Sophos Anti-Virus PDF Document Encrypted PDF File memory corruption

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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6.6$0-$5k0.00

A vulnerability, which was classified as critical, has been found in Sophos Anti-Virus (Anti-Malware Software) (affected version not known). This issue affects some unknown functionality of the component PDF Document Handler. The manipulation as part of a Encrypted PDF File leads to a memory corruption vulnerability. Using CWE to declare the problem leads to CWE-119. The product performs operations on a memory buffer, but it can read from or write to a memory location that is outside of the intended boundary of the buffer. Impacted is confidentiality, integrity, and availability.

The weakness was shared 11/05/2012 by Tavis Ormandy (@taviso) with Google Security Team as sophailv2.pdf as confirmed document (Full-Disclosure). The advisory is shared at lock.cmpxchg8b.com. The vendor cooperated in the coordination of the public release. As demonstrated in the initial paper, installing Sophos Antivirus exposes machines to considerable risk. If Sophos do not urgently improve their security posture, their continued deployment causes significant risk to global networks and infrastructure. The exploitation is known to be difficult. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. Technical details are unknown but a public exploit is available.

A public exploit has been developed by Tavis Ormandy (@taviso) and been published immediately after the advisory. The exploit is available at exploit-db.com. It is declared as proof-of-concept. The vulnerability was handled as a non-public zero-day exploit for at least 42 days. During that time the estimated underground price was around $25k-$100k.

Applying a patch is able to eliminate this problem. A possible mitigation has been published even before and not after the disclosure of the vulnerability. In response to early access to the initial report, Sophos did allocate some resources to resolve the issues discussed, however they were cearly ill-equipped to handle the output of one co-operative, non-adversarial security researcher. A sophisticated state-sponsored or highly motivated attacker could devastate the entire Sophos user base with ease.

The vulnerability is also documented in the databases at X-Force (79814) and Exploit-DB (22509). nakedsecurity.sophos.com is providing further details. The entries 6868, 6865, 6866 and 6870 are related to this item.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB CVSS-B Score: 🔍
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CVSSv3info

VulDB Meta Base Score: 7.3
VulDB Meta Temp Score: 6.6

VulDB Base Score: 7.3
VulDB Temp Score: 6.6
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
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Exploitinginfo

Class: Memory corruption
CWE: CWE-119
ATT&CK: Unknown

Local: No
Remote: Yes

Availability: 🔍
Access: Public
Status: Proof-of-Concept
Author: Tavis Ormandy (@taviso)
Download: 🔍
Price Prediction: 🔍
Current Price Estimation: 🔍

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Exploit-DB: 🔍

Threat Intelligenceinfo

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Countermeasuresinfo

Recommended: Patch
Status: 🔍

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Timelineinfo

09/10/2012 🔍
10/05/2012 +25 days 🔍
10/22/2012 +17 days 🔍
11/05/2012 +14 days 🔍
11/05/2012 +0 days 🔍
11/05/2012 +0 days 🔍
11/05/2012 +0 days 🔍
11/06/2012 +1 days 🔍
11/07/2012 +1 days 🔍
11/07/2012 +0 days 🔍
04/15/2018 +1985 days 🔍

Sourcesinfo

Vendor: sophos.com

Advisory: sophailv2.pdf
Researcher: Tavis Ormandy (@taviso)
Organization: Google Security Team
Status: Confirmed
Coordinated: 🔍
X-Force: 79814, High Risk
SecurityTracker: 1027725
SecurityFocus: 56401 - Sophos Antivirus Multiple Security Vulnerabilities
Secunia: 51156 - Sophos Anti-Virus Multiple Vulnerabilities, Highly Critical
OSVDB: 87060

scip Labs: https://www.scip.ch/en/?labs.20161013
Misc.: 🔍
See also: 🔍

Entryinfo

Created: 11/07/2012 09:33
Updated: 04/15/2018 09:15
Changes: 11/07/2012 09:33 (80), 04/15/2018 09:15 (3)
Complete: 🔍

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