Vulnerability in GNU Glibc
CVE-2018-20796
In the GNU C Library (aka glibc or libc6) through 2.29, check_dst_limits_calc_pos_1 in posix/regexec.c has Uncontrolled Recursion, as demonstrated by '(\227|)(\\1\\1|t1|\\\2537)+' in grep.
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: 0.058 (92.8th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 93rd percentile — 92.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.058 · newest: 0.058 · change: 0.000
Affected products
Weakness classification (CWE)
Public proof-of-concept exploits
References
- security.netapp.com/advisory/ntap-20190315-0002/ (Patch, Third Party Advisory)
- lists.gnu.org/archive/html/bug-gnulib/2019-01/msg00108.html (Exploit, Mailing List, Vendor Advisory)
- www.securityfocus.com/bid/107160 (VDB Entry, Third Party Advisory, vdb-entry)
- debbugs.gnu.org/cgi/bugreport.cgi (Exploit, Mailing List, Vendor Advisory)
- support.f5.com/csp/article/K26346590
Frequently asked questions
- What is CVE-2018-20796?
- CVE-2018-20796 is a high-severity vulnerability in GNU Glibc, classified under Uncontrolled Recursion. CVSS score: 7.5/10. Published 2019-02-26.
- How severe is CVE-2018-20796?
- High severity. CVSS v3 base score is 7.5 out of 10.
- Is CVE-2018-20796 known to be exploited?
- 28 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.