Gentoo update for OpenSSL

1) 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

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.

Update the affected packages.
dev-libs/openssl to version: 1.0.2j

Gentoo Linux: All versions

dev-libs/openssl: before 1.0.2j

• cpe:2.3:o:gentoo:gentoo_linux:*:*:*:*:*:*:*:*
• cpe:2.3:a:gentoo:dev-libs_openssl:*:*:*:*:*:gentoo_linux:*:*

https://security.gentoo.org/glsa/201612-16

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) 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

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.

Update the affected packages.
dev-libs/openssl to version: 1.0.2j

Gentoo Linux: All versions

dev-libs/openssl: before 1.0.2j

• cpe:2.3:o:gentoo:gentoo_linux:*:*:*:*:*:*:*:*
• cpe:2.3:a:gentoo:dev-libs_openssl:*:*:*:*:*:gentoo_linux:*:*

https://security.gentoo.org/glsa/201612-16

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) 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

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.

Update the affected packages.
dev-libs/openssl to version: 1.0.2j

Gentoo Linux: All versions

dev-libs/openssl: before 1.0.2j

• cpe:2.3:o:gentoo:gentoo_linux:*:*:*:*:*:*:*:*
• cpe:2.3:a:gentoo:dev-libs_openssl:*:*:*:*:*:gentoo_linux:*:*

https://security.gentoo.org/glsa/201612-16

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.

4) 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

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.

Update the affected packages.
dev-libs/openssl to version: 1.0.2j

Gentoo Linux: All versions

dev-libs/openssl: before 1.0.2j

• cpe:2.3:o:gentoo:gentoo_linux:*:*:*:*:*:*:*:*
• cpe:2.3:a:gentoo:dev-libs_openssl:*:*:*:*:*:gentoo_linux:*:*

https://security.gentoo.org/glsa/201612-16

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) 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

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.

Update the affected packages.
dev-libs/openssl to version: 1.0.2j

Gentoo Linux: All versions

dev-libs/openssl: before 1.0.2j

• cpe:2.3:o:gentoo:gentoo_linux:*:*:*:*:*:*:*:*
• cpe:2.3:a:gentoo:dev-libs_openssl:*:*:*:*:*:gentoo_linux:*:*

https://security.gentoo.org/glsa/201612-16

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 Over-read

EUVDB-ID: #VU642

Risk: Low

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

CVE-ID: CVE-2016-2176

CWE-ID: CWE-126 - Buffer over-read

Exploit availability: No

The vulnerability allows a remote to cause buffer over-read on the target system.

The weakness exists due to overread in applications using the X509_NAME_oneline() function on EBCDIC systems. The vulnerability leads to arbitrary stack data return to the buffer.

Successful exploitation of the weakness results in buffer over-read on the vulnerable system.

Update the affected packages.
dev-libs/openssl to version: 1.0.2j

Gentoo Linux: All versions

dev-libs/openssl: before 1.0.2j

• cpe:2.3:o:gentoo:gentoo_linux:*:*:*:*:*:*:*:*
• cpe:2.3:a:gentoo:dev-libs_openssl:*:*:*:*:*:gentoo_linux:*:*

https://security.gentoo.org/glsa/201612-16

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) Integer overflow in ssl3_get_client_hello()

EUVDB-ID: #VU24

Risk: Medium

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

CVE-ID: CVE-2016-2177

CWE-ID: CWE-119 - Memory corruption

Exploit availability: No

The vulnerability allows a remote attacker to cause denial of service conditions on the target system.
The vulnerability exists due to a boundary error in ssl3_get_client_hello() function. A remote attacker can cause integer overflow by sending specially crafted data and crash the service.
Successful exploitation of this vulnerability may cause the target service to crash.

Update the affected packages.
dev-libs/openssl to version: 1.0.2j

Gentoo Linux: All versions

dev-libs/openssl: before 1.0.2j

• cpe:2.3:o:gentoo:gentoo_linux:*:*:*:*:*:*:*:*
• cpe:2.3:a:gentoo:dev-libs_openssl:*:*:*:*:*:gentoo_linux:*:*

https://security.gentoo.org/glsa/201612-16

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) Observable discrepancy

EUVDB-ID: #VU1589

Risk: Low

CVSSv4.0: 1.1 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2016-2178

CWE-ID: CWE-203 - Observable discrepancy

Exploit availability: No

The vulnerability allows a local user to perform timing attack.

The vulnerability exists due to an error within the dsa_sign_setup() function in crypto/dsa/dsa_ossl.c. A local user can obtain a DSA private key via a timing side-channel attack.

Update the affected packages.
dev-libs/openssl to version: 1.0.2j

Gentoo Linux: All versions

dev-libs/openssl: before 1.0.2j

• cpe:2.3:o:gentoo:gentoo_linux:*:*:*:*:*:*:*:*
• cpe:2.3:a:gentoo:dev-libs_openssl:*:*:*:*:*:gentoo_linux:*:*

https://security.gentoo.org/glsa/201612-16

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.

9) Out-of-bounds read

EUVDB-ID: #VU308

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-2016-2180

CWE-ID: CWE-125 - Out-of-bounds read

Exploit availability: No

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

The vulnerability exists due to a boundary condition within the TS_OBJ_print_bio() function in crypto/ts/ts_lib.c in the X.509 Public Key Infrastructure Time-Stamp Protocol (TSP) implementation in OpenSSL. A remote attacker can perform a denial of service (DoS) attack via a crafted time-stamp file that is mishandled by the "openssl ts" command.

Update the affected packages.
dev-libs/openssl to version: 1.0.2j

Gentoo Linux: All versions

dev-libs/openssl: before 1.0.2j

• cpe:2.3:o:gentoo:gentoo_linux:*:*:*:*:*:*:*:*
• cpe:2.3:a:gentoo:dev-libs_openssl:*:*:*:*:*:gentoo_linux:*:*

https://security.gentoo.org/glsa/201612-16

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.

10) Information disclosure

EUVDB-ID: #VU370

Risk: Low

CVSSv4.0: 6.9 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:P/U:Clear]

CVE-ID: CVE-2016-2183

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

Exploit availability: No

The vulnerability allows a remote attacker to decrypt transmitted data.

The vulnerability exists due to remote user's ability to control the network and capture long duration 3DES CBC mode encrypted session during which he can see a part of the text. In case of repeated sending the attacker can read the part and reconstruct the whole text.

Successful exploitation of this vulnerability may allow a remote attacker to decode transmitted data. This vulnerability is known as SWEET32.

Update the affected packages.
dev-libs/openssl to version: 1.0.2j

Gentoo Linux: All versions

dev-libs/openssl: before 1.0.2j

• cpe:2.3:o:gentoo:gentoo_linux:*:*:*:*:*:*:*:*
• cpe:2.3:a:gentoo:dev-libs_openssl:*:*:*:*:*:gentoo_linux:*:*

https://security.gentoo.org/glsa/201612-16

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.

11) Denial of service

EUVDB-ID: #VU819

Risk: Low

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:Clear]

CVE-ID: CVE-2016-6304

CWE-ID: CWE-400 - Resource exhaustion

Exploit availability: No

The vulnerability allows a remote unauthenticated user to cause DoS conditions on the target system.
The weakness is due to insufficient validation of input length. By sending messages with excessive length attackers can cause resource exhaustion that leads to denial of service
Successful exploitation of the vulnerability allows a malicious user to trigger the vulnerable service to deny.

Update the affected packages.
dev-libs/openssl to version: 1.0.2j

Gentoo Linux: All versions

dev-libs/openssl: before 1.0.2j

• cpe:2.3:o:gentoo:gentoo_linux:*:*:*:*:*:*:*:*
• cpe:2.3:a:gentoo:dev-libs_openssl:*:*:*:*:*:gentoo_linux:*:*

https://security.gentoo.org/glsa/201612-16

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.

12) Resource exhaustion

EUVDB-ID: #VU646

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-2016-6304

CWE-ID: CWE-400 - Resource exhaustion

Exploit availability: No

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

The vulnerability exists due to improper resource management in OCSP stapling implementation in OpenSSL. A remote attacker can multiple requests with a large OCSP Status Request extension and consume all available memory on the system.

Update the affected packages.
dev-libs/openssl to version: 1.0.2j

Gentoo Linux: All versions

dev-libs/openssl: before 1.0.2j

• cpe:2.3:o:gentoo:gentoo_linux:*:*:*:*:*:*:*:*
• cpe:2.3:a:gentoo:dev-libs_openssl:*:*:*:*:*:gentoo_linux:*:*

https://security.gentoo.org/glsa/201612-16

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.

13) Denial of service

EUVDB-ID: #VU820

Risk: Low

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:Clear]

CVE-ID: CVE-2016-6305

CWE-ID: CWE-120 - Buffer overflow

Exploit availability: No

The vulnerability allows a remote unauthenticated user to cause DoS conditions on the vulnerable system.
The weakness is due to flaw in handling of SSL/TLS protocol during a call to SSL_peek(). By sending an empty record attackers can trigger the affected service hang or deny.
Successful exploitation of the vulnerability will result in denial of service on the vulnerable system.

Update the affected packages.
dev-libs/openssl to version: 1.0.2j

Gentoo Linux: All versions

dev-libs/openssl: before 1.0.2j

• cpe:2.3:o:gentoo:gentoo_linux:*:*:*:*:*:*:*:*
• cpe:2.3:a:gentoo:dev-libs_openssl:*:*:*:*:*:gentoo_linux:*:*

https://security.gentoo.org/glsa/201612-16

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.

14) Denial of service

EUVDB-ID: #VU645

Risk: Low

CVSSv4.0: 1.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2016-6305

CWE-ID: CWE-371 - State Issues

Exploit availability: No

The vulnerability allows a remote authenticated user to trigger denial of service on the target system.
The weakness exists due to state error. By sendidng specially crafted files attackers can cause a flaw in SSL_peek() that may lead to the affected service hanging.
Successful exploitation of the vulnerability results in denial of service on the vulnerable system.

Update the affected packages.
dev-libs/openssl to version: 1.0.2j

Gentoo Linux: All versions

dev-libs/openssl: before 1.0.2j

• cpe:2.3:o:gentoo:gentoo_linux:*:*:*:*:*:*:*:*
• cpe:2.3:a:gentoo:dev-libs_openssl:*:*:*:*:*:gentoo_linux:*:*

https://security.gentoo.org/glsa/201612-16

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

15) Denial of service

EUVDB-ID: #VU816

Risk: Low

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:Clear]

CVE-ID: CVE-2016-6306

CWE-ID: CWE-125 - Out-of-bounds read

Exploit availability: No

The vulnerability allows a remote unauthenticated user to cause DoS conditions on the target system.
The weakess exists due insufficient length validation of certain TLS/SSL protocol handshake messages. By causing out-of-bounds read error attackers can trigger the affected service deny.
Successful exploitation of the vulnerability will result in denial of service on the vulnerable system.

Update the affected packages.
dev-libs/openssl to version: 1.0.2j

Gentoo Linux: All versions

dev-libs/openssl: before 1.0.2j

• cpe:2.3:o:gentoo:gentoo_linux:*:*:*:*:*:*:*:*
• cpe:2.3:a:gentoo:dev-libs_openssl:*:*:*:*:*:gentoo_linux:*:*

https://security.gentoo.org/glsa/201612-16

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.

16) Missing CRL sanity check

EUVDB-ID: #VU660

Risk: Medium

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

CVE-ID: CVE-2016-7052

CWE-ID: CWE-476 - NULL Pointer Dereference

Exploit availability: No

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

The vulnerability exists due to incorrect implementation of CRL sanity check in version 1.0.2i. Any attempt to use CRLs results in null pointe exception and crashes the process.

Update the affected packages.
dev-libs/openssl to version: 1.0.2j

Gentoo Linux: All versions

dev-libs/openssl: before 1.0.2j

• cpe:2.3:o:gentoo:gentoo_linux:*:*:*:*:*:*:*:*
• cpe:2.3:a:gentoo:dev-libs_openssl:*:*:*:*:*:gentoo_linux:*:*

https://security.gentoo.org/glsa/201612-16

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.