Out-of-bounds Read in F5 Big-Ip Access Policy Manager
CVE-2018-16890
libcurl versions from 7.36.0 to before 7.64.0 is vulnerable to a heap buffer out-of-bounds read. The function handling incoming NTLM type-2 messages (`lib/vauth/ntlm.c:ntlm_decode_type2_target`) does not validate incoming data correctly and is subject to an integer overflow vulnerability. Using that overflow, a malicious or broken NTLM server could trick libcurl to accept a bad length + offset combination that would lead to a buffer read out-of-bounds.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.054 (92.5th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 93rd percentile — 92.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.054 · newest: 0.054 · change: 0.000
Affected products
- F5 Big-Ip Access Policy Manager
- Haxx Libcurl
- NetApp Clustered Data Ontap
- Oracle Communications Operations Monitor — versions 3.4, 4.0
- Oracle HTTP Server — versions 12.2.1.3.0
- Oracle Secure Global Desktop — versions 5.4
- Siemens Sinema Remote Connect Client
- The Curl Project — versions 7.64.0
- Canonical Ubuntu Linux — versions 14.04, 16.04, 18.04
- Debian Linux — versions 9.0
Weakness classification (CWE)
Public proof-of-concept exploits
References
- www.debian.org/security/2019/dsa-4386 (vendor-advisory, Third Party Advisory)
- www.securityfocus.com/bid/106947 (VDB Entry, Third Party Advisory, vdb-entry)
- curl.haxx.se/docs/CVE-2018-16890.html (Patch, Vendor Advisory)
- security.netapp.com/advisory/ntap-20190315-0001/ (Patch, Third Party Advisory)
- usn.ubuntu.com/3882-1/ (vendor-advisory, Third Party Advisory)
- bugzilla.redhat.com/show_bug.cgi (Patch, Third Party Advisory, Mitigation, Issue Tracking)
- lists.apache.org/thread.html/8338a0f605bdbb3a6098bb76f666a95fc2b2f53f37fa1ecc89… (mailing-list)
- cert-portal.siemens.com/productcert/pdf/ssa-436177.pdf (Third Party Advisory)
- www.oracle.com/technetwork/security-advisory/cpuapr2019-5072813.html (Patch, Third Party Advisory)
- www.oracle.com/technetwork/security-advisory/cpujul2019-5072835.html (Patch, Third Party Advisory)
Frequently asked questions
- What is CVE-2018-16890?
- CVE-2018-16890 is a high-severity vulnerability in F5 Big-Ip Access Policy Manager, classified under Out-of-bounds Read. CVSS score: 7.5/10. Published 2019-02-06.
- How severe is CVE-2018-16890?
- High severity. CVSS v3 base score is 7.5 out of 10.
- Is CVE-2018-16890 known to be exploited?
- 9 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.