High severity · published Feb 26, 2019
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)+'…
7.5
CVSS
5.8%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)5.8% · higher than 93% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
CB
Cloud Backup · Netapp
All versions, or not specified · source: NVD
GL
Glibc · Gnu
through 2.29 · source: NVD
OS
Ontap Select Deploy Administration Utility · Netapp
All versions, or not specified · source: NVD
SC
Steelstore Cloud Integrated Storage · Netapp
All versions, or not specified · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2018-20796
CVE.org
https://www.cve.org/CVERecord?id=CVE-2018-20796
Third Party Advisory
http://www.securityfocus.com/bid/107160
Exploit
https://debbugs.gnu.org/cgi/bugreport.cgi?bug=34141
Exploit
https://lists.gnu.org/archive/html/bug-gnulib/2019-01/msg00108.html
Patch
https://security.netapp.com/advisory/ntap-20190315-0002/
support.f5.com
https://support.f5.com/csp/article/K26346590?utm_source=f5support&%3Butm_medium=RSS
More from Glibc
7.8
CVE-2023-4911
Glibc: buffer overflow in ld.so leading to privilege escalation
9.8
CVE-2026-5450
scanf %mc off-by-one heap buffer overflow
9.8
CVE-2023-0687
A vulnerability was found in GNU C Library 2.38
9.8
CVE-2023-25139
sprintf in the GNU C Library (glibc) 2.37 has a buffer overflow (out-of-bounds write) in some situations with a correct buffer size
9.8
CVE-2022-23218
The deprecated compatibility function svcunix_create in the sunrpc module of the GNU C Library (aka glibc) through 2.34 copies its path argument on the stack without validating…