Ubuntu update for pcre2

1) Out-of-bounds read

EUVDB-ID: #VU63945

Risk: Medium

CVSSv4.0: 6.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2022-1586

CWE-ID: CWE-125 - Out-of-bounds read

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform a denial of service attack.

The vulnerability exists due to a boundary condition in the PCRE2 library in the compile_xclass_matchingpath() function of the pcre2_jit_compile.c file. A remote attacker can pass specially crafted data to the application, trigger out-of-bounds read error, gain access to sensitive information or perform a denial of service attack.

Mitigation

Update the affected package pcre2 to the latest version.

Vulnerable software versions

Ubuntu: 20.04 - 22.04

libpcre2-posix2 (Ubuntu package): before 10.34-7ubuntu0.1

libpcre2-8-0 (Ubuntu package): before 10.34-7ubuntu0.1

pcre2-utils (Ubuntu package): before 10.34-7ubuntu0.1

libpcre2-posix3 (Ubuntu package): before 10.39-3ubuntu0.1

libpcre2-32-0 (Ubuntu package): before 10.34-7ubuntu0.1

libpcre2-16-0 (Ubuntu package): before 10.34-7ubuntu0.1

CPE2.3

• cpe:2.3:o:canonical:ubuntu:20.04:*:*:*:*:*:*:*
• cpe:2.3:o:canonical:ubuntu:22.04:*:*:*:*:*:*:*
• cpe:2.3:o:canonical:libpcre2-posix2:*:*:*:*:*:ubuntu:*:*
• cpe:2.3:o:canonical:libpcre2-8-0_ubuntu_package:*:*:*:*:*:ubuntu:*:*
• cpe:2.3:o:canonical:pcre2-utils_ubuntu_package:*:*:*:*:*:ubuntu:*:*
• cpe:2.3:o:canonical:libpcre2-posix3_ubuntu_package:*:*:*:*:*:ubuntu:*:*
• cpe:2.3:o:canonical:libpcre2-32-0_ubuntu_package:*:*:*:*:*:ubuntu:*:*
• cpe:2.3:o:canonical:libpcre2-16-0_ubuntu_package:*:*:*:*:*:ubuntu:*:*

External links

https://ubuntu.com/security/notices/USN-5627-1

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.

2) Out-of-bounds read

EUVDB-ID: #VU65553

Risk: Medium

CVSSv4.0: 2.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2022-1587

CWE-ID: CWE-125 - Out-of-bounds read

Exploit availability: No

Description

The vulnerability allows a remote attacker to gain access to potentially sensitive information.

The vulnerability exists due to a boundary condition in the get_recurse_data_length() function in pcre2_jit_compile.c when handling recursions in JIT-compiled regular expressions. A remote attacker can pass specially crafted input to the affected application, trigger an out-of-bounds read error and read contents of memory on the system.

Mitigation

Update the affected package pcre2 to the latest version.

Vulnerable software versions

Ubuntu: 20.04 - 22.04

libpcre2-posix2 (Ubuntu package): before 10.34-7ubuntu0.1

libpcre2-8-0 (Ubuntu package): before 10.34-7ubuntu0.1

pcre2-utils (Ubuntu package): before 10.34-7ubuntu0.1

libpcre2-posix3 (Ubuntu package): before 10.39-3ubuntu0.1

libpcre2-32-0 (Ubuntu package): before 10.34-7ubuntu0.1

libpcre2-16-0 (Ubuntu package): before 10.34-7ubuntu0.1

CPE2.3

• cpe:2.3:o:canonical:libpcre2-posix2:*:*:*:*:*:ubuntu:*:*
• cpe:2.3:o:canonical:libpcre2-8-0_ubuntu_package:*:*:*:*:*:ubuntu:*:*
• cpe:2.3:o:canonical:pcre2-utils_ubuntu_package:*:*:*:*:*:ubuntu:*:*
• cpe:2.3:o:canonical:libpcre2-posix3_ubuntu_package:*:*:*:*:*:ubuntu:*:*
• cpe:2.3:o:canonical:libpcre2-32-0_ubuntu_package:*:*:*:*:*:ubuntu:*:*
• cpe:2.3:o:canonical:libpcre2-16-0_ubuntu_package:*:*:*:*:*:ubuntu:*:*

External links

https://ubuntu.com/security/notices/USN-5627-1

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.