Risk | Low |
Patch available | YES |
Number of vulnerabilities | 4 |
CVE-ID | CVE-2018-0732 CVE-2018-0734 CVE-2018-0737 CVE-2018-5407 |
CWE-ID | CWE-20 CWE-200 CWE-208 |
Exploitation vector | Network |
Public exploit | Public exploit code for vulnerability #4 is available. |
Vulnerable software Subscribe |
Debian Linux Operating systems & Components / Operating system |
Vendor | Debian |
Security Bulletin
This security bulletin contains information about 4 vulnerabilities.
EUVDB-ID: #VU13325
Risk: Low
CVSSv3.1: 6.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]
CVE-ID: CVE-2018-0732
CWE-ID:
CWE-20 - Improper input validation
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to cause DoS condition on the target system.
The vulnerability exists due to improper handling of large prime values by the affected software during key agreement operations in a Transport Layer Security (TLS) handshake using an Ephemeral Diffie-Hellman (DHE) based cipher suite. A remote attacker can send a large prime value from a malicious OpenSSL server to a targeted OpenSSL client and cause the client to stop responding while generating a key for the prime value.
MitigationUpdate the affected package to version: 1.0.2q-1~deb9u1
Vulnerable software versionsDebian Linux: All versions
External linkshttp://www.debian.org/security/2018/dsa-4355
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.
EUVDB-ID: #VU15668
Risk: Low
CVSSv3.1: 4.8 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C]
CVE-ID: CVE-2018-0734
CWE-ID:
CWE-200 - Information exposure
Exploit availability: No
DescriptionThe vulnerability allows a local attacker to obtain potentially sensitive information.
The vulnerability exists due to unspecified flaw in Digital Signature Algorithm (DSA). A local attacker can conduct a timing side-channel attack and recover the private key, which could be used to conduct further attacks.
MitigationUpdate the affected package to version: 1.0.2q-1~deb9u1
Vulnerable software versionsDebian Linux: All versions
External linkshttp://www.debian.org/security/2018/dsa-4355
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.
EUVDB-ID: #VU11854
Risk: Low
CVSSv3.1: 2.9 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N/E:U/RL:O/RC:C]
CVE-ID: CVE-2018-0737
CWE-ID:
CWE-200 - Information exposure
Exploit availability: No
DescriptionThe vulnerability allows a local attacker to obtain potentially sensitive information on the target system.
The weakness exists in the RSA key generation algorithm's BN_mod_inverse() and BN_mod_exp_mont() functions due to a cache timing side channel attack. A local attacker can recover the private key.
Update the affected package to version: 1.0.2q-1~deb9u1
Vulnerable software versionsDebian Linux: All versions
External linkshttp://www.debian.org/security/2018/dsa-4355
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.
EUVDB-ID: #VU15723
Risk: Low
CVSSv3.1: 4.4 [CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N/E:P/RL:U/RC:C]
CVE-ID: CVE-2018-5407
CWE-ID:
CWE-208 - Information Exposure Through Timing Discrepancy
Exploit availability: Yes
DescriptionThe vulnerability allows a physical attacker to obtain potentially sensitive information.
The vulnerability exists due to due to execution of engine sharing on SMT (e.g.Hyper-Threading) architectures when improper handling of information by the processor. A physical attacker can construct a timing side channel to hijack information from processes that are running in the same core.
Note: the vulnerability has been dubbed as PortSmash microarchitecture bug.
MitigationUpdate the affected package to version: 1.0.2q-1~deb9u1
Vulnerable software versionsDebian Linux: All versions
External linkshttp://www.debian.org/security/2018/dsa-4355
Q & A
Can this vulnerability be exploited remotely?
No. The attacker should have physical access to the system in order to successfully exploit this vulnerability.
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.