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.

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.

The remote Ubuntu 16.04 LTS / 18.04 LTS host has packages installed that are affected by multiple vulnerabilities as referenced in the USN-4416-1 advisory.

    Florian Weimer discovered that the GNU C Library incorrectly handled certain memory operations. A remote     attacker could use this issue to cause the GNU C Library to crash, resulting in a denial of service, or     possibly execute arbitrary code. This issue only affected Ubuntu 16.04 LTS. (CVE-2017-12133)

    It was discovered that the GNU C Library incorrectly handled certain SSE2-optimized memmove operations. A     remote attacker could use this issue to cause the GNU C Library to crash, resulting in a denial of     service, or possibly execute arbitrary code. This issue only affected Ubuntu 16.04 LTS. (CVE-2017-18269)

    It was discovered that the GNU C Library incorrectly handled certain pathname operations. A remote     attacker could use this issue to cause the GNU C Library to crash, resulting in a denial of service, or     possibly execute arbitrary code. This issue only affected Ubuntu 18.04 LTS. (CVE-2018-11236)

    It was discovered that the GNU C Library incorrectly handled certain AVX-512-optimized mempcpy operations.
    A remote attacker could use this issue to cause the GNU C Library to crash, resulting in a denial of     service, or possibly execute arbitrary code. This issue only affected Ubuntu 18.04 LTS. (CVE-2018-11237)

    It was discovered that the GNU C Library incorrectly handled certain hostname loookups. A remote attacker     could use this issue to cause the GNU C Library to crash, resulting in a denial of service, or possibly     execute arbitrary code. This issue only affected Ubuntu 18.04 LTS. (CVE-2018-19591)

    Jakub Wilk discovered that the GNU C Library incorrectly handled certain memalign functions. A remote     attacker could use this issue to cause the GNU C Library to crash, resulting in a denial of service, or     possibly execute arbitrary code. This issue only affected Ubuntu 16.04 LTS. (CVE-2018-6485)

    It was discovered that the GNU C Library incorrectly ignored the LD_PREFER_MAP_32BIT_EXEC environment     variable after security transitions. A local attacker could use this issue to bypass ASLR restrictions.
    (CVE-2019-19126)

    It was discovered that the GNU C Library incorrectly handled certain regular expressions. A remote     attacker could possibly use this issue to cause the GNU C Library to crash, resulting in a denial of     service. This issue only affected Ubuntu 16.04 LTS and Ubuntu 18.04 LTS. (CVE-2019-9169)

    It was discovered that the GNU C Library incorrectly handled certain bit patterns. A remote attacker could     use this issue to cause the GNU C Library to crash, resulting in a denial of service, or possibly execute     arbitrary code. This issue only affected Ubuntu 16.04 LTS and Ubuntu 18.04 LTS. (CVE-2020-10029)

    It was discovered that the GNU C Library incorrectly handled certain signal trampolines on PowerPC. A     remote attacker could use this issue to cause the GNU C Library to crash, resulting in a denial of     service, or possibly execute arbitrary code. (CVE-2020-1751)

    It was discovered that the GNU C Library incorrectly handled tilde expansion. A remote attacker could use     this issue to cause the GNU C Library to crash, resulting in a denial of service, or possibly execute     arbitrary code. (CVE-2020-1752)

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

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

This update for glibc fixes the following security issues :

  - CVE-2017-18269: An SSE2-optimized memmove implementation     for i386 did not correctly perform the overlapping     memory check if the source memory range spaned the     middle of the address space, resulting in corrupt data     being produced by the copy operation. This may have     disclosed information to context-dependent attackers,     resulted in a denial of service or code execution     (bsc#1094150).

  - CVE-2018-11236: Prevent integer overflow on 32-bit     architectures when processing very long pathname     arguments to the realpath function, leading to a     stack-based buffer overflow (bsc#1094161).

  - CVE-2018-11237: An AVX-512-optimized implementation of     the mempcpy function may have writen data beyond the     target buffer, leading to a buffer overflow in
    __mempcpy_avx512_no_vzeroupper (bsc#1092877,     bsc#1094154). This update was imported from the     SUSE:SLE-15:Update update project.

An update of the glibc package has been released.

This update for glibc fixes the following security issues :

  - CVE-2017-18269: An SSE2-optimized memmove implementation     for i386 did not correctly perform the overlapping     memory check if the source memory range spaned the     middle of the address space, resulting in corrupt data     being produced by the copy operation. This may have     disclosed information to context-dependent attackers,     resulted in a denial of service or code execution     (bsc#1094150).

  - CVE-2018-11236: Prevent integer overflow on 32-bit     architectures when processing very long pathname     arguments to the realpath function, leading to a     stack-based buffer overflow (bsc#1094161).

  - CVE-2018-11237: An AVX-512-optimized implementation of     the mempcpy function may have writen data beyond the     target buffer, leading to a buffer overflow in
    __mempcpy_avx512_no_vzeroupper (bsc#1092877,     bsc#1094154).

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.

This update for glibc fixes the following issues :

CVE-2017-18269: Fix SSE2 memmove issue when crossing 2GB boundary (bsc#1094150)

CVE-2018-11236: Fix overflow in path length computation (bsc#1094161)

CVE-2018-11237: Don't write beyond buffer destination in
__mempcpy_avx512_no_vzeroupper (bsc#1094154)

Non security bugs fixed: Fix crash in resolver on memory allocation failure (bsc#1086690)

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.

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)

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)

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)

This update for glibc fixes the following issues :

  - CVE-2017-18269: Fix SSE2 memmove issue when crossing 2GB     boundary (bsc#1094150)

  - CVE-2018-11236: Fix overflow in path length computation     (bsc#1094161)

  - CVE-2018-11237: Don't write beyond buffer destination in
    __mempcpy_avx512_no_vzeroupper (bsc#1094154)

Non security bugs fixed :

  - Fix crash in resolver on memory allocation failure     (bsc#1086690)

This update was imported from the SUSE:SLE-12-SP2:Update update project.

This update for glibc fixes the following issues :

  - CVE-2017-18269: Fix SSE2 memmove issue when crossing 2GB     boundary (bsc#1094150)

  - CVE-2018-11236: Fix overflow in path length computation     (bsc#1094161)

  - CVE-2018-11237: Don't write beyond buffer destination in
    __mempcpy_avx512_no_vzeroupper (bsc#1094154) Non     security bugs fixed :

  - Fix crash in resolver on memory allocation failure     (bsc#1086690)

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.

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
138166	Ubuntu 16.04 LTS / 18.04 LTS : GNU C Library vulnerabilities (USN-4416-1)	Nessus	Ubuntu Local Security Checks	critical
123228	openSUSE Security Update : glibc (openSUSE-2019-539)	Nessus	SuSE Local Security Checks	critical
121961	Photon OS 2.0: Glibc PHSA-2018-2.0-0064	Nessus	PhotonOS Local Security Checks	critical
121853	Photon OS 1.0: Glibc PHSA-2018-1.0-0155	Nessus	PhotonOS Local Security Checks	critical
120053	SUSE SLED15 / SLES15 Security Update : glibc (SUSE-SU-2018:1991-1)	Nessus	SuSE Local Security Checks	critical
118259	SUSE SLES12 Security Update : glibc (SUSE-SU-2018:1562-2)	Nessus	SuSE Local Security Checks	critical
111501	openSUSE Security Update : glibc (openSUSE-2018-788)	Nessus	SuSE Local Security Checks	critical
111335	Amazon Linux 2 : glibc (ALAS-2018-1048)	Nessus	Amazon Linux Local Security Checks	critical
110407	openSUSE Security Update : glibc (openSUSE-2018-567)	Nessus	SuSE Local Security Checks	critical
110393	SUSE SLED12 / SLES12 Security Update : glibc (SUSE-SU-2018:1562-1)	Nessus	SuSE Local Security Checks	critical

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