Sylpheed up to 3.6 URL libsylph/utils.c BROWSER injection

Summaryinfo

A vulnerability categorized as critical has been discovered in Sylpheed up to 3.6. The impacted element is an unknown function of the file libsylph/utils.c of the component URL Handler. Such manipulation of the argument BROWSER as part of Environment Variable leads to injection. This vulnerability is listed as CVE-2017-17517. The attack may be performed from remote. There is no available exploit.

Detailsinfo

A vulnerability was found in Sylpheed up to 3.6 and classified as critical. Affected by this issue is an unknown functionality of the file libsylph/utils.c of the component URL Handler. The manipulation of the argument BROWSER as part of a Environment Variable leads to a injection vulnerability. Using CWE to declare the problem leads to CWE-74. The product constructs all or part of a command, data structure, or record using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify how it is parsed or interpreted when it is sent to a downstream component. Impacted is confidentiality, integrity, and availability. CVE summarizes:

libsylph/utils.c in Sylpheed through 3.6 does not validate strings before launching the program specified by the BROWSER environment variable, which might allow remote attackers to conduct argument-injection attacks via a crafted URL.

The bug was discovered 12/11/2017. The weakness was presented 12/14/2017 (Website). The advisory is available at security-tracker.debian.org. This vulnerability is handled as CVE-2017-17517 since 12/11/2017. The attack may be launched remotely. No form of authentication is required for exploitation. Successful exploitation requires user interaction by the victim. Technical details are known, but there is no available exploit. This vulnerability is assigned to T1055 by the MITRE ATT&CK project.

The vulnerability was handled as a non-public zero-day exploit for at least 3 days. During that time the estimated underground price was around $0-$5k.

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

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Productinfo

Name

• Sylpheed

Version

• 3.0
• 3.1
• 3.2
• 3.3
• 3.4
• 3.5
• 3.6

CPE 2.3info

• 🔍
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CPE 2.2info

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