Out-of-bounds Read in Haproxy
CVE-2018-20102
An out-of-bounds read in dns_validate_dns_response in dns.c was discovered in HAProxy through 1.8.14. Due to a missing check when validating DNS responses, remote attackers might be able read the 16 bytes corresponding to an AAAA record from the non-initialized part of the buffer, possibly accessing anything that was left on the stack, or even past the end of the 8193-byte buffer, depending on the value of accepted_payload_size.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.
EPSS exploit prediction
EPSS: 0.042 (90.5th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 91st percentile — 90.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.043 · newest: 0.042 · change: -0.002
Affected products
- Haproxy
- Canonical Ubuntu Linux — versions 16.04, 18.04, 18.10
- Red Hat Openshift Container Platform — versions 3.11
Weakness classification (CWE)
References
- git.haproxy.org/
- usn.ubuntu.com/3858-1/ (vendor-advisory, Third Party Advisory)
- access.redhat.com/errata/RHBA-2019:0326 (vendor-advisory, Third Party Advisory)
- www.securityfocus.com/bid/106223 (VDB Entry, Third Party Advisory, vdb-entry)
- access.redhat.com/errata/RHBA-2019:0327 (vendor-advisory, Third Party Advisory)
- access.redhat.com/errata/RHSA-2019:1436 (vendor-advisory)
- lists.debian.org/debian-lts-announce/2022/05/msg00045.html (mailing-list)
Frequently asked questions
- What is CVE-2018-20102?
- CVE-2018-20102 is a high-severity vulnerability in Haproxy, classified under Out-of-bounds Read. CVSS score: 7.5/10. Published 2018-12-12.
- How severe is CVE-2018-20102?
- High severity. CVSS v3 base score is 7.5 out of 10.