Description
libmspack 0.9.1alpha is affected by: Buffer Overflow. The impact is: Information Disclosure. The component is: function chmd_read_headers() in libmspack(file libmspack/mspack/chmd.c). The attack vector is: the victim must open a specially crafted chm file. The fixed version is: after commit 2f084136cfe0d05e5bf5703f3e83c6d955234b4d.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| libmspack | libmspack | 0.9.1alpha [fixed: after commit 2f084136cfe0d05e5bf5703f3e83c6d955234b4d] | — |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | libmspack | 0.10.1-1 | — |
| Debian 13 | libmspack | 0.10.1-1 | — |
| Debian 12 | libmspack | 0.10.1-1 | — |
| Debian 9 | libmspack | 0.5-1+deb9u4 | DLA-2805-1 |
| Debian 8 | libmspack | 0.5-1+deb8u4 | DLA-1895-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 20.04 LTS | libmspack | 0.10.1-1 | — |
| Ubuntu 18.04 LTS | libmspack | 0.6-3ubuntu0.3 | USN-4066-1 |
| Ubuntu 16.04 LTS | libmspack | 0.5-1ubuntu0.16.04.4 | USN-4066-1 |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 14.04 LTS | clamav | 0.100.3+dfsg-0ubuntu0.14.04.1+esm1 | USN-4066-2 |
| Ubuntu Pro 14.04 LTS | libmspack | 0.4-1ubuntu0.1~esm2 | USN-7788-1 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 8 | libmspack +1 | 0.7-0.3.alpha.el8.4 | RHSA-2020:1686 |
| RHEL 7 | libmspack +1 | 0.5-0.8.alpha.el7 | RHSA-2020:3848 |
AlmaLinux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux 8 | libmspack +1 | 0.7-0.3.alpha.el8.4 | ALSA-2020:1686 |
Rocky Linux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Rocky Linux 8 | libmspack | 0.7-0.3.alpha.el8.4 | RLSA-2020:1686 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP1 | libmspack | 0.6-3.8.19 | SUSE-SU-2020:1493-1 |
| SLES 12 SP5 | libmspack | 0.4-15.7.1 | SUSE-SU-2020:2711-1 |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 12 SP5 | libmspack | 0.4-15.7.1 | SUSE-SU-2020:2711-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Leap 15.1 | libmspack | 0.6-lp151.4.3.1 | openSUSE-SU-2020:0746-1 |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.24 | libmspack | 0.10.1_alpha-r0 | — |
| Alpine v3.23 | libmspack | 0.10.1_alpha-r0 | — |
| Alpine v3.22 | libmspack | 0.10.1_alpha-r0 | — |
| Alpine v3.21 | libmspack | 0.10.1_alpha-r0 | — |
| Alpine v3.20 | libmspack | 0.10.1_alpha-r0 | — |
Show 12 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.19 | libmspack | 0.10.1_alpha-r0 | — |
| Alpine v3.18 | libmspack | 0.10.1_alpha-r0 | — |
| Alpine v3.17 | libmspack | 0.10.1_alpha-r0 | — |
| Alpine v3.16 | libmspack | 0.10.1_alpha-r0 | — |
| Alpine v3.15 | libmspack | 0.10.1_alpha-r0 | — |
| Alpine v3.14 | libmspack | 0.10.1_alpha-r0 | — |
| Alpine v3.13 | libmspack | 0.10.1_alpha-r0 | — |
| Alpine v3.12 | libmspack | 0.10.1_alpha-r0 | — |
| Alpine v3.11 | libmspack | 0.10.1_alpha-r0 | — |
| Alpine v3.10 | libmspack | 0.8_alpha-r1 | — |
| Alpine v3.9 | libmspack | 0.8_alpha-r1 | — |
| Alpine v3.8 | libmspack | 0.8_alpha-r1 | — |
Amazon Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Amazon Linux 2 | libmspack +1 | 0.5-0.8.alpha.amzn2 | ALAS2-2020-1525 |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 8 | libmspack +1 | 0.7-0.3.alpha.el8.4 | ELSA-2020-1686 |
| Oracle Linux 7 | libmspack +1 | 0.5-0.8.alpha.el7 | ELSA-2020-3848 |
Advisories 16
- ALSA-2020:1686 Low: libmspack security and bug fix update AlmaLinux Security Advisories · Nov 5, 2026
- RHSA-2020:1686 Red Hat Security Advisory: libmspack security and bug fix update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- RHSA-2020:3848 Red Hat Security Advisory: libmspack security update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- USN-7788-1 libmspack vulnerabilities Ubuntu Security Notices (USN) · Apr 22, 2026
- USN-4066-2 clamav vulnerability Ubuntu Security Notices (USN) · Apr 22, 2026
- USN-4066-1 libmspack vulnerability Ubuntu Security Notices (USN) · Apr 22, 2026
- DLA-2805-1 libmspack - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DLA-1895-1 libmspack - security update Debian Security (DSA / DLA) · Mar 9, 2026
- RLSA-2020:1686 Low: libmspack security and bug fix update Rocky Linux Security Advisories · Feb 4, 2026
- SUSE-SU-2020:1493-1 Security update for libmspack SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2020:0746-1 Security update for libmspack SUSE / openSUSE Security Updates · Feb 4, 2026
- WID-SEC-2025-2180 Red Hat libmspack: Schwachstelle ermöglicht Offenlegung von Informationen BSI CERT-Bund (WID) · Oct 1, 2025
- SUSE-SU-2020:2711-1 Security update for libmspack SUSE / openSUSE Security Updates · May 2, 2025
- ALAS2-2020-1525 Low: libmspack security update (Amazon Linux 2) Amazon Linux Security Center (ALAS) · Oct 22, 2020
- ELSA-2020-3848 Low: libmspack security update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Oct 6, 2020
- ELSA-2020-1686 Low: libmspack security and bug fix update (Oracle Linux 8) Oracle Linux Security Advisories (ELSA) · May 5, 2020
References
- https://github.com/kyz/libmspack/issues/27
- https://github.com/kyz/libmspack/commit/2f084136cfe0d05e5bf5703f3e83c6d955234b4d
- USN-4066-1 vendor-advisory
- USN-4066-2 vendor-advisory
- FEDORA-2019-6235a32624 vendor-advisory
- FEDORA-2019-da6be81bd3 vendor-advisory
- [debian-lts-announce] 20190823 [SECURITY] [DLA 1895-1] libmspack security update mailing-list
- [debian-lts-announce] 20211031 [SECURITY] [DLA 2805-1] libmspack security update mailing-list