Red Hat update for GnuTLS
| Risk | Low |
| Patch available | YES |
| Number of vulnerabilities | 7 |
| CVE-ID | CVE-2016-7444 CVE-2017-5334 CVE-2017-5335 CVE-2017-5336 CVE-2017-5337 CVE-2017-7507 CVE-2017-7869 |
| CWE-ID | CWE-20 CWE-415 CWE-119 CWE-121 CWE-122 CWE-476 |
| Exploitation vector | Network |
| Public exploit | N/A |
| Vulnerable software Subscribe |
Red Hat Enterprise Linux Server Operating systems & Components / Operating system |
| Vendor | Red Hat Inc. |
Security Bulletin
This security bulletin contains information about 7 vulnerabilities.
1) Security restrictions bypass
EUVDB-ID: #VU7655
Risk: Low
CVSSv3.1: 6.4 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:U/RL:O/RC:C]
CVE-ID: CVE-2016-7444
CWE-ID:
CWE-20 - Improper input validation
Exploit availability: No
DescriptionThe vulnerability allows a remote unauthenticated attacker to bypass security restrictions on the target system.
The weakness exists due to insufficient validation of the serial length of an OCSP response by the gnutls_ocsp_resp_check_crt function in the lib/x509/ocsp.c code. A remote attacker can bypass certificate validation and conduct further attacks.
Install update from vendor's website.
Vulnerable software versionsRed Hat Enterprise Linux Server: 7
External linkshttp://access.redhat.com/errata/RHSA-2017:2292
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) Double free
EUVDB-ID: #VU7656
Risk: Low
CVSSv3.1: 4.6 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:U/RL:O/RC:C]
CVE-ID: CVE-2017-5334
CWE-ID:
CWE-415 - Double Free
Exploit availability: No
DescriptionThe vulnerability allows a remote unauthenticated attacker to cause DoS condition on the target system.
The weakness exists due to insufficient validation of user-supplied input by the gnutls_x509_ext_import_proxy function. A remote attacker can send a specially crafted X.509 certificate with Proxy Certificate Information extension present, trigger double free error and cause the application to crash.
Successful exploitation of the vulnerability results in denial of service.
Install update from vendor's website.
Vulnerable software versionsRed Hat Enterprise Linux Server: 7
External linkshttp://access.redhat.com/errata/RHSA-2017:2292
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) Memory corruption
EUVDB-ID: #VU7657
Risk: Low
CVSSv3.1: 5.1 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:L/E:U/RL:O/RC:C]
CVE-ID: CVE-2017-5335
CWE-ID:
CWE-119 - Memory corruption
Exploit availability: No
DescriptionThe vulnerability allows a remote unauthenticated attacker to cause DoS condition on the target system.
The weakness exists due to insufficient error checking in the stream-reading functions. A remote attacker can send a specially crafted OpenPGP certificate, trigger memory corruption and cause the application to crash.
Successful exploitation of the vulnerability results in denial of service.
Install update from vendor's website.
Vulnerable software versionsRed Hat Enterprise Linux Server: 7
External linkshttp://access.redhat.com/errata/RHSA-2017:2292
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) Stack-based buffer overflow
EUVDB-ID: #VU7658
Risk: Low
CVSSv3.1: 5.1 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:L/E:U/RL:O/RC:C]
CVE-ID: CVE-2017-5336
CWE-ID:
CWE-121 - Stack-based buffer overflow
Exploit availability: No
DescriptionThe vulnerability allows a remote unauthenticated attacker to cause DoS condition on the target system.
The weakness exists due to improper processing of malicious OpenPGP certificates by the cdk_pk_get_keyid function. A remote attacker can send a specially crafted OpenPGP certificate, trigger stack-based buffer overflow and cause the application to crash.
Successful exploitation of the vulnerability results in denial of service.
Install update from vendor's website.
Vulnerable software versionsRed Hat Enterprise Linux Server: 7
External linkshttp://access.redhat.com/errata/RHSA-2017:2292
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) Heap-based buffer overflow
EUVDB-ID: #VU7660
Risk: Low
CVSSv3.1: 5.1 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:L/E:U/RL:O/RC:C]
CVE-ID: CVE-2017-5337
CWE-ID:
CWE-122 - Heap-based Buffer Overflow
Exploit availability: No
DescriptionThe vulnerability allows a remote unauthenticated attacker to cause DoS condition on the target system.
The weakness exists due to improper processing of malicious OpenPGP certificates by the read_attribute function. A remote attacker can send a specially crafted OpenPGP certificate, trigger heap-based buffer overflow and cause the application to crash.
Successful exploitation of the vulnerability results in denial of service.
Install update from vendor's website.
Vulnerable software versionsRed Hat Enterprise Linux Server: 7
External linkshttp://access.redhat.com/errata/RHSA-2017:2292
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) Null pointer dereference
EUVDB-ID: #VU7481
Risk: Medium
CVSSv3.1: 5.1 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:L/E:U/RL:O/RC:C]
CVE-ID: CVE-2017-7507
CWE-ID:
CWE-476 - NULL Pointer Dereference
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to cause DoS condition on the target system.
The weakness exists due to NULL pointer dereference while decoding a status response TLS extension with valid contents. A remote attacker can send specially crafted status_request extension in a ClientHello message to cause the GnuTLS server application to crash.
Successful exploitation of the vulnerability results in denial of service.
Install update from vendor's website.
Vulnerable software versionsRed Hat Enterprise Linux Server: 7
External linkshttp://access.redhat.com/errata/RHSA-2017:2292
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) Denial of service
EUVDB-ID: #VU7661
Risk: Medium
CVSSv3.1: 7.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H/E:U/RL:O/RC:C]
CVE-ID: CVE-2017-7869
CWE-ID:
CWE-119 - Memory corruption
Exploit availability: No
DescriptionThe vulnerability allows a remote unauthenticated attacker to cause Dos condition on the target system.
The weakness exists due to improper memory processing in the opencdk/read-packet.c of the cdk_pkt_read function. A remote attacker can send a specially crafted OpenPGP certificate, trigger buffer overflow, integer overflow or NULL pointer dereference and cause the server application to crash.
Successful exploitation of the vulnerability results in denial of service.
Install update from vendor's website.
Vulnerable software versionsRed Hat Enterprise Linux Server: 7
External linkshttp://access.redhat.com/errata/RHSA-2017:2292
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.
