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.
#%NASL_MIN_LEVEL 70300
#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Debian Security Advisory DSA-3963. The text
# itself is copyright (C) Software in the Public Interest, Inc.
#
include('deprecated_nasl_level.inc');
include('compat.inc');
if (description)
{
script_id(102930);
script_version("3.7");
script_set_attribute(attribute:"plugin_modification_date", value:"2021/01/04");
script_cve_id("CVE-2017-1000115", "CVE-2017-1000116", "CVE-2017-9462");
script_xref(name:"DSA", value:"3963");
script_name(english:"Debian DSA-3963-1 : mercurial - security update");
script_summary(english:"Checks dpkg output for the updated package");
script_set_attribute(
attribute:"synopsis",
value:"The remote Debian host is missing a security-related update."
);
script_set_attribute(
attribute:"description",
value:
"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."
);
script_set_attribute(
attribute:"see_also",
value:"https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=861243"
);
script_set_attribute(
attribute:"see_also",
value:"https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=871709"
);
script_set_attribute(
attribute:"see_also",
value:"https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=871710"
);
script_set_attribute(
attribute:"see_also",
value:"https://security-tracker.debian.org/tracker/CVE-2017-9462"
);
script_set_attribute(
attribute:"see_also",
value:"https://security-tracker.debian.org/tracker/CVE-2017-1000115"
);
script_set_attribute(
attribute:"see_also",
value:"https://security-tracker.debian.org/tracker/CVE-2017-1000116"
);
script_set_attribute(
attribute:"see_also",
value:"https://packages.debian.org/source/jessie/mercurial"
);
script_set_attribute(
attribute:"see_also",
value:"https://packages.debian.org/source/stretch/mercurial"
);
script_set_attribute(
attribute:"see_also",
value:"https://www.debian.org/security/2017/dsa-3963"
);
script_set_attribute(
attribute:"solution",
value:
"Upgrade the mercurial packages.
For the oldstable distribution (jessie), these problems have been
fixed in version 3.1.2-2+deb8u4.
For the stable distribution (stretch), these problems have been fixed
in version 4.0-1+deb9u1."
);
script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:C/I:C/A:C");
script_set_cvss_temporal_vector("CVSS2#E:F/RL:OF/RC:C");
script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H");
script_set_cvss3_temporal_vector("CVSS:3.0/E:F/RL:O/RC:C");
script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
script_set_attribute(attribute:"exploit_available", value:"true");
script_set_attribute(attribute:"metasploit_name", value:'Mercurial Custom hg-ssh Wrapper Remote Code Exec');
script_set_attribute(attribute:"exploit_framework_metasploit", value:"true");
script_set_attribute(attribute:"plugin_type", value:"local");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:mercurial");
script_set_attribute(attribute:"cpe", value:"cpe:/o:debian:debian_linux:8.0");
script_set_attribute(attribute:"cpe", value:"cpe:/o:debian:debian_linux:9.0");
script_set_attribute(attribute:"vuln_publication_date", value:"2017/06/06");
script_set_attribute(attribute:"patch_publication_date", value:"2017/09/04");
script_set_attribute(attribute:"plugin_publication_date", value:"2017/09/05");
script_set_attribute(attribute:"generated_plugin", value:"current");
script_end_attributes();
script_category(ACT_GATHER_INFO);
script_copyright(english:"This script is Copyright (C) 2017-2021 and is owned by Tenable, Inc. or an Affiliate thereof.");
script_family(english:"Debian Local Security Checks");
script_dependencies("ssh_get_info.nasl");
script_require_keys("Host/local_checks_enabled", "Host/Debian/release", "Host/Debian/dpkg-l");
exit(0);
}
include("audit.inc");
include("debian_package.inc");
if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
if (!get_kb_item("Host/Debian/release")) audit(AUDIT_OS_NOT, "Debian");
if (!get_kb_item("Host/Debian/dpkg-l")) audit(AUDIT_PACKAGE_LIST_MISSING);
flag = 0;
if (deb_check(release:"8.0", prefix:"mercurial", reference:"3.1.2-2+deb8u4")) flag++;
if (deb_check(release:"8.0", prefix:"mercurial-common", reference:"3.1.2-2+deb8u4")) flag++;
if (deb_check(release:"9.0", prefix:"mercurial", reference:"4.0-1+deb9u1")) flag++;
if (deb_check(release:"9.0", prefix:"mercurial-common", reference:"4.0-1+deb9u1")) flag++;
if (flag)
{
if (report_verbosity > 0) security_hole(port:0, extra:deb_report_get());
else security_hole(0);
exit(0);
}
else audit(AUDIT_HOST_NOT, "affected");
Vendor | Product | Version | CPE |
---|---|---|---|
debian | debian_linux | mercurial | p-cpe:/a:debian:debian_linux:mercurial |
debian | debian_linux | 8.0 | cpe:/o:debian:debian_linux:8.0 |
debian | debian_linux | 9.0 | cpe:/o:debian:debian_linux:9.0 |
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-1000115
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-1000116
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-9462
bugs.debian.org/cgi-bin/bugreport.cgi?bug=861243
bugs.debian.org/cgi-bin/bugreport.cgi?bug=871709
bugs.debian.org/cgi-bin/bugreport.cgi?bug=871710
packages.debian.org/source/jessie/mercurial
packages.debian.org/source/stretch/mercurial
security-tracker.debian.org/tracker/CVE-2017-1000115
security-tracker.debian.org/tracker/CVE-2017-1000116
security-tracker.debian.org/tracker/CVE-2017-9462
www.debian.org/security/2017/dsa-3963