Ubuntu update for HAProxy
| 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 Subscribe |
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
CVSSv3.1: 4.6 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N/E:U/RL:O/RC:C]
CVE-ID: CVE-2018-20102
CWE-ID:
CWE-125 - Out-of-bounds read
Exploit availability: No
DescriptionThe 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.
MitigationUpdate 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
haproxy (Ubuntu package): 1.6.3-1ubuntu0.1 - 1.8.8-1ubuntu0.2
External linksQ & 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
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-2018-20103
CWE-ID:
CWE-835 - Loop with Unreachable Exit Condition ('Infinite Loop')
Exploit availability: No
DescriptionThe 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.
MitigationUpdate 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
haproxy (Ubuntu package): 1.6.3-1ubuntu0.1 - 1.8.8-1ubuntu0.2
External linksQ & 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
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-2018-20615
CWE-ID:
CWE-125 - Out-of-bounds read
Exploit availability: No
DescriptionThe 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.
MitigationUpdate 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
haproxy (Ubuntu package): 1.6.3-1ubuntu0.1 - 1.8.8-1ubuntu0.2
External linksQ & 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.
