suse-su-2020:0266-1
Vulnerability from csaf_suse
Published
2020-01-30 14:20
Modified
2020-01-30 14:20
Summary
Security update for tigervnc

Notes

Title of the patch
Security update for tigervnc
Description of the patch
This update for tigervnc provides the following fixes: Security issues fixed: - CVE-2019-15691: Fixed a use-after-return due to incorrect usage of stack memory in ZRLEDecoder (bsc#1159856). - CVE-2019-15692: Fixed a heap-based buffer overflow in CopyRectDecode (bsc#1160250). - CVE-2019-15693: Fixed a heap-based buffer overflow in TightDecoder::FilterGradient (bsc#1159858). - CVE-2019-15694: Fixed a heap-based buffer overflow, caused by improper error handling in processing MemOutStream (bsc#1160251). - CVE-2019-15695: Fixed a stack-based buffer overflow, which could be triggered from CMsgReader::readSetCursor (bsc#1159860). Non-security issue fixed: - Make sure CN in generated certificate doesn't exceed 64 characters. (bnc#1041847) - Change with-vnc-key.sh to generate TLS certificate using current hostname to keep it short. (bsc#1041847) - Disable MIT-SHM extension when running under user 'vnc'. (bsc#1053373)
Patchnames
SUSE-2020-266,SUSE-SLE-SAP-12-SP1-2020-266,SUSE-SLE-SERVER-12-SP1-2020-266
Terms of use
CSAF 2.0 data is provided by SUSE under the Creative Commons License 4.0 with Attribution (CC-BY-4.0).


To clipboard 

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    "distribution": {
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        "text": "This update for tigervnc provides the following fixes:\n\nSecurity issues fixed:\n\n- CVE-2019-15691: Fixed a use-after-return due to incorrect usage of stack memory in ZRLEDecoder (bsc#1159856).\n- CVE-2019-15692: Fixed a heap-based buffer overflow in CopyRectDecode (bsc#1160250).\n- CVE-2019-15693: Fixed a heap-based buffer overflow in TightDecoder::FilterGradient (bsc#1159858).\n- CVE-2019-15694: Fixed a heap-based buffer overflow, caused by improper error handling in processing MemOutStream (bsc#1160251).\n- CVE-2019-15695: Fixed a stack-based buffer overflow, which could be triggered from CMsgReader::readSetCursor (bsc#1159860).\n\nNon-security issue fixed:\n\n- Make sure CN in generated certificate doesn\u0027t exceed 64 characters. (bnc#1041847)\n- Change with-vnc-key.sh to generate TLS certificate using current hostname to keep it short. (bsc#1041847)\n- Disable MIT-SHM extension when running under user \u0027vnc\u0027. (bsc#1053373)\n",
        "title": "Description of the patch"
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  "vulnerabilities": [
    {
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      "ids": [
        {
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          "text": "https://www.suse.com/security/cve/CVE-2019-15691"
        }
      ],
      "notes": [
        {
          "category": "general",
          "text": "TigerVNC version prior to 1.10.1 is vulnerable to stack use-after-return, which occurs due to incorrect usage of stack memory in ZRLEDecoder. If decoding routine would throw an exception, ZRLEDecoder may try to access stack variable, which has been already freed during the process of stack unwinding. Exploitation of this vulnerability could potentially result into remote code execution. This attack appear to be exploitable via network connectivity.",
          "title": "CVE description"
        }
      ],
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      "references": [
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        },
        {
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          "summary": "SUSE Bug 1159856 for CVE-2019-15691",
          "url": "https://bugzilla.suse.com/1159856"
        }
      ],
      "remediations": [
        {
          "category": "vendor_fix",
          "details": "To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or \"zypper patch\".\n",
          "product_ids": [
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            "SUSE Linux Enterprise Server 12 SP1-LTSS:tigervnc-1.4.3-25.11.1.s390x",
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      "scores": [
        {
          "cvss_v3": {
            "baseScore": 7.5,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
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          ]
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      ],
      "threats": [
        {
          "category": "impact",
          "date": "2020-01-30T14:20:18Z",
          "details": "important"
        }
      ],
      "title": "CVE-2019-15691"
    },
    {
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      "ids": [
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          "system_name": "SUSE CVE Page",
          "text": "https://www.suse.com/security/cve/CVE-2019-15692"
        }
      ],
      "notes": [
        {
          "category": "general",
          "text": "TigerVNC version prior to 1.10.1 is vulnerable to heap buffer overflow. Vulnerability could be triggered from CopyRectDecoder due to incorrect value checks. Exploitation of this vulnerability could potentially result into remote code execution. This attack appear to be exploitable via network connectivity.",
          "title": "CVE description"
        }
      ],
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        }
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          "details": "To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or \"zypper patch\".\n",
          "product_ids": [
            "SUSE Linux Enterprise Server 12 SP1-LTSS:tigervnc-1.4.3-25.11.1.ppc64le",
            "SUSE Linux Enterprise Server 12 SP1-LTSS:tigervnc-1.4.3-25.11.1.s390x",
            "SUSE Linux Enterprise Server 12 SP1-LTSS:tigervnc-1.4.3-25.11.1.x86_64",
            "SUSE Linux Enterprise Server 12 SP1-LTSS:xorg-x11-Xvnc-1.4.3-25.11.1.ppc64le",
            "SUSE Linux Enterprise Server 12 SP1-LTSS:xorg-x11-Xvnc-1.4.3-25.11.1.s390x",
            "SUSE Linux Enterprise Server 12 SP1-LTSS:xorg-x11-Xvnc-1.4.3-25.11.1.x86_64",
            "SUSE Linux Enterprise Server for SAP Applications 12 SP1:tigervnc-1.4.3-25.11.1.x86_64",
            "SUSE Linux Enterprise Server for SAP Applications 12 SP1:xorg-x11-Xvnc-1.4.3-25.11.1.x86_64"
          ]
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "baseScore": 7.2,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "products": [
            "SUSE Linux Enterprise Server 12 SP1-LTSS:tigervnc-1.4.3-25.11.1.ppc64le",
            "SUSE Linux Enterprise Server 12 SP1-LTSS:tigervnc-1.4.3-25.11.1.s390x",
            "SUSE Linux Enterprise Server 12 SP1-LTSS:tigervnc-1.4.3-25.11.1.x86_64",
            "SUSE Linux Enterprise Server 12 SP1-LTSS:xorg-x11-Xvnc-1.4.3-25.11.1.ppc64le",
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            "SUSE Linux Enterprise Server 12 SP1-LTSS:xorg-x11-Xvnc-1.4.3-25.11.1.x86_64",
            "SUSE Linux Enterprise Server for SAP Applications 12 SP1:tigervnc-1.4.3-25.11.1.x86_64",
            "SUSE Linux Enterprise Server for SAP Applications 12 SP1:xorg-x11-Xvnc-1.4.3-25.11.1.x86_64"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "date": "2020-01-30T14:20:18Z",
          "details": "important"
        }
      ],
      "title": "CVE-2019-15692"
    },
    {
      "cve": "CVE-2019-15693",
      "ids": [
        {
          "system_name": "SUSE CVE Page",
          "text": "https://www.suse.com/security/cve/CVE-2019-15693"
        }
      ],
      "notes": [
        {
          "category": "general",
          "text": "TigerVNC version prior to 1.10.1 is vulnerable to heap buffer overflow, which occurs in TightDecoder::FilterGradient. Exploitation of this vulnerability could potentially result into remote code execution. This attack appear to be exploitable via network connectivity.",
          "title": "CVE description"
        }
      ],
      "product_status": {
        "recommended": [
          "SUSE Linux Enterprise Server 12 SP1-LTSS:tigervnc-1.4.3-25.11.1.ppc64le",
          "SUSE Linux Enterprise Server 12 SP1-LTSS:tigervnc-1.4.3-25.11.1.s390x",
          "SUSE Linux Enterprise Server 12 SP1-LTSS:tigervnc-1.4.3-25.11.1.x86_64",
          "SUSE Linux Enterprise Server 12 SP1-LTSS:xorg-x11-Xvnc-1.4.3-25.11.1.ppc64le",
          "SUSE Linux Enterprise Server 12 SP1-LTSS:xorg-x11-Xvnc-1.4.3-25.11.1.s390x",
          "SUSE Linux Enterprise Server 12 SP1-LTSS:xorg-x11-Xvnc-1.4.3-25.11.1.x86_64",
          "SUSE Linux Enterprise Server for SAP Applications 12 SP1:tigervnc-1.4.3-25.11.1.x86_64",
          "SUSE Linux Enterprise Server for SAP Applications 12 SP1:xorg-x11-Xvnc-1.4.3-25.11.1.x86_64"
        ]
      },
      "references": [
        {
          "category": "external",
          "summary": "CVE-2019-15693",
          "url": "https://www.suse.com/security/cve/CVE-2019-15693"
        },
        {
          "category": "external",
          "summary": "SUSE Bug 1159858 for CVE-2019-15693",
          "url": "https://bugzilla.suse.com/1159858"
        }
      ],
      "remediations": [
        {
          "category": "vendor_fix",
          "details": "To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or \"zypper patch\".\n",
          "product_ids": [
            "SUSE Linux Enterprise Server 12 SP1-LTSS:tigervnc-1.4.3-25.11.1.ppc64le",
            "SUSE Linux Enterprise Server 12 SP1-LTSS:tigervnc-1.4.3-25.11.1.s390x",
            "SUSE Linux Enterprise Server 12 SP1-LTSS:tigervnc-1.4.3-25.11.1.x86_64",
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            "SUSE Linux Enterprise Server 12 SP1-LTSS:xorg-x11-Xvnc-1.4.3-25.11.1.x86_64",
            "SUSE Linux Enterprise Server for SAP Applications 12 SP1:tigervnc-1.4.3-25.11.1.x86_64",
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          ]
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "baseScore": 7.5,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
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            "SUSE Linux Enterprise Server 12 SP1-LTSS:tigervnc-1.4.3-25.11.1.s390x",
            "SUSE Linux Enterprise Server 12 SP1-LTSS:tigervnc-1.4.3-25.11.1.x86_64",
            "SUSE Linux Enterprise Server 12 SP1-LTSS:xorg-x11-Xvnc-1.4.3-25.11.1.ppc64le",
            "SUSE Linux Enterprise Server 12 SP1-LTSS:xorg-x11-Xvnc-1.4.3-25.11.1.s390x",
            "SUSE Linux Enterprise Server 12 SP1-LTSS:xorg-x11-Xvnc-1.4.3-25.11.1.x86_64",
            "SUSE Linux Enterprise Server for SAP Applications 12 SP1:tigervnc-1.4.3-25.11.1.x86_64",
            "SUSE Linux Enterprise Server for SAP Applications 12 SP1:xorg-x11-Xvnc-1.4.3-25.11.1.x86_64"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "date": "2020-01-30T14:20:18Z",
          "details": "important"
        }
      ],
      "title": "CVE-2019-15693"
    },
    {
      "cve": "CVE-2019-15694",
      "ids": [
        {
          "system_name": "SUSE CVE Page",
          "text": "https://www.suse.com/security/cve/CVE-2019-15694"
        }
      ],
      "notes": [
        {
          "category": "general",
          "text": "TigerVNC version prior to 1.10.1 is vulnerable to heap buffer overflow, which could be triggered from DecodeManager::decodeRect. Vulnerability occurs due to the signdness error in processing MemOutStream. Exploitation of this vulnerability could potentially result into remote code execution. This attack appear to be exploitable via network connectivity.",
          "title": "CVE description"
        }
      ],
      "product_status": {
        "recommended": [
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      "references": [
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          "category": "external",
          "summary": "CVE-2019-15694",
          "url": "https://www.suse.com/security/cve/CVE-2019-15694"
        },
        {
          "category": "external",
          "summary": "SUSE Bug 1160251 for CVE-2019-15694",
          "url": "https://bugzilla.suse.com/1160251"
        }
      ],
      "remediations": [
        {
          "category": "vendor_fix",
          "details": "To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or \"zypper patch\".\n",
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            "SUSE Linux Enterprise Server 12 SP1-LTSS:tigervnc-1.4.3-25.11.1.ppc64le",
            "SUSE Linux Enterprise Server 12 SP1-LTSS:tigervnc-1.4.3-25.11.1.s390x",
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            "SUSE Linux Enterprise Server 12 SP1-LTSS:xorg-x11-Xvnc-1.4.3-25.11.1.s390x",
            "SUSE Linux Enterprise Server 12 SP1-LTSS:xorg-x11-Xvnc-1.4.3-25.11.1.x86_64",
            "SUSE Linux Enterprise Server for SAP Applications 12 SP1:tigervnc-1.4.3-25.11.1.x86_64",
            "SUSE Linux Enterprise Server for SAP Applications 12 SP1:xorg-x11-Xvnc-1.4.3-25.11.1.x86_64"
          ]
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "baseScore": 7.2,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
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            "SUSE Linux Enterprise Server 12 SP1-LTSS:xorg-x11-Xvnc-1.4.3-25.11.1.ppc64le",
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            "SUSE Linux Enterprise Server for SAP Applications 12 SP1:xorg-x11-Xvnc-1.4.3-25.11.1.x86_64"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "date": "2020-01-30T14:20:18Z",
          "details": "important"
        }
      ],
      "title": "CVE-2019-15694"
    },
    {
      "cve": "CVE-2019-15695",
      "ids": [
        {
          "system_name": "SUSE CVE Page",
          "text": "https://www.suse.com/security/cve/CVE-2019-15695"
        }
      ],
      "notes": [
        {
          "category": "general",
          "text": "TigerVNC version prior to 1.10.1 is vulnerable to stack buffer overflow, which could be triggered from CMsgReader::readSetCursor. This vulnerability occurs due to insufficient sanitization of PixelFormat. Since remote attacker can choose offset from start of the buffer to start writing his values, exploitation of this vulnerability could potentially result into remote code execution. This attack appear to be exploitable via network connectivity.",
          "title": "CVE description"
        }
      ],
      "product_status": {
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        {
          "category": "external",
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        },
        {
          "category": "external",
          "summary": "SUSE Bug 1159860 for CVE-2019-15695",
          "url": "https://bugzilla.suse.com/1159860"
        }
      ],
      "remediations": [
        {
          "category": "vendor_fix",
          "details": "To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or \"zypper patch\".\n",
          "product_ids": [
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            "SUSE Linux Enterprise Server 12 SP1-LTSS:xorg-x11-Xvnc-1.4.3-25.11.1.ppc64le",
            "SUSE Linux Enterprise Server 12 SP1-LTSS:xorg-x11-Xvnc-1.4.3-25.11.1.s390x",
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            "SUSE Linux Enterprise Server for SAP Applications 12 SP1:xorg-x11-Xvnc-1.4.3-25.11.1.x86_64"
          ]
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "baseScore": 7.5,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
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            "SUSE Linux Enterprise Server 12 SP1-LTSS:tigervnc-1.4.3-25.11.1.x86_64",
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            "SUSE Linux Enterprise Server 12 SP1-LTSS:xorg-x11-Xvnc-1.4.3-25.11.1.s390x",
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            "SUSE Linux Enterprise Server for SAP Applications 12 SP1:tigervnc-1.4.3-25.11.1.x86_64",
            "SUSE Linux Enterprise Server for SAP Applications 12 SP1:xorg-x11-Xvnc-1.4.3-25.11.1.x86_64"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "date": "2020-01-30T14:20:18Z",
          "details": "important"
        }
      ],
      "title": "CVE-2019-15695"
    }
  ]
}


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Sightings

Author Source Type Date

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
  • Confirmed: The vulnerability is confirmed from an analyst perspective.
  • Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
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  • Not patched: This vulnerability was not successfully patched by the user reporting the sighting.