CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
PARTIAL
AV:N/AC:L/Au:N/C:N/I:N/A:P
EPSS
Percentile
94.2%
It was discovered that git-daemon which is part of git-core, a popular distributed revision control system, is vulnerable to denial of service attacks caused by a programming mistake in handling requests containing extra unrecognized arguments which results in an infinite loop. While this is no problem for the daemon itself as every request will spawn a new git-daemon instance, this still results in a very high CPU consumption and might lead to denial of service conditions.
#%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-1841. The text
# itself is copyright (C) Software in the Public Interest, Inc.
#
include('deprecated_nasl_level.inc');
include('compat.inc');
if (description)
{
script_id(44706);
script_version("1.10");
script_set_attribute(attribute:"plugin_modification_date", value:"2021/01/04");
script_cve_id("CVE-2009-2108");
script_bugtraq_id(35338);
script_xref(name:"DSA", value:"1841");
script_name(english:"Debian DSA-1841-1 : git-core - denial of service");
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:
"It was discovered that git-daemon which is part of git-core, a popular
distributed revision control system, is vulnerable to denial of
service attacks caused by a programming mistake in handling requests
containing extra unrecognized arguments which results in an infinite
loop. While this is no problem for the daemon itself as every request
will spawn a new git-daemon instance, this still results in a very
high CPU consumption and might lead to denial of service conditions."
);
script_set_attribute(
attribute:"see_also",
value:"https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=532935"
);
script_set_attribute(
attribute:"see_also",
value:"https://www.debian.org/security/2009/dsa-1841"
);
script_set_attribute(
attribute:"solution",
value:
"Upgrade the git-core packages.
For the oldstable distribution (etch), this problem has been fixed in
version 1.4.4.4-4+etch3.
For the stable distribution (lenny), this problem has been fixed in
version 1.5.6.5-3+lenny2."
);
script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:P");
script_set_cvss_temporal_vector("CVSS2#E:POC/RL:OF/RC:C");
script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
script_set_attribute(attribute:"exploit_available", value:"true");
script_cwe_id(399);
script_set_attribute(attribute:"plugin_type", value:"local");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:git-core");
script_set_attribute(attribute:"cpe", value:"cpe:/o:debian:debian_linux:4.0");
script_set_attribute(attribute:"cpe", value:"cpe:/o:debian:debian_linux:5.0");
script_set_attribute(attribute:"patch_publication_date", value:"2009/07/25");
script_set_attribute(attribute:"plugin_publication_date", value:"2010/02/24");
script_end_attributes();
script_category(ACT_GATHER_INFO);
script_copyright(english:"This script is Copyright (C) 2010-2021 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:"4.0", prefix:"git-arch", reference:"1.4.4.4-4+etch3")) flag++;
if (deb_check(release:"4.0", prefix:"git-core", reference:"1.4.4.4-4+etch3")) flag++;
if (deb_check(release:"4.0", prefix:"git-cvs", reference:"1.4.4.4-4+etch3")) flag++;
if (deb_check(release:"4.0", prefix:"git-daemon-run", reference:"1.4.4.4-4+etch3")) flag++;
if (deb_check(release:"4.0", prefix:"git-doc", reference:"1.4.4.4-4+etch3")) flag++;
if (deb_check(release:"4.0", prefix:"git-email", reference:"1.4.4.4-4+etch3")) flag++;
if (deb_check(release:"4.0", prefix:"git-svn", reference:"1.4.4.4-4+etch3")) flag++;
if (deb_check(release:"4.0", prefix:"gitk", reference:"1.4.4.4-4+etch3")) flag++;
if (deb_check(release:"4.0", prefix:"gitweb", reference:"1.4.4.4-4+etch3")) flag++;
if (deb_check(release:"5.0", prefix:"git-arch", reference:"1.5.6.5-3+lenny2")) flag++;
if (deb_check(release:"5.0", prefix:"git-core", reference:"1.5.6.5-3+lenny2")) flag++;
if (deb_check(release:"5.0", prefix:"git-cvs", reference:"1.5.6.5-3+lenny2")) flag++;
if (deb_check(release:"5.0", prefix:"git-daemon-run", reference:"1.5.6.5-3+lenny2")) flag++;
if (deb_check(release:"5.0", prefix:"git-doc", reference:"1.5.6.5-3+lenny2")) flag++;
if (deb_check(release:"5.0", prefix:"git-email", reference:"1.5.6.5-3+lenny2")) flag++;
if (deb_check(release:"5.0", prefix:"git-gui", reference:"1.5.6.5-3+lenny2")) flag++;
if (deb_check(release:"5.0", prefix:"git-svn", reference:"1.5.6.5-3+lenny2")) flag++;
if (deb_check(release:"5.0", prefix:"gitk", reference:"1.5.6.5-3+lenny2")) flag++;
if (deb_check(release:"5.0", prefix:"gitweb", reference:"1.5.6.5-3+lenny2")) flag++;
if (flag)
{
if (report_verbosity > 0) security_warning(port:0, extra:deb_report_get());
else security_warning(0);
exit(0);
}
else audit(AUDIT_HOST_NOT, "affected");
Vendor | Product | Version | CPE |
---|---|---|---|
debian | debian_linux | git-core | p-cpe:/a:debian:debian_linux:git-core |
debian | debian_linux | 4.0 | cpe:/o:debian:debian_linux:4.0 |
debian | debian_linux | 5.0 | cpe:/o:debian:debian_linux:5.0 |