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Multiple vulnerabilities in libssh2 in F5 Networks Traffix SDC



Published: 2019-09-12
Severity Medium
Patch available NO
Number of vulnerabilities 2
CVE ID CVE-2019-3855
CVE-2019-13115
CWE ID CWE-190
Exploitation vector Network
Public exploit Public exploit code for vulnerability #2 is available.
Vulnerable software
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Traffix SDC
Client/Desktop applications / Software for system administration

Vendor F5 Networks, Inc.

Security Advisory

1) Integer overflow

Severity: Medium

CVSSv3: 6.5 [CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C] [PCI]

CVE-ID: CVE-2019-3855

CWE-ID: CWE-190 - Integer Overflow or Wraparound

Exploit availability: No

Description

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

The vulnerability exists due to integer overflow in the _libssh2_transport_read() function in transport.cwhen processing packet_lengthvalues. A remote attacker can trick the victim to connect to a malicious SSH server, trigger integer overflow and execute arbitrary code on the target system.

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

Mitigation

Cybersecurity Help is currently unaware of any official solution to address this vulnerability.

Vulnerable software versions

Traffix SDC: 5.0.0, 5.1.0

CPE External links

https://api-u.f5.com/support/kb-articles/K13322484?cacheFlag=false

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) Integer overflow

Severity: Medium

CVSSv3: 6.7 [CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C] [PCI]

CVE-ID: CVE-2019-13115

CWE-ID: CWE-190 - Integer Overflow or Wraparound

Exploit availability: Yes [Search exploit]

Description

The vulnerability allows a remote attacker to execute arbitrary code or cause a denial of service (DoS) condition on a targeted system.

The vulnerability exists due to integer overflow in the "kex_method_diffie_hellman_group_exchange_sha256_key_exchange" function in the "kex.c" file. A remote attacker can trick a victim to connect to an attacker-controlled Secure Shell (SSH) server, which would allow the attacker to send packets that submit malicious input to the targeted system, trigger integer overflow leading to an out-of-bounds write condition and execute arbitrary code or cause a DoS condition.


Mitigation

Cybersecurity Help is currently unaware of any official solution to address this vulnerability.

Vulnerable software versions

Traffix SDC: 5.0.0, 5.1.0

CPE External links

https://api-u.f5.com/support/kb-articles/K13322484?cacheFlag=false

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.