CVE-2018-20796
UnknownEPSS 5.80%
Last modified
CVE-2018-20796 is a vulnerability of currently unknown severity. 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.. EPSS estimates a 5.80% chance of exploitation in the next 30 days.
Description
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.
Metrics
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Gnu | Glibc | <= 2.29 |
| Netapp | Cloud Backup | All versions |
| Netapp | Ontap Select Deploy Administration Utility | All versions |
| Netapp | Steelstore Cloud Integrated Storage | All versions |
References
- http://www.securityfocus.com/bid/107160Third Party Advisory, VDB Entry
- https://debbugs.gnu.org/cgi/bugreport.cgi?bug=34141Exploit, Mailing List, Vendor Advisory
- https://lists.gnu.org/archive/html/bug-gnulib/2019-01/msg00108.htmlExploit, Mailing List, Vendor Advisory
- https://security.netapp.com/advisory/ntap-20190315-0002/Patch, Third Party Advisory
- http://www.securityfocus.com/bid/107160Third Party Advisory, VDB Entry
- https://debbugs.gnu.org/cgi/bugreport.cgi?bug=34141Exploit, Mailing List, Vendor Advisory
- https://lists.gnu.org/archive/html/bug-gnulib/2019-01/msg00108.htmlExploit, Mailing List, Vendor Advisory
- https://security.netapp.com/advisory/ntap-20190315-0002/Patch, Third Party Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is 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.
How severe is CVE-2018-20796?
Severity scoring for CVE-2018-20796 is pending analysis. The EPSS model estimates a 5.80% probability of exploitation in the next 30 days.
How do I fix CVE-2018-20796?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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Are you affected by CVE-2018-20796?
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