Summaryinfo

A vulnerability, which was classified as critical, was found in UPX 3.94. This affects the function PackLinuxElf64::unpack of the file p_lx_elf.cpp of the component ELF File Header Handler. The manipulation as part of Binary File leads to null pointer dereference. This vulnerability is uniquely identified as CVE-2017-15056. It is possible to initiate the attack remotely. There is no exploit available. It is recommended to upgrade the affected component. If you want to get best quality of vulnerability data, you may have to visit VulDB.

Detailsinfo

A vulnerability, which was classified as critical, has been found in UPX 3.94. Affected by this issue is the function PackLinuxElf64::unpack of the file p_lx_elf.cpp of the component ELF File Header Handler. The manipulation as part of a Binary File leads to a null pointer dereference vulnerability. Using CWE to declare the problem leads to CWE-476. A NULL pointer dereference occurs when the application dereferences a pointer that it expects to be valid, but is NULL, typically causing a crash or exit. Impacted is confidentiality, integrity, and availability. CVE summarizes:

p_lx_elf.cpp in UPX 3.94 mishandles ELF headers, which allows remote attackers to cause a denial of service (application crash) or possibly have unspecified other impact via a crafted binary file, as demonstrated by an Invalid Pointer Read in PackLinuxElf64::unpack().

The bug was discovered 10/02/2017. The weakness was published 10/06/2017 (Website). The advisory is available at github.com. This vulnerability is handled as CVE-2017-15056 since 10/06/2017. The attack may be launched remotely. No form of authentication is required for exploitation. Technical details are known, but there is no available exploit.

The vulnerability was handled as a non-public zero-day exploit for at least 4 days. During that time the estimated underground price was around $0-$5k. The vulnerability scanner Nessus provides a plugin with the ID 103951 (Fedora 25 : upx (2017-caafcbd6b9)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Fedora Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 170458 (OpenSUSE Security Update for upx (openSUSE-SU-2017:2766-1)).

Upgrading eliminates this vulnerability. A possible mitigation has been published 2 weeks after the disclosure of the vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (103951). If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

Name

• UPX

Version

• 3.94

License

• free

CPE 2.3info

• 🔍

CPE 2.2info

• 🔍

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