OpenConnect 8.09 has a buffer overflow, causing a denial of service (application crash) or possibly unspecified other impact, via crafted certificate data to get_cert_name in gnutls.c.

The remote SUSE Linux SLED15 / SLED_SAP15 / SLES15 / SLES_SAP15 / openSUSE 15 host has packages installed that are affected by multiple vulnerabilities as referenced in the SUSE-SU-2024:0317-1 advisory.

  - OpenConnect through 8.08 mishandles negative return values from X509_check_ function calls, which might     assist attackers in performing man-in-the-middle attacks. (CVE-2020-12105)

  - OpenConnect 8.09 has a buffer overflow, causing a denial of service (application crash) or possibly     unspecified other impact, via crafted certificate data to get_cert_name in gnutls.c. (CVE-2020-12823)

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

This update for openconnect fixes the following issues :

&#9; - CVE-2020-12823: Fixed a buffer overflow via crafted certificate data which could have led to denial of service (bsc#1171862).

This update was imported from the SUSE:SLE-15:Update update project.

The remote host is affected by the vulnerability described in GLSA-202006-15 (OpenConnect: Multiple vulnerabilities)

    Multiple vulnerabilities have been discovered in OpenConnect. Please       review the CVE identifiers referenced below for details.
  Impact :

    Please review the referenced CVE identifiers for details.
  Workaround :

    There is no known workaround at this time.

Update to 8.10 release (CVE-2020-12823)

Note that Tenable Network Security has extracted the preceding description block directly from the Fedora update system website.
Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

OpenConnect, a VPN software, had a buffer overflow, causing a denial of service (application crash) or possibly unspecified other impact, via crafted certificate data to get_cert_name in gnutls.c.

For Debian 8 'Jessie', this problem has been fixed in version 6.00-2+deb8u2.

We recommend that you upgrade your openconnect packages.

NOTE: Tenable Network Security has extracted the preceding description block directly from the DLA security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

ID	Name	Product	Family	Severity
189956	SUSE SLED15 / SLES15 / openSUSE 15 Security Update : openconnect (SUSE-SU-2024:0317-1)	Nessus	SuSE Local Security Checks	critical
138829	openSUSE Security Update : openconnect (openSUSE-2020-1027)	Nessus	SuSE Local Security Checks	critical
138756	openSUSE Security Update : openconnect (openSUSE-2020-997)	Nessus	SuSE Local Security Checks	critical
137452	GLSA-202006-15 : OpenConnect: Multiple vulnerabilities	Nessus	Gentoo Local Security Checks	critical
136845	Fedora 30 : openconnect (2020-bc22f06aa3)	Nessus	Fedora Local Security Checks	critical
136838	Fedora 31 : openconnect (2020-2af15c566e)	Nessus	Fedora Local Security Checks	critical
136673	Debian DLA-2212-1 : openconnect security update	Nessus	Debian Local Security Checks	critical

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CVE-2020-12823

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