# CVE-2020-12723: perl-IO-Zlib: Perl is a high-level programming language that is commonly used for system administration utilities and web programmi...

CVE-2020-12723 is fixed in 32 products on 1 platform, first by libperl5.26 5.26.1-6ubuntu0.5, released May 31, 2020. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2020-12723
- Priority: High
- CVSS: 7.5 (Moderate)
- EPSS: 0.0597
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: May 31, 2020

## Description

Perl is a high-level programming language that is commonly used for system administration utilities and web programming.  Security Fix(es):  * perl: corruption of intermediate language state of compiled regular expression due to recursive S_study_chunk() calls leads to DoS (CVE-2020-12723)  For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | libperl5.26 Ubuntu 18.04.6 LTS (bionic) | 5.26.1-6ubuntu0.5 | [libperl5.26 5.26.1-6ubuntu0.5](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-libperl5.26-5.26.1-6ubuntu0.5.md) | May 31, 2020 |
| Linux | libperl5.30 Ubuntu 20.04 LTS (focal) | 5.30.0-9ubuntu0.2 | [libperl5.30 5.30.0-9ubuntu0.2](https://patchblox.com/security/data/fix/linux/ubuntu-focal-libperl5.30-5.30.0-9ubuntu0.2.md) | May 31, 2020 |
| Linux | perl RHEL 8 | 4:5.26.3-417.el8_3 | [RHSA-2021:0557](https://patchblox.com/security/data/fix/linux/rhsa-2021-0557.md) | Feb 16, 2021 |
| Linux | perl Ubuntu 18.04.6 LTS (bionic) | 5.26.1-6ubuntu0.5 | [perl 5.26.1-6ubuntu0.5](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-perl-5.26.1-6ubuntu0.5.md) | May 31, 2020 |
| Linux | perl Ubuntu 20.04 LTS (focal) | 5.30.0-9ubuntu0.2 | [perl 5.30.0-9ubuntu0.2](https://patchblox.com/security/data/fix/linux/ubuntu-focal-perl-5.30.0-9ubuntu0.2.md) | May 31, 2020 |
| Linux | perl ol 8 | 4:5.26.3-417.el8_3 | [ELSA-2021-0557](https://patchblox.com/security/data/fix/linux/elsa-2021-0557.md) | Feb 18, 2021 |
| Linux | perl-Attribute-Handlers RHEL 8 | 0:0.99-417.el8_3 | [RHSA-2021:0557](https://patchblox.com/security/data/fix/linux/rhsa-2021-0557.md) | Feb 16, 2021 |
| Linux | perl-Attribute-Handlers ol 8 | 0:0.99-417.el8_3 | [ELSA-2021-0557](https://patchblox.com/security/data/fix/linux/elsa-2021-0557.md) | Feb 18, 2021 |
| Linux | perl-Devel-Peek RHEL 8 | 0:1.26-417.el8_3 | [RHSA-2021:0557](https://patchblox.com/security/data/fix/linux/rhsa-2021-0557.md) | Feb 16, 2021 |
| Linux | perl-Devel-Peek ol 8 | 0:1.26-417.el8_3 | [ELSA-2021-0557](https://patchblox.com/security/data/fix/linux/elsa-2021-0557.md) | Feb 18, 2021 |
| Linux | perl-Devel-SelfStubber RHEL 8 | 0:1.06-417.el8_3 | [RHSA-2021:0557](https://patchblox.com/security/data/fix/linux/rhsa-2021-0557.md) | Feb 16, 2021 |
| Linux | perl-Devel-SelfStubber ol 8 | 0:1.06-417.el8_3 | [ELSA-2021-0557](https://patchblox.com/security/data/fix/linux/elsa-2021-0557.md) | Feb 18, 2021 |
| Linux | perl-Errno RHEL 8 | 0:1.28-417.el8_3 | [RHSA-2021:0557](https://patchblox.com/security/data/fix/linux/rhsa-2021-0557.md) | Feb 16, 2021 |
| Linux | perl-Errno ol 8 | 0:1.28-417.el8_3 | [ELSA-2021-0557](https://patchblox.com/security/data/fix/linux/elsa-2021-0557.md) | Feb 18, 2021 |
| Linux | perl-ExtUtils-Embed RHEL 8 | 0:1.34-417.el8_3 | [RHSA-2021:0557](https://patchblox.com/security/data/fix/linux/rhsa-2021-0557.md) | Feb 16, 2021 |
| Linux | perl-ExtUtils-Embed ol 8 | 0:1.34-417.el8_3 | [ELSA-2021-0557](https://patchblox.com/security/data/fix/linux/elsa-2021-0557.md) | Feb 18, 2021 |
| Linux | perl-ExtUtils-Miniperl RHEL 8 | 0:1.06-417.el8_3 | [RHSA-2021:0557](https://patchblox.com/security/data/fix/linux/rhsa-2021-0557.md) | Feb 16, 2021 |
| Linux | perl-ExtUtils-Miniperl ol 8 | 0:1.06-417.el8_3 | [ELSA-2021-0557](https://patchblox.com/security/data/fix/linux/elsa-2021-0557.md) | Feb 18, 2021 |
| Linux | perl-IO RHEL 8 | 0:1.38-417.el8_3 | [RHSA-2021:0557](https://patchblox.com/security/data/fix/linux/rhsa-2021-0557.md) | Feb 16, 2021 |
| Linux | perl-IO ol 8 | 0:1.38-417.el8_3 | [ELSA-2021-0557](https://patchblox.com/security/data/fix/linux/elsa-2021-0557.md) | Feb 18, 2021 |
| Linux | perl-IO-Zlib RHEL 8 | 1:1.10-417.el8_3 | [RHSA-2021:0557](https://patchblox.com/security/data/fix/linux/rhsa-2021-0557.md) | Feb 16, 2021 |
| Linux | perl-IO-Zlib ol 8 | 1:1.10-417.el8_3 | [ELSA-2021-0557](https://patchblox.com/security/data/fix/linux/elsa-2021-0557.md) | Feb 18, 2021 |
| Linux | perl-Locale-Maketext-Simple RHEL 8 | 1:0.21-417.el8_3 | [RHSA-2021:0557](https://patchblox.com/security/data/fix/linux/rhsa-2021-0557.md) | Feb 16, 2021 |
| Linux | perl-Locale-Maketext-Simple ol 8 | 1:0.21-417.el8_3 | [ELSA-2021-0557](https://patchblox.com/security/data/fix/linux/elsa-2021-0557.md) | Feb 18, 2021 |
| Linux | perl-Math-Complex RHEL 8 | 0:1.59-417.el8_3 | [RHSA-2021:0557](https://patchblox.com/security/data/fix/linux/rhsa-2021-0557.md) | Feb 16, 2021 |
| Linux | perl-Math-Complex ol 8 | 0:1.59-417.el8_3 | [ELSA-2021-0557](https://patchblox.com/security/data/fix/linux/elsa-2021-0557.md) | Feb 18, 2021 |
| Linux | perl-Memoize RHEL 8 | 0:1.03-417.el8_3 | [RHSA-2021:0557](https://patchblox.com/security/data/fix/linux/rhsa-2021-0557.md) | Feb 16, 2021 |
| Linux | perl-Memoize ol 8 | 0:1.03-417.el8_3 | [ELSA-2021-0557](https://patchblox.com/security/data/fix/linux/elsa-2021-0557.md) | Feb 18, 2021 |
| Linux | perl-Module-Loaded RHEL 8 | 1:0.08-417.el8_3 | [RHSA-2021:0557](https://patchblox.com/security/data/fix/linux/rhsa-2021-0557.md) | Feb 16, 2021 |
| Linux | perl-Module-Loaded ol 8 | 1:0.08-417.el8_3 | [ELSA-2021-0557](https://patchblox.com/security/data/fix/linux/elsa-2021-0557.md) | Feb 18, 2021 |
| Linux | perl-Net-Ping RHEL 8 | 0:2.55-417.el8_3 | [RHSA-2021:0557](https://patchblox.com/security/data/fix/linux/rhsa-2021-0557.md) | Feb 16, 2021 |
| Linux | perl-Net-Ping ol 8 | 0:2.55-417.el8_3 | [ELSA-2021-0557](https://patchblox.com/security/data/fix/linux/elsa-2021-0557.md) | Feb 18, 2021 |
| Linux | perl-Pod-Html RHEL 8 | 0:1.22.02-417.el8_3 | [RHSA-2021:0557](https://patchblox.com/security/data/fix/linux/rhsa-2021-0557.md) | Feb 16, 2021 |
| Linux | perl-Pod-Html ol 8 | 0:1.22.02-417.el8_3 | [ELSA-2021-0557](https://patchblox.com/security/data/fix/linux/elsa-2021-0557.md) | Feb 18, 2021 |
| Linux | perl-SelfLoader RHEL 8 | 0:1.23-417.el8_3 | [RHSA-2021:0557](https://patchblox.com/security/data/fix/linux/rhsa-2021-0557.md) | Feb 16, 2021 |
| Linux | perl-SelfLoader ol 8 | 0:1.23-417.el8_3 | [ELSA-2021-0557](https://patchblox.com/security/data/fix/linux/elsa-2021-0557.md) | Feb 18, 2021 |
| Linux | perl-Test RHEL 8 | 0:1.30-417.el8_3 | [RHSA-2021:0557](https://patchblox.com/security/data/fix/linux/rhsa-2021-0557.md) | Feb 16, 2021 |
| Linux | perl-Test ol 8 | 0:1.30-417.el8_3 | [ELSA-2021-0557](https://patchblox.com/security/data/fix/linux/elsa-2021-0557.md) | Feb 18, 2021 |
| Linux | perl-Time-Piece RHEL 8 | 0:1.31-417.el8_3 | [RHSA-2021:0557](https://patchblox.com/security/data/fix/linux/rhsa-2021-0557.md) | Feb 16, 2021 |
| Linux | perl-Time-Piece ol 8 | 0:1.31-417.el8_3 | [ELSA-2021-0557](https://patchblox.com/security/data/fix/linux/elsa-2021-0557.md) | Feb 18, 2021 |
| Linux | perl-base Ubuntu 18.04.6 LTS (bionic) | 5.26.1-6ubuntu0.5 | [perl-base 5.26.1-6ubuntu0.5](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-perl-base-5.26.1-6ubuntu0.5.md) | May 31, 2020 |
| Linux | perl-base Ubuntu 20.04 LTS (focal) | 5.30.0-9ubuntu0.2 | [perl-base 5.30.0-9ubuntu0.2](https://patchblox.com/security/data/fix/linux/ubuntu-focal-perl-base-5.30.0-9ubuntu0.2.md) | May 31, 2020 |
| Linux | perl-debug Ubuntu 18.04.6 LTS (bionic) | 5.26.1-6ubuntu0.5 | [perl-debug 5.26.1-6ubuntu0.5](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-perl-debug-5.26.1-6ubuntu0.5.md) | May 31, 2020 |
| Linux | perl-debug Ubuntu 20.04 LTS (focal) | 5.30.0-9ubuntu0.2 | [perl-debug 5.30.0-9ubuntu0.2](https://patchblox.com/security/data/fix/linux/ubuntu-focal-perl-debug-5.30.0-9ubuntu0.2.md) | May 31, 2020 |
| Linux | perl-devel RHEL 8 | 4:5.26.3-417.el8_3 | [RHSA-2021:0557](https://patchblox.com/security/data/fix/linux/rhsa-2021-0557.md) | Feb 16, 2021 |
| Linux | perl-devel ol 8 | 4:5.26.3-417.el8_3 | [ELSA-2021-0557](https://patchblox.com/security/data/fix/linux/elsa-2021-0557.md) | Feb 18, 2021 |
| Linux | perl-interpreter RHEL 8 | 4:5.26.3-417.el8_3 | [RHSA-2021:0557](https://patchblox.com/security/data/fix/linux/rhsa-2021-0557.md) | Feb 16, 2021 |
| Linux | perl-interpreter ol 8 | 4:5.26.3-417.el8_3 | [ELSA-2021-0557](https://patchblox.com/security/data/fix/linux/elsa-2021-0557.md) | Feb 18, 2021 |
| Linux | perl-libnetcfg RHEL 8 | 4:5.26.3-417.el8_3 | [RHSA-2021:0557](https://patchblox.com/security/data/fix/linux/rhsa-2021-0557.md) | Feb 16, 2021 |
| Linux | perl-libnetcfg ol 8 | 4:5.26.3-417.el8_3 | [ELSA-2021-0557](https://patchblox.com/security/data/fix/linux/elsa-2021-0557.md) | Feb 18, 2021 |
| Linux | perl-libs RHEL 8 | 4:5.26.3-417.el8_3 | [RHSA-2021:0557](https://patchblox.com/security/data/fix/linux/rhsa-2021-0557.md) | Feb 16, 2021 |
| Linux | perl-libs ol 8 | 4:5.26.3-417.el8_3 | [ELSA-2021-0557](https://patchblox.com/security/data/fix/linux/elsa-2021-0557.md) | Feb 18, 2021 |
| Linux | perl-macros RHEL 8 | 4:5.26.3-417.el8_3 | [RHSA-2021:0557](https://patchblox.com/security/data/fix/linux/rhsa-2021-0557.md) | Feb 16, 2021 |
| Linux | perl-macros ol 8 | 4:5.26.3-417.el8_3 | [ELSA-2021-0557](https://patchblox.com/security/data/fix/linux/elsa-2021-0557.md) | Feb 18, 2021 |
| Linux | perl-modules-5.26 Ubuntu 18.04.6 LTS (bionic) | 5.26.1-6ubuntu0.5 | [perl-modules-5.26 5.26.1-6ubuntu0.5](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-perl-modules-5.26-5.26.1-6ubuntu0.5.md) | May 31, 2020 |
| Linux | perl-modules-5.30 Ubuntu 20.04 LTS (focal) | 5.30.0-9ubuntu0.2 | [perl-modules-5.30 5.30.0-9ubuntu0.2](https://patchblox.com/security/data/fix/linux/ubuntu-focal-perl-modules-5.30-5.30.0-9ubuntu0.2.md) | May 31, 2020 |
| Linux | perl-open RHEL 8 | 0:1.11-417.el8_3 | [RHSA-2021:0557](https://patchblox.com/security/data/fix/linux/rhsa-2021-0557.md) | Feb 16, 2021 |
| Linux | perl-open ol 8 | 0:1.11-417.el8_3 | [ELSA-2021-0557](https://patchblox.com/security/data/fix/linux/elsa-2021-0557.md) | Feb 18, 2021 |
| Linux | perl-tests RHEL 8 | 4:5.26.3-417.el8_3 | [RHSA-2021:0557](https://patchblox.com/security/data/fix/linux/rhsa-2021-0557.md) | Feb 16, 2021 |
| Linux | perl-tests ol 8 | 4:5.26.3-417.el8_3 | [ELSA-2021-0557](https://patchblox.com/security/data/fix/linux/elsa-2021-0557.md) | Feb 18, 2021 |
| Linux | perl-utils RHEL 8 | 0:5.26.3-417.el8_3 | [RHSA-2021:0557](https://patchblox.com/security/data/fix/linux/rhsa-2021-0557.md) | Feb 16, 2021 |
| Linux | perl-utils ol 8 | 0:5.26.3-417.el8_3 | [ELSA-2021-0557](https://patchblox.com/security/data/fix/linux/elsa-2021-0557.md) | Feb 18, 2021 |

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