SB2022051846 - Cloud Foundry Foundation cflinuxfs3 update for libpcre
Published: May 18, 2022
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 3 vulnerabilities.
1) Out-of-bounds read (CVE-ID: CVE-2019-20838)
CWE-ID: CWE-125 - Out-of-bounds read
CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green
The vulnerability allows a remote non-authenticated attacker to perform a denial of service (DoS) attack.
libpcre in PCRE before 8.43 allows a subject buffer over-read in JIT when UTF is disabled, and X or R has more than one fixed quantifier, a related issue to CVE-2019-20454.
2) Out-of-bounds read (CVE-ID: CVE-2019-20454)
CWE-ID: CWE-125 - Out-of-bounds read
CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green
The vulnerability allows a remote attacker to gain access to perform denial of service (DoS) attack.
The vulnerability exists due to a boundary condition in the "do_extuni_no_utf in pcre2_jit_compile.c" file when the pattern X is JIT compiled and used to match specially crafted subjects in non-UTF mode. A remote attacker can trigger out-of-bounds read error and crash the affected application.
3) Integer overflow (CVE-ID: CVE-2020-14155)
CWE-ID: CWE-190 - Integer overflow
CVSSv4: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber
The vulnerability allows a remote attacker to execute arbitrary code on the target system.
The vulnerability exists due to integer overflow. A remote attacker can pass a large number after a (?C substring, trigger integer overflow and execute arbitrary code on the target system.
Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.
Remediation
Install update from vendor's website.