GNU C Library up to 2.28 on x32 String memmove-vec-unaligned-erms.S __memmove_avx_unaligned_erms denial of service

Summaryinfo

A vulnerability labeled as problematic has been found in GNU C Library up to 2.28 on x32. The impacted element is the function __memmove_avx_unaligned_erms of the file sysdeps/x86_64/multiarch/memmove-vec-unaligned-erms.S of the component String Handler. The manipulation results in denial of service. This vulnerability is reported as CVE-2019-6488. The attack requires a local approach. No exploit exists.

Detailsinfo

A vulnerability, which was classified as problematic, was found in GNU C Library up to 2.28 on x32 (Software Library). Affected is the function __memmove_avx_unaligned_erms of the file sysdeps/x86_64/multiarch/memmove-vec-unaligned-erms.S of the component String Handler. The manipulation with an unknown input leads to a denial of service vulnerability. CWE is classifying the issue as CWE-404. The product does not release or incorrectly releases a resource before it is made available for re-use. This is going to have an impact on availability. CVE summarizes:

The string component in the GNU C Library (aka glibc or libc6) through 2.28, when running on the x32 architecture, incorrectly attempts to use a 64-bit register for size_t in assembly codes, which can lead to a segmentation fault or possibly unspecified other impact, as demonstrated by a crash in __memmove_avx_unaligned_erms in sysdeps/x86_64/multiarch/memmove-vec-unaligned-erms.S during a memcpy.

The bug was discovered 01/21/2019. The weakness was disclosed 01/18/2019 (Website). The advisory is shared for download at securityfocus.com. This vulnerability is traded as CVE-2019-6488 since 01/18/2019. The exploitability is told to be easy. The attack needs to be approached locally. The exploitation doesn't require any form of authentication. There are known technical details, but no exploit is available.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the vulnerability database at SecurityFocus (BID 106671†). Once again VulDB remains the best source for vulnerability data.

Productinfo

Type

• Software Library

Vendor

• GNU

Name

• C Library

Version

• 2.0
• 2.1
• 2.2
• 2.3
• 2.4
• 2.5
• 2.6
• 2.7
• 2.8
• 2.9
• 2.10
• 2.11
• 2.12
• 2.13
• 2.14
• 2.15
• 2.16
• 2.17
• 2.18
• 2.19
• 2.20
• 2.21
• 2.22
• 2.23
• 2.24
• 2.25
• 2.26
• 2.27
• 2.28

License

• open-source

Website

• Vendor: https://www.gnu.org/

CPE 2.3info

• 🔍
• 🔍
• 🔍

CPE 2.2info

• 🔍
• 🔍
• 🔍

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Entryinfo

Once again VulDB remains the best source for vulnerability data.

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