation of the vulnerability leads to traffic decryption on the vulnerable system.

Mitigation

Install updates from vendor's repository.

Vulnerable software versions

Fedora: 5

openssl101e: before 1.0.1e-8.el5

CPE2.3

• cpe:2.3:o:fedoraproject:fedora:5:*:*:*:*:*:*:*
• cpe:2.3:a:fedoraproject:openssl101e:*:*:*:*:*:fedora:*:*

External links

https://bodhi.fedoraproject.org/updates/FEDORA-EPEL-2016-92e8b90065

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.

5) Buffer overflow

EUVDB-ID: #VU82376

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-2016-0799

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 due to fmtstr function in crypto/bio/b_print.c in OpenSSL improperly calculates string lengths. A remote attacker can cause a denial of service (overflow and out-of-bounds read) or possibly have unspecified other impact via a long string.

Mitigation

Install updates from vendor's repository.

Vulnerable software versions

Fedora: 5

openssl101e: before 1.0.1e-8.el5

CPE2.3

• cpe:2.3:o:fedoraproject:fedora:5:*:*:*:*:*:*:*
• cpe:2.3:a:fedoraproject:openssl101e:*:*:*:*:*:fedora:*:*

External links

https://bodhi.fedoraproject.org/updates/FEDORA-EPEL-2016-92e8b90065

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) Buffer overflow

EUVDB-ID: #VU89734

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-2016-2842

CWE-ID: CWE-119 - Memory corruption

Exploit availability: No

Description

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

The vulnerability exists due to a doapr_outch function in crypto/bio/b_print.c in OpenSSL does not verify that a certain memory allocation succeeds. A remote attacker can cause a denial of service (out-of-bounds write or memory consumption) or possibly have unspecified other impact via a long string

Mitigation

Install updates from vendor's repository.

Vulnerable software versions

Fedora: 5

openssl101e: before 1.0.1e-8.el5

CPE2.3

• cpe:2.3:o:fedoraproject:fedora:5:*:*:*:*:*:*:*
• cpe:2.3:a:fedoraproject:openssl101e:*:*:*:*:*:fedora:*:*

External links

https://bodhi.fedoraproject.org/updates/FEDORA-EPEL-2016-92e8b90065

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.

7) Excessive memory allocation

EUVDB-ID: #VU641

Risk: Low

CVSSv4.0: 2.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2016-2109

CWE-ID: CWE-119 - Memory corruption

Exploit availability: No

Description

The vulnerability allows a remote user to cause excessive memory allocation on the target system.

The weakness exists during reading ASN.1 data by d2i_CMS_bio() function. A short invalid encoding leads to distribution of large amounts of memory for excessive resources or exhausting memory.

Successful exploitation of the vulnerability may result in excessive memory allocation.

Mitigation

Install updates from vendor's repository.

Vulnerable software versions

Fedora: 5

openssl101e: before 1.0.1e-8.el5

CPE2.3

• cpe:2.3:o:fedoraproject:fedora:5:*:*:*:*:*:*:*
• cpe:2.3:a:fedoraproject:openssl101e:*:*:*:*:*:fedora:*:*

External links

https://bodhi.fedoraproject.org/updates/FEDORA-EPEL-2016-92e8b90065

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.

8) Information disclosure

EUVDB-ID: #VU1914

Risk: Medium

CVSSv4.0: 9.1 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:A/U:Green]

CVE-ID: CVE-2016-0800

CWE-ID: CWE-327 - Use of a Broken or Risky Cryptographic Algorithm

Exploit availability: Yes

Description

The vulnerability allows a remote attacker to decrypt sensitive information.

The vulnerability exists due to usage of weak SSLv2 protocol, which requires to send a ServerVerify message before establishing that a client possesses certain plaintext RSA data. A remote attacker can decrypt TLS ciphertext data by leveraging a Bleichenbacher RSA padding oracle.

The vulnerability is dubbed "DROWN" attack.

Mitigation

Install updates from vendor's repository.

Vulnerable software versions

Fedora: 5

openssl101e: before 1.0.1e-8.el5

CPE2.3

• cpe:2.3:o:fedoraproject:fedora:5:*:*:*:*:*:*:*
• cpe:2.3:a:fedoraproject:openssl101e:*:*:*:*:*:fedora:*:*

External links

https://bodhi.fedoraproject.org/updates/FEDORA-EPEL-2016-92e8b90065

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, a fully functional exploit for this vulnerability is available.