VAR-200801-0305
Vulnerability from variot - Updated: 2023-12-18 13:10Cisco Systems VPN Client IPSec Driver (CVPNDRVA.sys) 5.0.02.0090 allows local users to cause a denial of service (crash) by calling the 0x80002038 IOCTL with a small size value, which triggers memory corruption. Successfully exploiting this issue allows local attackers to crash affected computers, denying further service to legitimate users. This issue affects 'cvpndrva.sys' 5.0.02.0090; other versions of the driver may also be affected. Cisco VPN Client is a set of cross-platform VPN client software from Cisco.
A new version (0.9.0.0 - Release Candidate 1) of the free Secunia PSI has been released. The new version includes many new and advanced features, which makes it even easier to stay patched. This can be exploited to cause a memory corruption within kernel space by sending specially crafted IOCTLs to the affected driver, resulting in a system crash.
The vulnerability is reported in CVPNDRVA.sys version 5.0.02.0090.
SOLUTION: Restrict access to trusted users.
PROVIDED AND/OR DISCOVERED BY: mu-b, Digit-Labs
ORIGINAL ADVISORY: http://milw0rm.com/exploits/4911
About: This Advisory was delivered by Secunia as a free service to help everybody keeping their systems up to date against the latest vulnerabilities.
Subscribe: http://secunia.com/secunia_security_advisories/
Definitions: (Criticality, Where etc.) http://secunia.com/about_secunia_advisories/
Please Note: Secunia recommends that you verify all advisories you receive by clicking the link. Secunia NEVER sends attached files with advisories. Secunia does not advise people to install third party patches, only use those supplied by the vendor.
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"data": "Cisco Systems VPN Client IPSec Driver (CVPNDRVA.sys) 5.0.02.0090 allows local users to cause a denial of service (crash) by calling the 0x80002038 IOCTL with a small size value, which triggers memory corruption. \nSuccessfully exploiting this issue allows local attackers to crash affected computers, denying further service to legitimate users. \nThis issue affects \u0027cvpndrva.sys\u0027 5.0.02.0090; other versions of the driver may also be affected. Cisco VPN Client is a set of cross-platform VPN client software from Cisco. \n\n----------------------------------------------------------------------\n\nA new version (0.9.0.0 - Release Candidate 1) of the free Secunia PSI\nhas been released. The new version includes many new and advanced\nfeatures, which makes it even easier to stay patched. This can be exploited\nto cause a memory corruption within kernel space by sending specially\ncrafted IOCTLs to the affected driver, resulting in a system crash. \n\nThe vulnerability is reported in CVPNDRVA.sys version 5.0.02.0090. \n\nSOLUTION:\nRestrict access to trusted users. \n\nPROVIDED AND/OR DISCOVERED BY:\nmu-b, Digit-Labs\n\nORIGINAL ADVISORY:\nhttp://milw0rm.com/exploits/4911\n\n----------------------------------------------------------------------\n\nAbout:\nThis Advisory was delivered by Secunia as a free service to help\neverybody keeping their systems up to date against the latest\nvulnerabilities. \n\nSubscribe:\nhttp://secunia.com/secunia_security_advisories/\n\nDefinitions: (Criticality, Where etc.)\nhttp://secunia.com/about_secunia_advisories/\n\n\nPlease Note:\nSecunia recommends that you verify all advisories you receive by\nclicking the link. \nSecunia NEVER sends attached files with advisories. \nSecunia does not advise people to install third party patches, only\nuse those supplied by the vendor. \n\n----------------------------------------------------------------------\n\nUnsubscribe: Secunia Security Advisories\nhttp://secunia.com/sec_adv_unsubscribe/?email=packet%40packetstormsecurity.org\n\n----------------------------------------------------------------------\n\n\n",
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Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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