The stringprep_utf8_nfkc_normalize function in lib/nfkc.c in libidn before 1.33 allows context-dependent attackers to cause a denial of service (out-of-bounds read and crash) via crafted UTF-8 data.

The remote NewStart CGSL host, running version MAIN 6.02, has glibc packages installed that are affected by multiple vulnerabilities:

  - The idna_to_ascii_4i function in lib/idna.c in libidn before 1.33 allows context-dependent attackers to     cause a denial of service (out-of-bounds read and crash) via 64 bytes of input. (CVE-2016-6261)

  - The stringprep_utf8_nfkc_normalize function in lib/nfkc.c in libidn before 1.33 allows context-dependent     attackers to cause a denial of service (out-of-bounds read and crash) via crafted UTF-8 data.
    (CVE-2016-6263)

  - A memory leak in glibc 2.1.1 (released on May 24, 1999) can be reached and amplified through the     LD_HWCAP_MASK environment variable. Please note that many versions of glibc are not vulnerable to this     issue if patched for CVE-2017-1000366. (CVE-2017-1000408)

  - A buffer overflow in glibc 2.5 (released on September 29, 2006) and can be triggered through the     LD_LIBRARY_PATH environment variable. Please note that many versions of glibc are not vulnerable to this     issue if patched for CVE-2017-1000366. (CVE-2017-1000409)

  - Integer overflow in the decode_digit function in puny_decode.c in Libidn2 before 2.0.4 allows remote     attackers to cause a denial of service or possibly have unspecified other impact. (CVE-2017-14062)

  - The GNU C Library (aka glibc or libc6) before 2.27 contains an off-by-one error leading to a heap-based     buffer overflow in the glob function in glob.c, related to the processing of home directories using the ~     operator followed by a long string. (CVE-2017-15670)

  - The glob function in glob.c in the GNU C Library (aka glibc or libc6) before 2.27 contains a buffer     overflow during unescaping of user names with the ~ operator. (CVE-2017-15804)

  - elf/dl-load.c in the GNU C Library (aka glibc or libc6) 2.19 through 2.26 mishandles RPATH and RUNPATH     containing $ORIGIN for a privileged (setuid or AT_SECURE) program, which allows local users to gain     privileges via a Trojan horse library in the current working directory, related to the fillin_rpath and     decompose_rpath functions. This is associated with misinterpretion of an empty RPATH/RUNPATH token as the     ./ directory. NOTE: this configuration of RPATH/RUNPATH for a privileged program is apparently very     uncommon; most likely, no such program is shipped with any common Linux distribution. (CVE-2017-16997)

  - The malloc function in the GNU C Library (aka glibc or libc6) 2.26 could return a memory block that is too     small if an attempt is made to allocate an object whose size is close to SIZE_MAX, potentially leading to     a subsequent heap overflow. This occurs because the per-thread cache (aka tcache) feature enables a code     path that lacks an integer overflow check. (CVE-2017-17426)

  - An SSE2-optimized memmove implementation for i386 in sysdeps/i386/i686/multiarch/memcpy-sse2-unaligned.S     in the GNU C Library (aka glibc or libc6) 2.21 through 2.27 does not correctly perform the overlapping     memory check if the source memory range spans the middle of the address space, resulting in corrupt data     being produced by the copy operation. This may disclose information to context-dependent attackers, or     result in a denial of service, or, possibly, code execution. (CVE-2017-18269)

  - In glibc 2.26 and earlier there is confusion in the usage of getcwd() by realpath() which can be used to     write before the destination buffer leading to a buffer underflow and potential code execution.
    (CVE-2018-1000001)

  - stdlib/canonicalize.c in the GNU C Library (aka glibc or libc6) 2.27 and earlier, when processing very     long pathname arguments to the realpath function, could encounter an integer overflow on 32-bit     architectures, leading to a stack-based buffer overflow and, potentially, arbitrary code execution.
    (CVE-2018-11236)

  - An AVX-512-optimized implementation of the mempcpy function in the GNU C Library (aka glibc or libc6) 2.27     and earlier may write data beyond the target buffer, leading to a buffer overflow in
    __mempcpy_avx512_no_vzeroupper. (CVE-2018-11237)

  - In the GNU C Library (aka glibc or libc6) through 2.28, attempting to resolve a crafted hostname via     getaddrinfo() leads to the allocation of a socket descriptor that is not closed. This is related to the     if_nametoindex() function. (CVE-2018-19591)

  - In the GNU C Library (aka glibc or libc6) through 2.29, proceed_next_node in posix/regexec.c has a heap-     based buffer over-read via an attempted case-insensitive regular-expression match. (CVE-2019-9169)

  - The GNU C Library (aka glibc or libc6) before 2.32 could overflow an on-stack buffer during range     reduction if an input to an 80-bit long double function contains a non-canonical bit pattern, a seen when     passing a 0x5d414141414141410000 value to sinl on x86 targets. This is related to     sysdeps/ieee754/ldbl-96/e_rem_pio2l.c. (CVE-2020-10029)

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 libidn package installed, the EulerOS Virtualization for ARM 64 installation on the remote host is affected by the following vulnerabilities :

  - idn in GNU libidn before 1.33 might allow remote     attackers to obtain sensitive memory information by     reading a zero byte as input, which triggers an     out-of-bounds read.(CVE-2015-8948)

  - The idna_to_ascii_4i function in lib/idna.c in libidn     before 1.33 allows context-dependent attackers to cause     a denial of service (out-of-bounds read and crash) via     64 bytes of input.(CVE-2016-6261)

  - idn in libidn before 1.33 might allow remote attackers     to obtain sensitive memory information by reading a     zero byte as input, which triggers an out-of-bounds     read, a different vulnerability than     CVE-2015-8948.(CVE-2016-6262)

  - The stringprep_utf8_nfkc_normalize function in     lib/nfkc.c in libidn before 1.33 allows     context-dependent attackers to cause a denial of     service (out-of-bounds read and crash) via crafted     UTF-8 data.(CVE-2016-6263)

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.

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

  - idn in libidn before 1.33 might allow remote attackers     to obtain sensitive memory information by reading a     zero byte as input, which triggers an out-of-bounds     read, a different vulnerability than     CVE-2015-8948.(CVE-2016-6262)

  - idn in GNU libidn before 1.33 might allow remote     attackers to obtain sensitive memory information by     reading a zero byte as input, which triggers an     out-of-bounds read.(CVE-2015-8948)

  - The stringprep_utf8_nfkc_normalize function in     lib/nfkc.c in libidn before 1.33 allows     context-dependent attackers to cause a denial of     service (out-of-bounds read and crash) via crafted     UTF-8 data.(CVE-2016-6263)

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.

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

  - The stringprep_utf8_nfkc_normalize function in     lib/nfkc.c in libidn before 1.33 allows     context-dependent attackers to cause a denial of     service (out-of-bounds read and crash) via crafted     UTF-8 data.(CVE-2016-6263)

  - idn in libidn before 1.33 might allow remote attackers     to obtain sensitive memory information by reading a     zero byte as input, which triggers an out-of-bounds     read, a different vulnerability than     CVE-2015-8948.(CVE-2016-6262)

  - The idna_to_ascii_4i function in lib/idna.c in libidn     before 1.33 allows context-dependent attackers to cause     a denial of service (out-of-bounds read and crash) via     64 bytes of input.(CVE-2016-6261)

  - idn in GNU libidn before 1.33 might allow remote     attackers to obtain sensitive memory information by     reading a zero byte as input, which triggers an     out-of-bounds read.(CVE-2015-8948)

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.

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

  - The idna_to_ascii_4i function in lib/idna.c in libidn     before 1.33 allows context-dependent attackers to cause     a denial of service (out-of-bounds read and crash) via     64 bytes of input.(CVE-2016-6261)

  - The stringprep_utf8_nfkc_normalize function in     lib/nfkc.c in libidn before 1.33 allows     context-dependent attackers to cause a denial of     service (out-of-bounds read and crash) via crafted     UTF-8 data.(CVE-2016-6263)

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.

The remote host is affected by the vulnerability described in GLSA-201908-06 (glibc: Multiple vulnerabilities)

    Multiple vulnerabilities have been discovered in glibc. Please review       the CVE identifiers referenced below for details.
  Impact :

    Please review the referenced CVE identifiers for details.
  Workaround :

    There is no known workaround at this time.

According to the version of the libidn package installed, the EulerOS Virtualization installation on the remote host is affected by the following vulnerability :

  - The stringprep_utf8_nfkc_normalize function in     lib/nfkc.c in libidn before 1.33 allows     context-dependent attackers to cause a denial of     service (out-of-bounds read and crash) via crafted     UTF-8 data.i1/4^CVE-2016-6263i1/4%0

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.

Update to 1.33 (#1374902,#1359147,#1359148)

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.

This update for libidn fixes the following issues :

  - CVE-2016-6262 and CVE-2015-8948: Out-of-bounds-read when     reading one zero byte as input (bsc#990189)

  - CVE-2016-6261: Out-of-bounds stack read in     idna_to_ascii_4i (bsc#990190)

  - CVE-2016-6263: stringprep_utf8_nfkc_normalize reject     invalid UTF-8 (bsc#990191)

  - CVE-2015-2059: out-of-bounds read with stringprep on     invalid UTF-8 (bsc#923241)

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.

Hanno Boeck discovered multiple vulnerabilities in libidn, the GNU library for Internationalized Domain Names (IDNs), allowing a remote attacker to cause a denial of service against an application using the libidn library (application crash).

Thijs Alkemade, Gustavo Grieco, Daniel Stenberg, and Nikos Mavrogiannopoulos discovered that Libidn incorrectly handled invalid UTF-8 characters. A remote attacker could use this issue to cause Libidn to crash, resulting in a denial of service, or possibly disclose sensitive memory. This issue only applied to Ubuntu 12.04 LTS and Ubuntu 14.04 LTS. (CVE-2015-2059)

Hanno Bock discovered that Libidn incorrectly handled certain input.
A remote attacker could possibly use this issue to cause Libidn to crash, resulting in a denial of service. (CVE-2015-8948, CVE-2016-6262, CVE-2016-6261, CVE-2016-6263).

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.

This update for libidn fixes the following issues :

  - CVE-2016-6262 and CVE-2015-8948: Out-of-bounds-read when     reading one zero byte as input (bsc#990189)

  - CVE-2016-6261: Out-of-bounds stack read in     idna_to_ascii_4i (bsc#990190) 

  - CVE-2016-6263: stringprep_utf8_nfkc_normalize reject     invalid UTF-8 (bsc#990191)

  - CVE-2015-2059: out-of-bounds read with stringprep on     invalid UTF-8 (bsc#923241) 

This update was imported from the SUSE:SLE-12:Update update project.

Security fix for CVE-2016-6263, CVE-2015-8948, CVE-2016-6262, CVE-2016-6261

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.

This libidn update to version 1.33 fixes the following issues :

Security issues fixed :

  - CVE-2015-8948, CVE-2016-6262: Fixed an     out-of-bounds-read when reading one zero byte as input     (bsc#990189).

  - CVE-2016-6263: Fixed stringprep_utf8_nfkc_normalize to     reject invalid UTF-8 (bsc#boo#990191).

Included bugfixes :

  - Fixed crash in idna_to_unicode_8z8z and     idna_to_unicode_8zlz (introduced in 1.31).

  - API and ABI is backwards compatible with the previous     version.

  - Update gpg keyring

Multiple vulnerabilities have been discovered in libidn. The Common Vulnerabilities and Exposures project identifies the following problems :

CVE-2015-8948

When idn is reading one zero byte as input an out-of-bounds-read occurred.

CVE-2016-6261

An out-of-bounds stack read is exploitable in idna_to_ascii_4i.

CVE-2016-6263

stringprep_utf8_nfkc_normalize reject invalid UTF-8, causes a crash.

For Debian 7 'Wheezy', these problems have been fixed in version 1.25-2+deb7u2.

We recommend that you upgrade your libidn packages.

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

Simon Josefsson reports :

libidn: Fix out-of-bounds stack read in idna_to_ascii_4i.

idn: Solve out-of-bounds-read when reading one zero byte as input.
Also replaced fgets with getline.

libidn: stringprep_utf8_nfkc_normalize reject invalid UTF-8. It was always documented to only accept UTF-8 data, but now it doesn't crash when presented with such data.

New libidn packages are available for Slackware 13.0, 13.1, 13.37, 14.0, 14.1, 14.2, and -current to fix security issues.

ID	Name	Product	Family	Severity
147282	NewStart CGSL MAIN 6.02 : glibc Multiple Vulnerabilities (NS-SA-2021-0053)	Nessus	NewStart CGSL Local Security Checks	critical
134554	EulerOS Virtualization for ARM 64 3.0.2.0 : libidn (EulerOS-SA-2020-1265)	Nessus	Huawei Local Security Checks	high
131884	EulerOS 2.0 SP2 : libidn (EulerOS-SA-2019-2392)	Nessus	Huawei Local Security Checks	high
130668	EulerOS 2.0 SP5 : libidn (EulerOS-SA-2019-2206)	Nessus	Huawei Local Security Checks	high
129242	EulerOS 2.0 SP3 : libidn (EulerOS-SA-2019-2049)	Nessus	Huawei Local Security Checks	high
127955	GLSA-201908-06 : glibc: Multiple vulnerabilities	Nessus	Gentoo Local Security Checks	high
123736	EulerOS Virtualization 2.5.3 : libidn (EulerOS-SA-2019-1268)	Nessus	Huawei Local Security Checks	high
94888	Fedora 25 : mingw-libidn (2016-f99c0a8b69)	Nessus	Fedora Local Security Checks	high
93459	SUSE SLES11 Security Update : libidn (SUSE-SU-2016:2291-1)	Nessus	SuSE Local Security Checks	high
93292	SUSE SLED12 / SLES12 Security Update : libidn (SUSE-SU-2016:2079-1)	Nessus	SuSE Local Security Checks	high
93254	Debian DSA-3658-1 : libidn - security update	Nessus	Debian Local Security Checks	high
93107	Ubuntu 14.04 LTS / 16.04 LTS : Libidn vulnerabilities (USN-3068-1)	Nessus	Ubuntu Local Security Checks	high
93092	openSUSE Security Update : libidn (openSUSE-2016-1014)	Nessus	SuSE Local Security Checks	high
92800	Fedora 23 : libidn (2016-610fe5f5f8)	Nessus	Fedora Local Security Checks	high
92743	openSUSE Security Update : libidn (openSUSE-2016-925)	Nessus	SuSE Local Security Checks	high
92683	Debian DLA-582-1 : libidn security update	Nessus	Debian Local Security Checks	high
92652	FreeBSD : libidn -- multiple vulnerabilities (cb5189eb-572f-11e6-b334-002590263bf5)	Nessus	FreeBSD Local Security Checks	high
92607	Slackware 13.0 / 13.1 / 13.37 / 14.0 / 14.1 / 14.2 / current : libidn (SSA:2016-210-01)	Nessus	Slackware Local Security Checks	high
92529	Fedora 24 : libidn (2016-42514bee97)	Nessus	Fedora Local Security Checks	high

Detections

Analytics

CVE-2016-6263

high

Tenable Plugins

critical

high

high

high

high

high

high

high

high

high

high

high

high

high

high

high

high

high

high