The remote Oracle Linux 7 host has packages installed that are affected by multiple vulnerabilities as referenced in the ELSA-2017-2489 advisory.

    [2.6.2-8]
    - Fix CVE-2017-1000115 and CVE-2017-1000116

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

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

An update for mercurial is now available for Red Hat Enterprise Linux 7.

Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.

Mercurial is a fast, lightweight source control management system designed for efficient handling of very large distributed projects.

Security Fix(es) :

* A vulnerability was found in the way Mercurial handles path auditing and caches the results. An attacker could abuse a repository with a series of commits mixing symlinks and regular files/directories to trick Mercurial into writing outside of a given repository.
(CVE-2017-1000115)

* A shell command injection flaw related to the handling of 'ssh' URLs has been discovered in Mercurial. This can be exploited to execute shell commands with the privileges of the user running the Mercurial client, for example, when performing a 'checkout' or 'update' action on a sub-repository within a malicious repository or a legitimate repository containing a malicious commit. (CVE-2017-1000116)

Red Hat would like to thank the Mercurial Security Team for reporting CVE-2017-1000115 and the Subversion Team for reporting CVE-2017-1000116.

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

  - A vulnerability was found in the way Mercurial handles     path auditing and caches the results. An attacker could     abuse a repository with a series of commits mixing     symlinks and regular files/directories to trick     Mercurial into writing outside of a given repository.
    (CVE-2017-1000115)

  - A shell command injection flaw related to the handling     of 'ssh' URLs has been discovered in Mercurial. This     can be exploited to execute shell commands with the     privileges of the user running the Mercurial client,     for example, when performing a 'checkout' or 'update'     action on a sub-repository within a malicious     repository or a legitimate repository containing a     malicious commit. (CVE-2017-1000116)

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.

mercurial developers reports :

Mercurial prior to version 4.3 is vulnerable to a missing symlink check that can malicious repositories to modify files outside the repository

Mercurial prior to 4.3 did not adequately sanitize hostnames passed to ssh, leading to possible shell-injection attacks.

This update for mercurial fixes the following issues :

Mercurial was updated to 4.2.3, a security fix update for 

  - CVE-2017-1000115: Incomplete symlink auditing allowed     writing to files outside of the repository (boo#1053344)

  - CVE-2017-1000116: Client-side code execution via     argument injection in SSH URLs (boo#1052696)

The remote Redhat Enterprise Linux 7 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2017:2489 advisory.

    Mercurial is a fast, lightweight source control management system designed for efficient handling of very     large distributed projects.

    Security Fix(es):

    * A vulnerability was found in the way Mercurial handles path auditing and caches the results. An attacker     could abuse a repository with a series of commits mixing symlinks and regular files/directories to trick     Mercurial into writing outside of a given repository. (CVE-2017-1000115)

    * A shell command injection flaw related to the handling of ssh URLs has been discovered in Mercurial.
    This can be exploited to execute shell commands with the privileges of the user running the Mercurial     client, for example, when performing a checkout or update action on a sub-repository within a     malicious repository or a legitimate repository containing a malicious commit. (CVE-2017-1000116)

    Red Hat would like to thank the Mercurial Security Team for reporting CVE-2017-1000115 and the Subversion     Team for reporting CVE-2017-1000116.

Tenable has extracted the preceding description block directly from the Red Hat Enterprise Linux security advisory.

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

Security Fix(es) :

  - A vulnerability was found in the way Mercurial handles     path auditing and caches the results. An attacker could     abuse a repository with a series of commits mixing     symlinks and regular files/directories to trick     Mercurial into writing outside of a given repository.
    (CVE-2017-1000115)

  - A shell command injection flaw related to the handling     of 'ssh' URLs has been discovered in Mercurial. This can     be exploited to execute shell commands with the     privileges of the user running the Mercurial client, for     example, when performing a 'checkout' or 'update' action     on a sub- repository within a malicious repository or a     legitimate repository containing a malicious commit.
    (CVE-2017-1000116)

Security fix for CVE-2017-1000115, CVE-2017-1000116

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

Several issues were discovered in Mercurial, a distributed revision control system.

  - CVE-2017-9462 (fixed in stretch only)     Jonathan Claudius of Mozilla discovered that     repositories served over stdio could be tricked into     granting authorized users access to the Python debugger.

  - CVE-2017-1000115     Mercurial's symlink auditing was incomplete, and could     be abused to write files outside the repository.

  - CVE-2017-1000116     Joern Schneeweisz discovered that Mercurial did not     correctly handle maliciously constructed ssh:// URLs.
    This allowed an attacker to run an arbitrary shell     command.

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - Mercurial prior to 4.3 did not adequately sanitize hostnames passed to ssh, leading to possible shell-     injection attacks. (CVE-2017-1000116)

Note that Nessus relies on the presence of the package as reported by the vendor.

ID	Name	Product	Family	Published	Updated	Severity
102571	Oracle Linux 7 : mercurial (ELSA-2017-2489)	Nessus	Oracle Linux Local Security Checks	8/18/2017	10/23/2024	critical
102880	CentOS 7 : mercurial (CESA-2017:2489)	Nessus	CentOS Local Security Checks	9/1/2017	1/4/2021	critical
103076	EulerOS 2.0 SP2 : mercurial (EulerOS-SA-2017-1218)	Nessus	Huawei Local Security Checks	9/11/2017	11/24/2025	critical
103861	FreeBSD : mercurial -- multiple issues (b0628e53-092a-4037-938b-29805a7cd31b)	Nessus	FreeBSD Local Security Checks	10/17/2017	11/18/2025	critical
102560	openSUSE Security Update : mercurial (openSUSE-2017-941)	Nessus	SuSE Local Security Checks	8/18/2017	11/26/2025	critical
102575	RHEL 7 : mercurial (RHSA-2017:2489)	Nessus	Red Hat Local Security Checks	8/18/2017	11/5/2024	critical
102676	Scientific Linux Security Update : mercurial on SL7.x x86_64 (20170817)	Nessus	Scientific Linux Local Security Checks	8/22/2017	11/26/2025	critical
103075	EulerOS 2.0 SP1 : mercurial (EulerOS-SA-2017-1217)	Nessus	Huawei Local Security Checks	9/11/2017	11/24/2025	critical
103554	Fedora 25 : mercurial (2017-fa1d8ad61a)	Nessus	Fedora Local Security Checks	9/29/2017	11/19/2025	critical
102930	Debian DSA-3963-1 : mercurial - security update	Nessus	Debian Local Security Checks	9/5/2017	11/24/2025	critical
220074	Linux Distros Unpatched Vulnerability : CVE-2017-1000116	Nessus	Misc.	3/4/2025	7/19/2026	critical

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