Out-of-bounds Read in Haxx Curl
CVE-2016-9953
The verify_certificate function in lib/vtls/schannel.c in libcurl 7.30.0 through 7.51.0, when built for Windows CE using the schannel TLS backend, allows remote attackers to obtain sensitive information, cause a denial of service (crash), or possibly have unspecified other impact via a wildcard certificate name, which triggers an out-of-bounds read.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.018 (77.6th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 78th percentile — 77.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.018 · newest: 0.018 · change: 0.000
Affected products
Weakness classification (CWE)
Public proof-of-concept exploits
References
- curl.haxx.se/CVE-2016-9952.patch (Vendor Advisory)
- curl.haxx.se/docs/adv_20161221C.html (Vendor Advisory)
Frequently asked questions
- What is CVE-2016-9953?
- CVE-2016-9953 is a critical-severity vulnerability in Haxx Curl, classified under Out-of-bounds Read. CVSS score: 9.8/10. Published 2018-03-12.
- How severe is CVE-2016-9953?
- Critical severity. CVSS v3 base score is 9.8 out of 10.
- Is CVE-2016-9953 known to be exploited?
- 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.