Buffer overflow in Pcre
CVE-2017-7186
libpcre1 in PCRE 8.40 and libpcre2 in PCRE2 10.23 allow remote attackers to cause a denial of service (segmentation violation for read access, and application crash) by triggering an invalid Unicode property lookup.
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:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.050 (92.2th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 92nd percentile — 92.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.050 · newest: 0.050 · change: 0.000
Affected products
- Pcre — versions 8.40
- Pcre Pcre2 — versions 10.23
Weakness classification (CWE)
Public proof-of-concept exploits
References
- bugs.exim.org/show_bug.cgi (Third Party Advisory)
- security.gentoo.org/glsa/201710-09 (vendor-advisory)
- vcs.pcre.org/pcre/code/trunk/pcre_internal.h (Patch)
- vcs.pcre.org/pcre2/code/trunk/src/pcre2_internal.h (Patch)
- vcs.pcre.org/pcre/code/trunk/pcre_ucd.c (Patch)
- www.securityfocus.com/bid/97030 (vdb-entry)
- blogs.gentoo.org/ago/2017/03/14/libpcre-invalid-memory-read-in-match-pcre_exec-… (Patch, Third Party Advisory)
- vcs.pcre.org/pcre2/code/trunk/src/pcre2_ucd.c (Patch)
- access.redhat.com/errata/RHSA-2018:2486 (vendor-advisory)
- security.gentoo.org/glsa/201710-25 (vendor-advisory)
Frequently asked questions
- What is CVE-2017-7186?
- CVE-2017-7186 is a high-severity vulnerability in Pcre, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 7.5/10. Published 2017-03-20.
- How severe is CVE-2017-7186?
- High severity. CVSS v3 base score is 7.5 out of 10.
- Is CVE-2017-7186 known to be exploited?
- 3 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.