An issue was discovered in libgit2 before 0.28.4 and 0.9x before 0.99.0. checkout.c mishandles equivalent filenames that exist because of NTFS short names. This may allow remote code execution when cloning a repository. This issue is similar to CVE-2019-1353.

The remote Redhat Enterprise Linux 8 host has one or more packages installed that are affected by multiple vulnerabilities that have been acknowledged by the vendor but will not be patched.

  - libgit2: NTFS protections inactive when running Git in the Windows Subsystem for Linux (CVE-2020-12279)

  - An issue was discovered in libgit2 before 0.28.4 and 0.9x before 0.99.0. path.c mishandles equivalent     filenames that exist because of NTFS Alternate Data Streams. This may allow remote code execution when     cloning a repository. This issue is similar to CVE-2019-1352. (CVE-2020-12278)

Note that Nessus has not tested for these issues but has instead relied on the package manager's report that the package is installed.

The remote Redhat Enterprise Linux 7 host has one or more packages installed that are affected by multiple vulnerabilities that have been acknowledged by the vendor but will not be patched.

  - libgit2: NTFS protections inactive when running Git in the Windows Subsystem for Linux (CVE-2020-12279)

  - An issue was discovered in libgit2 before 0.28.4 and 0.9x before 0.99.0. path.c mishandles equivalent     filenames that exist because of NTFS Alternate Data Streams. This may allow remote code execution when     cloning a repository. This issue is similar to CVE-2019-1352. (CVE-2020-12278)

Note that Nessus has not tested for these issues but has instead relied on the package manager's report that the package is installed.

This plugin has been deprecated as it does not adhere to established standards for this style of check.

The remote Ubuntu 16.04 LTS / 18.04 LTS / 20.04 LTS / 22.04 LTS / 23.10 host has packages installed that are affected by multiple vulnerabilities as referenced in the USN-6678-1 advisory.

    It was discovered that libgit2 mishandled equivalent filenames on NTFS partitions. If a user or automated     system were tricked into cloning a specially crafted repository, an attacker could possibly use this issue     to execute arbitrary code. This issue only affected Ubuntu 16.04 LTS and Ubuntu 18.04 LTS.
    (CVE-2020-12278, CVE-2020-12279)

    It was discovered that libgit2 did not perform certificate checking by default. An attacker could possibly     use this issue to perform a machine-in-the-middle attack. This issue only affected Ubuntu 16.04 LTS,     Ubuntu 18.04 LTS, Ubuntu 20.04 LTS, and Ubuntu 22.04 LTS. (CVE-2023-22742)

    It was discovered that libgit2 could be made to run into an infinite loop. An attacker could possibly use     this issue to cause a denial of service. This issue only affected Ubuntu 23.10. (CVE-2024-24575)

    It was discovered that libgit2 did not properly manage memory. An attacker could possibly use this issue     to cause a denial of service or execute arbitrary code. (CVE-2024-24577)

Tenable has extracted the preceding description block directly from the Ubuntu security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Debian 10 host has packages installed that are affected by multiple vulnerabilities as referenced in the dla-3340 advisory.

  - An issue was discovered in libgit2 before 0.28.4 and 0.9x before 0.99.0. path.c mishandles equivalent     filenames that exist because of NTFS Alternate Data Streams. This may allow remote code execution when     cloning a repository. This issue is similar to CVE-2019-1352. (CVE-2020-12278)

  - An issue was discovered in libgit2 before 0.28.4 and 0.9x before 0.99.0. checkout.c mishandles equivalent     filenames that exist because of NTFS short names. This may allow remote code execution when cloning a     repository. This issue is similar to CVE-2019-1353. (CVE-2020-12279)

  - libgit2 is a cross-platform, linkable library implementation of Git. When using an SSH remote with the     optional libssh2 backend, libgit2 does not perform certificate checking by default. Prior versions of     libgit2 require the caller to set the `certificate_check` field of libgit2's `git_remote_callbacks`     structure - if a certificate check callback is not set, libgit2 does not perform any certificate checking.
    This means that by default - without configuring a certificate check callback, clients will not perform     validation on the server SSH keys and may be subject to a man-in-the-middle attack. Users are encouraged     to upgrade to v1.4.5 or v1.5.1. Users unable to upgrade should ensure that all relevant certificates are     manually checked. (CVE-2023-22742)

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Debian 9 host has packages installed that are affected by multiple vulnerabilities as referenced in the dla-2936 advisory.

  - A flaw was found in libgit2 before version 0.27.3. It has been discovered that an unexpected sign     extension in git_delta_apply function in delta.c file may lead to an integer overflow which in turn leads     to an out of bound read, allowing to read before the base object. An attacker may use this flaw to leak     memory addresses or cause a Denial of Service. (CVE-2018-10887)

  - A flaw was found in libgit2 before version 0.27.3. A missing check in git_delta_apply function in delta.c     file, may lead to an out-of-bound read while reading a binary delta file. An attacker may use this flaw to     cause a Denial of Service. (CVE-2018-10888)

  - In ng_pkt in transports/smart_pkt.c in libgit2 before 0.26.6 and 0.27.x before 0.27.4, a remote attacker     can send a crafted smart-protocol ng packet that lacks a '\0' byte to trigger an out-of-bounds read that     leads to DoS. (CVE-2018-15501)

  - Integer overflow in the index.c:read_entry() function while decompressing a compressed prefix length in     libgit2 before v0.26.2 allows an attacker to cause a denial of service (out-of-bounds read) via a crafted     repository index file. (CVE-2018-8098)

  - Incorrect returning of an error code in the index.c:read_entry() function leads to a double free in     libgit2 before v0.26.2, which allows an attacker to cause a denial of service via a crafted repository     index file. (CVE-2018-8099)

  - A remote code execution vulnerability exists when Git for Visual Studio improperly sanitizes input, aka     'Git for Visual Studio Remote Code Execution Vulnerability'. This CVE ID is unique from CVE-2019-1349,     CVE-2019-1350, CVE-2019-1354, CVE-2019-1387. (CVE-2019-1352)

  - An issue was found in Git before v2.24.1, v2.23.1, v2.22.2, v2.21.1, v2.20.2, v2.19.3, v2.18.2, v2.17.3,     v2.16.6, v2.15.4, and v2.14.6. When running Git in the Windows Subsystem for Linux (also known as WSL)     while accessing a working directory on a regular Windows drive, none of the NTFS protections were active.
    (CVE-2019-1353)

  - An issue was discovered in libgit2 before 0.28.4 and 0.9x before 0.99.0. path.c mishandles equivalent     filenames that exist because of NTFS Alternate Data Streams. This may allow remote code execution when     cloning a repository. This issue is similar to CVE-2019-1352. (CVE-2020-12278)

  - An issue was discovered in libgit2 before 0.28.4 and 0.9x before 0.99.0. checkout.c mishandles equivalent     filenames that exist because of NTFS short names. This may allow remote code execution when cloning a     repository. This issue is similar to CVE-2019-1353. (CVE-2020-12279)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

According to the versions of the libgit2 package installed, the EulerOS installation on the remote host is affected by the following vulnerabilities :

  - An issue was discovered in libgit2 before 0.28.4 and     0.9x before 0.99.0. path.c mishandles equivalent     filenames that exist because of NTFS Alternate Data     Streams. This may allow remote code execution when     cloning a repository. This issue is similar to     CVE-2019-1352.(CVE-2020-12278)

  - An issue was discovered in libgit2 before 0.28.4 and     0.9x before 0.99.0. checkout.c mishandles equivalent     filenames that exist because of NTFS short names. This     may allow remote code execution when cloning a     repository. This issue is similar to     CVE-2019-1353.(CVE-2020-12279)

Note that Tenable Network Security has extracted the preceding description block directly from the EulerOS security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

ID	Name	Product	Family	Severity
199617	RHEL 8 : libgit2 (Unpatched Vulnerability)	Nessus	Red Hat Local Security Checks	critical
199588	RHEL 7 : libgit2 (Unpatched Vulnerability)	Nessus	Red Hat Local Security Checks	critical
195757	RHEL 7 : libgit2 (Unpatched Vulnerability) (deprecated)	Nessus	Red Hat Local Security Checks	critical
195732	RHEL 8 : libgit2 (Unpatched Vulnerability) (deprecated)	Nessus	Red Hat Local Security Checks	critical
191559	Ubuntu 16.04 LTS / 18.04 LTS / 20.04 LTS / 22.04 LTS / 23.10 : libgit2 vulnerabilities (USN-6678-1)	Nessus	Ubuntu Local Security Checks	critical
171871	Debian DLA-3340-1 : libgit2 - LTS security update	Nessus	Debian Local Security Checks	critical
159090	Debian DLA-2936-1 : libgit2 - LTS security update	Nessus	Debian Local Security Checks	critical
139964	EulerOS 2.0 SP8 : libgit2 (EulerOS-SA-2020-1861)	Nessus	Huawei Local Security Checks	critical

Detections

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CVE-2020-12279

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