alsa-2021:4587
Vulnerability from osv_almalinux
Published
2021-11-10 08:34
Modified
2021-11-18 09:31
Summary
Moderate: gcc security update
Details
The gcc packages provide compilers for C, C++, Java, Fortran, Objective C, and Ada 95 GNU, as well as related support libraries.
Security Fix(es):
- Developer environment: Unicode's bidirectional (BiDi) override characters can cause trojan source attacks (CVE-2021-42574)
The following changes were introduced in gcc in order to facilitate detection of BiDi Unicode characters:
This update implements a new warning option -Wbidirectional to warn about possibly dangerous bidirectional characters.
There are three levels of warning supported by gcc: "-Wbidirectional=unpaired", which warns about improperly terminated BiDi contexts. (This is the default.) "-Wbidirectional=none", which turns the warning off. "-Wbidirectional=any", which warns about any use of bidirectional characters.
For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.
{
"affected": [
{
"package": {
"ecosystem": "AlmaLinux:8",
"name": "cpp"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "8.5.0-4.el8_5.alma"
}
],
"type": "ECOSYSTEM"
}
]
},
{
"package": {
"ecosystem": "AlmaLinux:8",
"name": "gcc"
},
"ranges": [
{
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{
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},
{
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},
{
"package": {
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"name": "gcc-c++"
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"ranges": [
{
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},
{
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"name": "gcc-gdb-plugin"
},
"ranges": [
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]
},
{
"package": {
"ecosystem": "AlmaLinux:8",
"name": "gcc-gfortran"
},
"ranges": [
{
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{
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]
},
{
"package": {
"ecosystem": "AlmaLinux:8",
"name": "gcc-offload-nvptx"
},
"ranges": [
{
"events": [
{
"introduced": "0"
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},
{
"package": {
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"name": "gcc-plugin-devel"
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"ranges": [
{
"events": [
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},
{
"package": {
"ecosystem": "AlmaLinux:8",
"name": "libitm-devel"
},
"ranges": [
{
"events": [
{
"introduced": "0"
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"type": "ECOSYSTEM"
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]
},
{
"package": {
"ecosystem": "AlmaLinux:8",
"name": "libquadmath-devel"
},
"ranges": [
{
"events": [
{
"introduced": "0"
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},
{
"package": {
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"name": "libstdc++-devel"
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},
{
"package": {
"ecosystem": "AlmaLinux:8",
"name": "libstdc++-docs"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
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},
{
"package": {
"ecosystem": "AlmaLinux:8",
"name": "libstdc++-static"
},
"ranges": [
{
"events": [
{
"introduced": "0"
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]
}
],
"details": "The gcc packages provide compilers for C, C++, Java, Fortran, Objective C, and Ada 95 GNU, as well as related support libraries.\n\nSecurity Fix(es):\n\n* Developer environment: Unicode\u0027s bidirectional (BiDi) override characters can cause trojan source attacks (CVE-2021-42574)\n\nThe following changes were introduced in gcc in order to facilitate detection of BiDi Unicode characters:\n\nThis update implements a new warning option -Wbidirectional to warn about possibly dangerous bidirectional characters.\n\nThere are three levels of warning supported by gcc:\n\"-Wbidirectional=unpaired\", which warns about improperly terminated BiDi contexts. (This is the default.)\n\"-Wbidirectional=none\", which turns the warning off.\n\"-Wbidirectional=any\", which warns about any use of bidirectional characters.\n\nFor more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.",
"id": "ALSA-2021:4587",
"modified": "2021-11-18T09:31:35Z",
"published": "2021-11-10T08:34:56Z",
"references": [
{
"type": "REPORT",
"url": "https://vulners.com/cve/CVE-2021-42574"
}
],
"related": [
"CVE-2021-42574"
],
"summary": "Moderate: gcc security update"
}
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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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