rhsa-2011_1104
Vulnerability from csaf_redhat
Published
2011-07-28 18:09
Modified
2024-11-22 04:30
Summary
Red Hat Security Advisory: libpng security update
Notes
Topic
Updated libpng packages that fix two security issues are now available for
Red Hat Enterprise Linux 5.
The Red Hat Security Response Team has rated this update as having moderate
security impact. Common Vulnerability Scoring System (CVSS) base scores,
which give detailed severity ratings, are available for each vulnerability
from the CVE links in the References section.
Details
The libpng packages contain a library of functions for creating and
manipulating PNG (Portable Network Graphics) image format files.
A buffer overflow flaw was found in the way libpng processed certain PNG
image files. An attacker could create a specially-crafted PNG image that,
when opened, could cause an application using libpng to crash or,
potentially, execute arbitrary code with the privileges of the user running
the application. (CVE-2011-2690)
Note: The application behavior required to exploit CVE-2011-2690 is rarely
used. No application shipped with Red Hat Enterprise Linux behaves this
way, for example.
An uninitialized memory read issue was found in the way libpng processed
certain PNG images that use the Physical Scale (sCAL) extension. An
attacker could create a specially-crafted PNG image that, when opened,
could cause an application using libpng to crash. (CVE-2011-2692)
Users of libpng should upgrade to these updated packages, which contain
backported patches to correct these issues. All running applications using
libpng must be restarted for the update to take effect.
Terms of Use
This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Red Hat Inc. and provide a link to the original.
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"text": "The libpng packages contain a library of functions for creating and\nmanipulating PNG (Portable Network Graphics) image format files.\n\nA buffer overflow flaw was found in the way libpng processed certain PNG\nimage files. An attacker could create a specially-crafted PNG image that,\nwhen opened, could cause an application using libpng to crash or,\npotentially, execute arbitrary code with the privileges of the user running\nthe application. (CVE-2011-2690)\n\nNote: The application behavior required to exploit CVE-2011-2690 is rarely\nused. No application shipped with Red Hat Enterprise Linux behaves this\nway, for example.\n\nAn uninitialized memory read issue was found in the way libpng processed\ncertain PNG images that use the Physical Scale (sCAL) extension. An\nattacker could create a specially-crafted PNG image that, when opened,\ncould cause an application using libpng to crash. (CVE-2011-2692)\n\nUsers of libpng should upgrade to these updated packages, which contain\nbackported patches to correct these issues. All running applications using\nlibpng must be restarted for the update to take effect.",
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"text": "libpng: buffer overwrite in png_rgb_to_gray",
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"text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
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"text": "The png_handle_sCAL function in pngrutil.c in libpng 1.0.x before 1.0.55, 1.2.x before 1.2.45, 1.4.x before 1.4.8, and 1.5.x before 1.5.4 does not properly handle invalid sCAL chunks, which allows remote attackers to cause a denial of service (memory corruption and application crash) or possibly have unspecified other impact via a crafted PNG image that triggers the reading of uninitialized memory.",
"title": "Vulnerability description"
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{
"category": "summary",
"text": "libpng: Invalid read when handling empty sCAL chunks",
"title": "Vulnerability summary"
},
{
"category": "general",
"text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
"title": "CVSS score applicability"
}
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"accessVector": "NETWORK",
"authentication": "NONE",
"availabilityImpact": "PARTIAL",
"baseScore": 4.3,
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"vectorString": "AV:N/AC:M/Au:N/C:N/I:N/A:P",
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"threats": [
{
"category": "impact",
"details": "Moderate"
}
],
"title": "libpng: Invalid read when handling empty sCAL chunks"
}
]
}
Loading…
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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.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.