Vulnerability Report

CVE-2019-20454

Title: Pcre Pcre2 Memory Corruption

Memory Corruption

Proof Of Concept

No public PoC currently indexed for CVE-2019-20454.

CWE Category CWE-125
Published Date Feb 14, 2020
Modified Date Nov 21, 2024
Exploit Status Not Found
Score 7.5 CVSS v3.1
Exploit Probability (EPSS)
1.56%

Vulnerability Summary

CVE-2019-20454: An out-of-bounds read was discovered in PCRE before 10.34 when the pattern \X is JIT compiled and used to match specially crafted subjects in non-UTF mode. Applications that use PCRE to parse untrusted input may be vulnerable to this flaw, which would allow an attacker to crash the application. The flaw occurs in do_extuni_no_utf in pcre2_jit_compile.c.

Impacted Vendors

P
pcre 1
S
splunk 1

Reference Links

https://bugs.exim.org/show_bug.cgi?id=2421 https://bugs.php.net/bug.php?id=78338 https://bugzilla.redhat.com/show_bug.cgi?id=1735494 https://lists.debian.org/debian-lts-announce/2023/03/msg00014.html https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/OQRAHYHLRNMBTPR3KXVM27NSZP3KTOPI/ https://security.gentoo.org/glsa/202006-16 https://vcs.pcre.org/pcre2?view=revision&revision=1092 https://bugs.exim.org/show_bug.cgi?id=2421 https://bugs.php.net/bug.php?id=78338 https://bugzilla.redhat.com/show_bug.cgi?id=1735494 https://lists.debian.org/debian-lts-announce/2023/03/msg00014.html https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/OQRAHYHLRNMBTPR3KXVM27NSZP3KTOPI/ https://security.gentoo.org/glsa/202006-16 https://vcs.pcre.org/pcre2?view=revision&revision=1092
CVSS v3.1
Source Entity [email protected]
Severity HIGH
7.5
Attack Vector
NETWORK
Complexity
LOW
Privileges
N/A
Interaction
NONE
Confidentiality
N/A
Integrity
N/A
Availability
N/A
Scope
UNCHANGED
RAW VECTOR CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS v3.0
Source Entity [email protected]
Severity MEDIUM
5.1
Attack Vector
LOCAL
Complexity
HIGH
Privileges
N/A
Interaction
NONE
Confidentiality
N/A
Integrity
N/A
Availability
N/A
Scope
UNCHANGED
RAW VECTOR CVSS:3.0/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS v2.0
Source Entity [email protected]
Severity MEDIUM
5.0
Access Vector
N/A
Authentication
N/A
RAW VECTOR AV:N/AC:L/Au:N/C:N/I:N/A:P

Associated Attack Patterns (CAPEC)

Total: Patterns

CVE-2019-20454 Exploits & PoCs (Proof Of Concept)

No public PoCs found in our database for this CVE.

MODIFIED

Vulnerability data or affected products updated.

PUBLISHED

Vulnerability first announced in NVD.

Attack Vector Matrix

Access Vector NETWORK
Complexity LOW
Privileges N/A
Interaction NONE
CVSS Vector String CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected Stack

No specific products linked.