A vulnerability was found in Micro Focus Novell Groupwise up to 2014 R2 Service Pack 1 (Groupware Software). It has been rated as critical. This issue affects some unknown functionality of the component WebAccess/Post Office Agent. The manipulation of the argument Username/Password with an unknown input leads to a integer overflow vulnerability. Using CWE to declare the problem leads to CWE-190. The product performs a calculation that can produce an integer overflow or wraparound, when the logic assumes that the resulting value will always be larger than the original value. This can introduce other weaknesses when the calculation is used for resource management or execution control. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

Integer overflow in the Post Office Agent in Novell GroupWise before 2014 R2 Service Pack 1 Hot Patch 1 might allow remote attackers to execute arbitrary code via a long (1) username or (2) password, which triggers a heap-based buffer overflow.

The weakness was presented 08/25/2016 with SEC Consult as SA-20160825-0 as not defined mailinglist post (Full-Disclosure). The advisory is shared at seclists.org. The public release was coordinated in cooperation with Micro Focus. The identification of this vulnerability is CVE-2016-5762. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. Technical details are known, but no exploit is available. The following code is the reason for this vulnerability:

((uint16_t) ((<length>) + 3) & 0xFFFC) + 1)

Therefore, a value of 65533 would cause the application to allocate 1 byte. By modifying this value accordingly, an attacker can cause the application to allocate an arbitrary amount of memory.

The vulnerability was handled as a non-public zero-day exploit for at least 51 days. During that time the estimated underground price was around $0-$5k.

Applying the patch 2014 R2 Service Pack 1 Hot Patch 1 is able to eliminate this problem. A possible mitigation has been published immediately after the disclosure of the vulnerability.

See 90951 and 90952 for similar entries.

Productinfo

Type

• Groupware Software

Vendor

• Micro Focus

Name

• Novell Groupwise

Version

• 2014 R2 Service Pack 1

License

• commercial

Support

• end of life (old version)

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CPE 2.2info

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