# CVE-2019-19977: Memory corruption in n/a > A stack-based buffer over-read in libESMTP allows attackers to cause denial of service or disclose sensitive memory contents. - **Severity:** Critical 9.8 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H`) - **Exploited in the wild:** Not known - **Login needed:** Not needed - **Attackable:** Over the internet - **Victim action needed:** Not needed - **Fix available:** Yes - **Published:** 26 Dec 2019 - **Updated:** 5 Aug 2024 - **Also known as:** AZL-36949, AZL-7260, DEBIAN-CVE-2019-19977, GHSA-cxg8-9wrx-2mhp, MGASA-2021-0503, SUSE-SU-2021:14793-1, SUSE-SU-2021:2917-1, SUSE-SU-2021:2937-1, SUSE-SU-2021:2937-2, openSUSE-SU-2021:1235-1, openSUSE-SU-2021:2937-1, openSUSE-SU-2024:12594-1 ## What is CVE-2019-19977? CVE-2019-19977 is a critical memory corruption vulnerability in n/a, published on 26 Dec 2019. An attacker can exploit it over the internet without logging in, with no action from the victim. ### Official description libESMTP through 1.0.6 mishandles domain copying into a fixed-size buffer in ntlm_build_type_2 in ntlm/ntlmstruct.c, as demonstrated by a stack-based buffer over-read. Weakness: CWE-125 (Out-of-bounds Read) ## Which versions are affected by CVE-2019-19977? It affects 1 product. | Package | Ecosystem | Affected | Fixed in | | --- | --- | --- | --- | | `libesmtp` | SUSE:Enterprise Storage 6 | All versions | 1.0.6-150.4.1 | | `libesmtp` | SUSE:HPE Helion OpenStack 8 | All versions | 1.0.6-17.3.1 | | `libesmtp` | SUSE:Linux Enterprise High Performance Computing 15 SP1-ESPOS | All versions | 1.0.6-150.4.1 | | `libesmtp` | SUSE:Linux Enterprise High Performance Computing 15 SP1-LTSS | All versions | 1.0.6-150.4.1 | | `libesmtp` | SUSE:Linux Enterprise High Performance Computing 15-ESPOS | All versions | 1.0.6-150.4.1 | | `libesmtp` | SUSE:Linux Enterprise High Performance Computing 15-LTSS | All versions | 1.0.6-150.4.1 | | `libesmtp` | SUSE:Linux Enterprise Micro 5.0 | All versions | 1.0.6-150.4.1 | | `libesmtp` | SUSE:Linux Enterprise Micro 5.1 | All versions | 1.0.6-150.4.1 | | `libesmtp` | SUSE:Linux Enterprise Module for Basesystem 15 SP2 | All versions | 1.0.6-150.4.1 | | `libesmtp` | SUSE:Linux Enterprise Module for Basesystem 15 SP3 | All versions | 1.0.6-150.4.1 | | `libesmtp` | SUSE:Linux Enterprise Point of Sale 11 SP3 | All versions | 1.0.4-157.18.3.1 | | `libesmtp` | SUSE:Linux Enterprise Server 11 SP4-LTSS | All versions | 1.0.4-157.18.3.1 | | `libesmtp` | SUSE:Linux Enterprise Server 12 SP2-BCL | All versions | 1.0.6-17.3.1 | | `libesmtp` | SUSE:Linux Enterprise Server 12 SP3-BCL | All versions | 1.0.6-17.3.1 | | `libesmtp` | SUSE:Linux Enterprise Server 12 SP3-LTSS | All versions | 1.0.6-17.3.1 | | `libesmtp` | SUSE:Linux Enterprise Server 12 SP4-LTSS | All versions | 1.0.6-17.3.1 | | `libesmtp` | SUSE:Linux Enterprise Server 12 SP5 | All versions | 1.0.6-17.3.1 | | `libesmtp` | SUSE:Linux Enterprise Server 15 SP1-BCL | All versions | 1.0.6-150.4.1 | | `libesmtp` | SUSE:Linux Enterprise Server 15 SP1-LTSS | All versions | 1.0.6-150.4.1 | | `libesmtp` | SUSE:Linux Enterprise Server 15-LTSS | All versions | 1.0.6-150.4.1 | | `libesmtp` | SUSE:Linux Enterprise Server for SAP Applications 12 SP3 | All versions | 1.0.6-17.3.1 | | `libesmtp` | SUSE:Linux Enterprise Server for SAP Applications 12 SP4 | All versions | 1.0.6-17.3.1 | | `libesmtp` | SUSE:Linux Enterprise Server for SAP Applications 12 SP5 | All versions | 1.0.6-17.3.1 | | `libesmtp` | SUSE:Linux Enterprise Server for SAP Applications 15 | All versions | 1.0.6-150.4.1 | | `libesmtp` | SUSE:Linux Enterprise Server for SAP Applications 15 SP1 | All versions | 1.0.6-150.4.1 | | `libesmtp` | SUSE:Linux Enterprise Software Development Kit 12 SP5 | All versions | 1.0.6-17.3.1 | | `libesmtp` | SUSE:Manager Proxy 4.0 | All versions | 1.0.6-150.4.1 | | `libesmtp` | SUSE:Manager Retail Branch Server 4.0 | All versions | 1.0.6-150.4.1 | | `libesmtp` | SUSE:Manager Server 4.0 | All versions | 1.0.6-150.4.1 | | `libesmtp` | SUSE:OpenStack Cloud 8 | All versions | 1.0.6-17.3.1 | | `libesmtp` | SUSE:OpenStack Cloud 9 | All versions | 1.0.6-17.3.1 | | `libesmtp` | SUSE:OpenStack Cloud Crowbar 8 | All versions | 1.0.6-17.3.1 | | `libesmtp` | SUSE:OpenStack Cloud Crowbar 9 | All versions | 1.0.6-17.3.1 | | `libesmtp` | openSUSE:Leap 15.2 | All versions | 1.0.6-lp152.4.3.1 | | `libesmtp` | openSUSE:Leap 15.3 | All versions | 1.0.6-150.4.1 | | `libesmtp` | openSUSE:Tumbleweed | All versions | 1.1.0-1.1 | Products: Libesmtp Project Libesmtp. ## How do I fix CVE-2019-19977? Apply the vendor's patch. ## Is CVE-2019-19977 being exploited? There is no known exploitation of CVE-2019-19977 in the wild and no public exploit code. ## Fix prompt for AI coding agents ```text Check this codebase for CVE-2019-19977 and fix it if it is affected. What it is: CVE-2019-19977 is a critical memory corruption vulnerability in n/a, published on 26 Dec 2019. An attacker can exploit it over the internet without logging in, with no action from the victim. Exploitation: There is no known exploitation of CVE-2019-19977 in the wild and no public exploit code. Affected product: n/a. No package-level version data is available, so check the vendor advisory linked from the reference page. Task: 1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies. 2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it. 3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead. 4. Run the tests and summarise what changed and why. 5. If nothing in the project is affected, say so and change nothing. Reference: https://insights.sbomify.com/CVE-2019-19977/ (Markdown: https://insights.sbomify.com/CVE-2019-19977/index.md) ``` ## Sources - CVE record: https://www.cve.org/CVERecord?id=CVE-2019-19977 - NVD: https://nvd.nist.gov/vuln/detail/CVE-2019-19977 - OSV: https://osv.dev/vulnerability/CVE-2019-19977 --- From sbomify Insights: https://insights.sbomify.com/CVE-2019-19977/ Summaries are generated and may contain mistakes; the official description above is the record.