Vulnerabilities > CVE-2018-20546 - Integer Overflow or Wraparound vulnerability in multiple products
Attack vector
NETWORK Attack complexity
LOW Privileges required
NONE Confidentiality impact
HIGH Integrity impact
NONE Availability impact
HIGH Summary
There is an illegal READ memory access at caca/dither.c (function get_rgba_default) in libcaca 0.99.beta19 for the default bpp case.
Vulnerable Configurations
Part | Description | Count |
---|---|---|
Application | 1 | |
OS | 5 | |
OS | 3 | |
OS | 1 | |
OS | 1 |
Common Weakness Enumeration (CWE)
Common Attack Pattern Enumeration and Classification (CAPEC)
- Forced Integer Overflow This attack forces an integer variable to go out of range. The integer variable is often used as an offset such as size of memory allocation or similarly. The attacker would typically control the value of such variable and try to get it out of range. For instance the integer in question is incremented past the maximum possible value, it may wrap to become a very small, or negative number, therefore providing a very incorrect value which can lead to unexpected behavior. At worst the attacker can execute arbitrary code.
Nessus
NASL family SuSE Local Security Checks NASL id SUSE_SU-2019-2745-1.NASL description This update for libcaca fixes the following issues : Security issues fixed : CVE-2018-20544: Fixed a floating point exception at caca/dither.c (bsc#1120502) CVE-2018-20545: Fixed a WRITE memory access in the load_image function at common-image.c for 4bpp (bsc#1120584) CVE-2018-20546: Fixed a READ memory access in the get_rgba_default function at caca/dither.c for bpp (bsc#1120503) CVE-2018-20547: Fixed a READ memory access in the get_rgba_default function at caca/dither.c for 24bpp (bsc#1120504) CVE-2018-20548: Fixed a WRITE memory access in the load_image function at common-image.c for 1bpp (bsc#1120589) CVE-2018-20549: Fixed a WRITE memory access in the caca_file_read function at caca/file.c (bsc#1120470) Note that Tenable Network Security has extracted the preceding description block directly from the SUSE security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues. last seen 2020-06-01 modified 2020-06-02 plugin id 130166 published 2019-10-23 reporter This script is Copyright (C) 2019 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/130166 title SUSE SLED12 / SLES12 Security Update : libcaca (SUSE-SU-2019:2745-1) code # # (C) Tenable Network Security, Inc. # # The descriptive text and package checks in this plugin were # extracted from SUSE update advisory SUSE-SU-2019:2745-1. # The text itself is copyright (C) SUSE. # include("compat.inc"); if (description) { script_id(130166); script_version("1.2"); script_cvs_date("Date: 2019/12/18"); script_cve_id("CVE-2018-20544", "CVE-2018-20545", "CVE-2018-20546", "CVE-2018-20547", "CVE-2018-20548", "CVE-2018-20549"); script_name(english:"SUSE SLED12 / SLES12 Security Update : libcaca (SUSE-SU-2019:2745-1)"); script_summary(english:"Checks rpm output for the updated packages."); script_set_attribute( attribute:"synopsis", value:"The remote SUSE host is missing one or more security updates." ); script_set_attribute( attribute:"description", value: "This update for libcaca fixes the following issues : Security issues fixed : CVE-2018-20544: Fixed a floating point exception at caca/dither.c (bsc#1120502) CVE-2018-20545: Fixed a WRITE memory access in the load_image function at common-image.c for 4bpp (bsc#1120584) CVE-2018-20546: Fixed a READ memory access in the get_rgba_default function at caca/dither.c for bpp (bsc#1120503) CVE-2018-20547: Fixed a READ memory access in the get_rgba_default function at caca/dither.c for 24bpp (bsc#1120504) CVE-2018-20548: Fixed a WRITE memory access in the load_image function at common-image.c for 1bpp (bsc#1120589) CVE-2018-20549: Fixed a WRITE memory access in the caca_file_read function at caca/file.c (bsc#1120470) Note that Tenable Network Security has extracted the preceding description block directly from the SUSE security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues." ); script_set_attribute( attribute:"see_also", value:"https://bugzilla.suse.com/show_bug.cgi?id=1120470" ); script_set_attribute( attribute:"see_also", value:"https://bugzilla.suse.com/show_bug.cgi?id=1120502" ); script_set_attribute( attribute:"see_also", value:"https://bugzilla.suse.com/show_bug.cgi?id=1120503" ); script_set_attribute( attribute:"see_also", value:"https://bugzilla.suse.com/show_bug.cgi?id=1120504" ); script_set_attribute( attribute:"see_also", value:"https://bugzilla.suse.com/show_bug.cgi?id=1120584" ); script_set_attribute( attribute:"see_also", value:"https://bugzilla.suse.com/show_bug.cgi?id=1120589" ); script_set_attribute( attribute:"see_also", value:"https://www.suse.com/security/cve/CVE-2018-20544/" ); script_set_attribute( attribute:"see_also", value:"https://www.suse.com/security/cve/CVE-2018-20545/" ); script_set_attribute( attribute:"see_also", value:"https://www.suse.com/security/cve/CVE-2018-20546/" ); script_set_attribute( attribute:"see_also", value:"https://www.suse.com/security/cve/CVE-2018-20547/" ); script_set_attribute( attribute:"see_also", value:"https://www.suse.com/security/cve/CVE-2018-20548/" ); script_set_attribute( attribute:"see_also", value:"https://www.suse.com/security/cve/CVE-2018-20549/" ); # https://www.suse.com/support/update/announcement/2019/suse-su-20192745-1/ script_set_attribute( attribute:"see_also", value:"http://www.nessus.org/u?fc470fcb" ); script_set_attribute( attribute:"solution", value: "To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or 'zypper patch'. Alternatively you can run the command listed for your product : SUSE Linux Enterprise Software Development Kit 12-SP4:zypper in -t patch SUSE-SLE-SDK-12-SP4-2019-2745=1 SUSE Linux Enterprise Server 12-SP4:zypper in -t patch SUSE-SLE-SERVER-12-SP4-2019-2745=1 SUSE Linux Enterprise Desktop 12-SP4:zypper in -t patch SUSE-SLE-DESKTOP-12-SP4-2019-2745=1" ); script_set_cvss_base_vector("CVSS2#AV:N/AC:M/Au:N/C:P/I:P/A:P"); script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C"); script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H"); script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C"); script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available"); script_set_attribute(attribute:"plugin_type", value:"local"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:libcaca-debugsource"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:libcaca0"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:libcaca0-debuginfo"); script_set_attribute(attribute:"cpe", value:"cpe:/o:novell:suse_linux:12"); script_set_attribute(attribute:"vuln_publication_date", value:"2018/12/28"); script_set_attribute(attribute:"patch_publication_date", value:"2019/10/22"); script_set_attribute(attribute:"plugin_publication_date", value:"2019/10/23"); script_set_attribute(attribute:"generated_plugin", value:"current"); script_end_attributes(); script_category(ACT_GATHER_INFO); script_copyright(english:"This script is Copyright (C) 2019 and is owned by Tenable, Inc. or an Affiliate thereof."); script_family(english:"SuSE Local Security Checks"); script_dependencies("ssh_get_info.nasl"); script_require_keys("Host/local_checks_enabled", "Host/cpu", "Host/SuSE/release", "Host/SuSE/rpm-list"); exit(0); } include("audit.inc"); include("global_settings.inc"); include("rpm.inc"); if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED); release = get_kb_item("Host/SuSE/release"); if (isnull(release) || release !~ "^(SLED|SLES)") audit(AUDIT_OS_NOT, "SUSE"); os_ver = pregmatch(pattern: "^(SLE(S|D)\d+)", string:release); if (isnull(os_ver)) audit(AUDIT_UNKNOWN_APP_VER, "SUSE"); os_ver = os_ver[1]; if (! preg(pattern:"^(SLED12|SLES12)$", string:os_ver)) audit(AUDIT_OS_NOT, "SUSE SLED12 / SLES12", "SUSE " + os_ver); if (!get_kb_item("Host/SuSE/rpm-list")) audit(AUDIT_PACKAGE_LIST_MISSING); cpu = get_kb_item("Host/cpu"); if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH); if (cpu !~ "^i[3-6]86$" && "x86_64" >!< cpu && "s390x" >!< cpu) audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, "SUSE " + os_ver, cpu); sp = get_kb_item("Host/SuSE/patchlevel"); if (isnull(sp)) sp = "0"; if (os_ver == "SLES12" && (! preg(pattern:"^(4)$", string:sp))) audit(AUDIT_OS_NOT, "SLES12 SP4", os_ver + " SP" + sp); if (os_ver == "SLED12" && (! preg(pattern:"^(4)$", string:sp))) audit(AUDIT_OS_NOT, "SLED12 SP4", os_ver + " SP" + sp); flag = 0; if (rpm_check(release:"SLES12", sp:"4", reference:"libcaca-debugsource-0.99.beta18-14.3.27")) flag++; if (rpm_check(release:"SLES12", sp:"4", reference:"libcaca0-0.99.beta18-14.3.27")) flag++; if (rpm_check(release:"SLES12", sp:"4", reference:"libcaca0-debuginfo-0.99.beta18-14.3.27")) flag++; if (rpm_check(release:"SLED12", sp:"4", cpu:"x86_64", reference:"libcaca-debugsource-0.99.beta18-14.3.27")) flag++; if (rpm_check(release:"SLED12", sp:"4", cpu:"x86_64", reference:"libcaca0-0.99.beta18-14.3.27")) flag++; if (rpm_check(release:"SLED12", sp:"4", cpu:"x86_64", reference:"libcaca0-debuginfo-0.99.beta18-14.3.27")) flag++; if (flag) { if (report_verbosity > 0) security_warning(port:0, extra:rpm_report_get()); else security_warning(0); exit(0); } else { tested = pkg_tests_get(); if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested); else audit(AUDIT_PACKAGE_NOT_INSTALLED, "libcaca"); }
NASL family SuSE Local Security Checks NASL id SUSE_SU-2019-2745-2.NASL description This update for libcaca fixes the following issues : Security issues fixed : CVE-2018-20544: Fixed a floating point exception at caca/dither.c (bsc#1120502) CVE-2018-20545: Fixed a WRITE memory access in the load_image function at common-image.c for 4bpp (bsc#1120584) CVE-2018-20546: Fixed a READ memory access in the get_rgba_default function at caca/dither.c for bpp (bsc#1120503) CVE-2018-20547: Fixed a READ memory access in the get_rgba_default function at caca/dither.c for 24bpp (bsc#1120504) CVE-2018-20548: Fixed a WRITE memory access in the load_image function at common-image.c for 1bpp (bsc#1120589) CVE-2018-20549: Fixed a WRITE memory access in the caca_file_read function at caca/file.c (bsc#1120470) Note that Tenable Network Security has extracted the preceding description block directly from the SUSE security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues. last seen 2020-06-01 modified 2020-06-02 plugin id 130942 published 2019-11-13 reporter This script is Copyright (C) 2019 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/130942 title SUSE SLES12 Security Update : libcaca (SUSE-SU-2019:2745-2) NASL family Debian Local Security Checks NASL id DEBIAN_DLA-1631.NASL description Several vulnerabilities were discovered in libcaca, a graphics library that outputs text: integer overflows, floating point exceptions or invalid memory reads may lead to a denial of service (application crash) if a malformed image file is processed. For Debian 8 last seen 2020-03-17 modified 2019-01-10 plugin id 121055 published 2019-01-10 reporter This script is Copyright (C) 2019-2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/121055 title Debian DLA-1631-1 : libcaca security update NASL family SuSE Local Security Checks NASL id SUSE_SU-2019-0770-1.NASL description This update for libcaca fixes the following issues : Security issues fixed : CVE-2018-20544: Fixed a floating point exception at caca/dither.c (bsc#1120502) CVE-2018-20545: Fixed a WRITE memory access in the load_image function at common-image.c for 4bpp (bsc#1120584) CVE-2018-20546: Fixed a READ memory access in the get_rgba_default function at caca/dither.c for bpp (bsc#1120503) CVE-2018-20547: Fixed a READ memory access in the get_rgba_default function at caca/dither.c for 24bpp (bsc#1120504) CVE-2018-20548: Fixed a WRITE memory access in the load_image function at common-image.c for 1bpp (bsc#1120589) CVE-2018-20549: Fixed a WRITE memory access in the caca_file_read function at caca/file.c (bsc#1120470) Note that Tenable Network Security has extracted the preceding description block directly from the SUSE security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues. last seen 2020-06-01 modified 2020-06-02 plugin id 123446 published 2019-03-28 reporter This script is Copyright (C) 2019-2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/123446 title SUSE SLED15 / SLES15 Security Update : libcaca (SUSE-SU-2019:0770-1) NASL family SuSE Local Security Checks NASL id OPENSUSE-2019-1144.NASL description This update for libcaca fixes the following issues : Security issues fixed : - CVE-2018-20544: Fixed a floating point exception at caca/dither.c (bsc#1120502) - CVE-2018-20545: Fixed a WRITE memory access in the load_image function at common-image.c for 4bpp (bsc#1120584) - CVE-2018-20546: Fixed a READ memory access in the get_rgba_default function at caca/dither.c for bpp (bsc#1120503) - CVE-2018-20547: Fixed a READ memory access in the get_rgba_default function at caca/dither.c for 24bpp (bsc#1120504) - CVE-2018-20548: Fixed a WRITE memory access in the load_image function at common-image.c for 1bpp (bsc#1120589) - CVE-2018-20549: Fixed a WRITE memory access in the caca_file_read function at caca/file.c (bsc#1120470) This update was imported from the SUSE:SLE-15:Update update project. last seen 2020-06-01 modified 2020-06-02 plugin id 123774 published 2019-04-05 reporter This script is Copyright (C) 2019-2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/123774 title openSUSE Security Update : libcaca (openSUSE-2019-1144) NASL family Ubuntu Local Security Checks NASL id UBUNTU_USN-3860-1.NASL description It was discovered that libcaca incorrectly handled certain images. An attacker could possibly use this issue to cause a denial of service. (CVE-2018-20544) It was discovered that libcaca incorrectly handled certain images. An attacker could possibly use this issue to execute arbitrary code. (CVE-2018-20545, CVE-2018-20548, CVE-2018-20459) It was discovered that libcaca incorrectly handled certain images. An attacker could possibly use this issue to access sensitive information. (CVE-2018-20546, CVE-2018-20547). Note that Tenable Network Security has extracted the preceding description block directly from the Ubuntu security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues. last seen 2020-03-18 modified 2019-01-16 plugin id 121212 published 2019-01-16 reporter Ubuntu Security Notice (C) 2019-2020 Canonical, Inc. / NASL script (C) 2019-2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/121212 title Ubuntu 14.04 LTS / 16.04 LTS / 18.04 LTS / 18.10 : libcaca vulnerabilities (USN-3860-1)
References
- http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00033.html
- http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00033.html
- https://bugzilla.redhat.com/show_bug.cgi?id=1652622
- https://bugzilla.redhat.com/show_bug.cgi?id=1652622
- https://github.com/cacalabs/libcaca/commit/1022d97496c7899e8641515af363381b31ae2f05
- https://github.com/cacalabs/libcaca/commit/1022d97496c7899e8641515af363381b31ae2f05
- https://github.com/cacalabs/libcaca/issues/38
- https://github.com/cacalabs/libcaca/issues/38
- https://lists.debian.org/debian-lts-announce/2019/01/msg00007.html
- https://lists.debian.org/debian-lts-announce/2019/01/msg00007.html
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/6WFGYICNTMNDNMDDUV4G2RYFB5HNJCOV/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/6WFGYICNTMNDNMDDUV4G2RYFB5HNJCOV/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PC7EGOEQ5C4OD66ZUJJIIYEXBTZOCMZX/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PC7EGOEQ5C4OD66ZUJJIIYEXBTZOCMZX/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZSBCRN6EGQJUVOSD4OEEQ6XORHEM2CUL/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZSBCRN6EGQJUVOSD4OEEQ6XORHEM2CUL/
- https://usn.ubuntu.com/3860-1/
- https://usn.ubuntu.com/3860-1/
- https://usn.ubuntu.com/3860-2/
- https://usn.ubuntu.com/3860-2/