Ubuntu update for HAProxy



| Updated: 2019-01-22
Risk Medium
Patch available YES
Number of vulnerabilities 3
CVE-ID CVE-2018-20102
CVE-2018-20103
CVE-2018-20615
CWE-ID CWE-125
CWE-835
Exploitation vector Network
Public exploit N/A
Vulnerable software
 haproxy (Ubuntu package)
Operating systems & Components / Operating system package or component

Vendor Canonical Ltd.

Security Bulletin

This security bulletin contains information about 3 vulnerabilities.

1) Out-of-bounds read

EUVDB-ID: #VU16548

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-2018-20102

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

Exploit availability: No

Description

The vulnerability allows a remote attacker to obtain potentially sensitive information on the target system.

The vulnerability exists due to improper checking of valid DNS responses by the dns_validate_dns_response function, as defined in the dns.c source code file. A remote attacker can send a specially crafted request that submits malicious input, trigger an out-of-bounds read access and obtain sensitive information.

Mitigation

Update the affected packages.

Ubuntu 18.10
haproxy - 1.8.13-2ubuntu0.1
Ubuntu 18.04 LTS
haproxy - 1.8.8-1ubuntu0.3
Ubuntu 16.04 LTS
haproxy - 1.6.3-1ubuntu0.2

Vulnerable software versions

haproxy (Ubuntu package): 1.6.3-1ubuntu0.1 - 1.8.8-1ubuntu0.2

CPE2.3 External links

https://usn.ubuntu.com/3858-1/


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) Infinite loop

EUVDB-ID: #VU16547

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-2018-20103

CWE-ID: CWE-835 - Loop with Unreachable Exit Condition ('Infinite Loop')

Exploit availability: No

Description

The vulnerability allows a remote attacker to cause DoS condition on the target system.

The vulnerability exists in the dns_read_name() function, as defined in the src/dns.c source code file due to an error when processing malicious input. A remote attacker can send a specially crafted packet that submits malicious input, make a compressed pointer point to itself trigger an infinite loop and cause the affected software to crash.

Mitigation

Update the affected packages.

Ubuntu 18.10
haproxy - 1.8.13-2ubuntu0.1
Ubuntu 18.04 LTS
haproxy - 1.8.8-1ubuntu0.3
Ubuntu 16.04 LTS
haproxy - 1.6.3-1ubuntu0.2

Vulnerable software versions

haproxy (Ubuntu package): 1.6.3-1ubuntu0.1 - 1.8.8-1ubuntu0.2

CPE2.3 External links

https://usn.ubuntu.com/3858-1/


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) Out-of-bounds read

EUVDB-ID: #VU17107

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-2018-20615

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

Exploit availability: No

Description

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

The vulnerability exists due to incorrect frame length validation when processing headers with priority flags set. A remote attacker can send a specially crafted HTTP/2 request, trigger our-of-bounds read and crash the affected application.

Mitigation

Update the affected packages.

Ubuntu 18.10
haproxy - 1.8.13-2ubuntu0.1
Ubuntu 18.04 LTS
haproxy - 1.8.8-1ubuntu0.3
Ubuntu 16.04 LTS
haproxy - 1.6.3-1ubuntu0.2

Vulnerable software versions

haproxy (Ubuntu package): 1.6.3-1ubuntu0.1 - 1.8.8-1ubuntu0.2

CPE2.3 External links

https://usn.ubuntu.com/3858-1/


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.



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