#VU29116 Out-of-bounds read in PCRE2
Vulnerability identifier: #VU29116
Vulnerability risk: Medium
CVSSv3.1: 6.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]
CVE-ID:
CWE-ID:
CWE-125
Exploitation vector: Network
Exploit availability: No
Vulnerable software:
PCRE2
Universal components / Libraries /
Libraries used by multiple products
Vendor: PCRE
Description
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.
Mitigation
Install update from vendor's website.
Vulnerable software versions
PCRE2: 10.00 - 10.33
External links
http://bugs.exim.org/show_bug.cgi?id=2421
http://bugs.php.net/bug.php?id=78338
http://bugzilla.redhat.com/show_bug.cgi?id=1735494
http://security.gentoo.org/glsa/202006-16
http://vcs.pcre.org/pcre2?view=revision&revision=1092
Q & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
